Patent Publication Number: US-11644048-B2

Title: Ceiling fan

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit of the following, and is a continuation of U.S. patent application Ser. No. 16/251,453, filed Jan. 18, 2019, currently allowed, which is a continuation of U.S. patent application Ser. No. 15/891,746, filed Feb. 8, 2018, now issued as U.S. Pat. No. 10,233,947, which is a continuation of U.S. patent application Ser. No. 15/630,255, filed Jun. 22, 2017, now issued as U.S. Pat. No. 9,982,679, which is a continuation of U.S. patent application Ser. No. 15/378,806 filed Dec. 14, 2016, now issued as U.S. Pat. No. 10,648,485, which claims priority to U.S. Provisional Patent Application No. 62/267,033, filed Dec. 14, 2015, U.S. Provisional Patent Application No. 62/281,860 filed Jan. 22, 2016, U.S. Provisional Patent Application No. 62/281,866 filed Jan. 22, 2016, and U.S. Provisional Patent Application No. 62/350,799 filed Jun. 16, 2016, all of which are incorporated herein by reference in their entirety. This application is also related to U.S. patent application Ser. No. 15/378,886, filed Dec. 14, 2016. 
    
    
     BACKGROUND OF THE INVENTION 
     Ceiling fans are used to generate airflow within a space or area, often used for cooling or temperature regulation. Ceiling fans can be used in industrial, commercial or farming environments to circulate air to maintain proper temperature regulation. This is commonly accomplished with the use of high volume, low speed fans. 
     BRIEF DESCRIPTION OF THE INVENTION 
     In one aspect, the disclosure relates to a ceiling fan comprising: a motor assembly comprising a hollow, non-rotating motor shaft, a stator mounted to the motor shaft, with the motor shaft terminating at opposing upper and lower ends; a retainer plate positioned below the lower end of the motor shaft; and a retaining rod having opposing upper and lower ends, the retaining rod passing through the hollow of the motor shaft, with the lower end of the retaining rod secured to the retainer plate below the lower end of the motor shaft, and the upper end of the retainer rod extends above the upper end of the motor shaft. 
     In another aspect, the disclosure relates to a mounting system for a ceiling fan having a hollow motor shaft and a motor housing, the mount system comprising: a retainer plate including an opening and positioned wholly below a lower end of the motor shaft; a retaining rod passing entirely through the hollow motor shaft and through the opening in the retainer plate, and including a cap configured to carry the retainer plate on the retaining rod; and a support cable coupled to the retaining rod above the motor shaft and configured to suspend the retaining rod from a structure; wherein the retainer plate provides a redundant mount for the ceiling fan. 
     In yet another aspect, the disclosure relates to a method of suspending a ceiling fan having a hollow motor shaft, the method comprising: suspending a retainer plate at a bottom of the ceiling fan wholly below the motor shaft, using a retaining rod passing entirely through the hollow motor shaft and secured to the retainer plate, from a structure suspending the ceiling fan; wherein the retainer plate is configured to support the ceiling fan by a cable securing the retaining rod to the structure thereby carrying the ceiling fan on the retainer plate. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In the drawings: 
         FIG.  1 A  is a top perspective view of a ceiling fan having several embodiments of the invention. 
         FIG.  1 B  is an enlarged top perspective view of the ceiling fan of  FIG.  1 A  illustrating a motor housing, blade mount, and downrod assembly with a guy wire fitting. 
         FIG.  1 C  is an enlarged bottom perspective view of the ceiling fan of  FIG.  1 A  illustrating the motor housing and a retention system. 
         FIG.  1 D  is an exploded view illustrating the internal components of the ceiling fan of  FIG.  1 B . 
         FIG.  2 A  is a top perspective view of the downrod assembly of the ceiling fan of  FIGS.  1 A- 1 D . 
         FIG.  2 B  is an exploded view of the downrod of  FIG.  2 A  including turnbuckles. 
         FIG.  2 C  is an exploded view of an motor shaft utilizing press studs and a retainer nut for mounting to the downrod of  FIG.  2 A . 
         FIG.  3 A  is a top view of a fan blade of the ceiling fan of  FIG.  1   . 
         FIG.  3 B  is a cross-sectional view of the blade of  FIG.  3 A . 
         FIG.  3 C  is a close-up view illustrating a two-part embodiment of the blade of  FIG.  3 A . 
         FIG.  4 A  is a perspective view a blade holder of the ceiling fan of  FIG.  1   . 
         FIG.  4 B  is an exploded view of the blade holder of  FIG.  4 A  having a push-lock assembly removed. 
         FIG.  4 C  is an exploded view of the push-lock assembly of  FIG.  4 B . 
         FIG.  5 A  is a top perspective view of an upper portion of a motor housing with a close-up section of a blade mount. 
         FIG.  5 B  is an exploded view illustrating the combination of the upper portion of the motor housing, blade holder, and blade. 
         FIG.  6    is an exploded view of a portion of a motor housing assembly of  FIG.  1   . 
         FIG.  7 A  is a top perspective view of an alternative motor housing assembly. 
         FIG.  7 B  is an exploded view of the motor housing assembly of  FIG.  7 A . 
         FIG.  7 C  is a top view of the motor housing assembly of  FIG.  7 A  with a blade holder exploded from the motor housing assembly. 
         FIG.  8 A  is a perspective view of the motor shaft of  FIG.  2 C . 
         FIG.  8 B  is a cross-sectional view of the motor shaft of  FIG.  8 A  including bearings. 
         FIG.  8 C  is a cross-sectional view of the motor housing assembly of  FIG.  1   . 
         FIG.  9 A  is a perspective view of a retainer system of the ceiling fan of  FIG.  1     
         FIG.  9 B  is an exploded view of the retainer system of  FIG.  9 A . 
         FIG.  10 A  is a top perspective view of a wiring harness of the ceiling fan of  FIG.  1   . 
         FIG.  10 B  is an exploded view of the wiring harness of  FIG.  10 A  illustrating connection to a stator and the motor shaft of  FIG.  2 A . 
         FIG.  11 A  is a cross-sectional view of the retainer system of  FIG.  9 A  and the wiring harness of  FIG.  10 A  disposed within the motor shaft. 
         FIG.  11 B  is an exploded view of all components comprising the motor assembly of the ceiling fan of  FIG.  1   . 
         FIG.  12    is perspective view of an alternative ceiling fan according to aspects described herein. 
         FIG.  13    is an enlarged view of a motor housing of the alternative ceiling fan of  FIG.  12   . 
         FIG.  14    is a cross section of the motor housing taken across section XIV-XIV of  FIG.  13   . 
         FIG.  15    is an exploded view of the motor housing of  FIG.  14   . 
         FIG.  16    is a perspective view of a mount strut to mount to the motor housing of  FIG.  13   . 
         FIG.  17    is a perspective view of a blade holder with a push-lock assembly exploded therefrom. 
         FIG.  18    is a perspective view of the push-lock assembly of  FIG.  17   , with an end cap shown in dashed line. 
     
    
    
     DESCRIPTION OF EMBODIMENTS OF THE INVENTION 
     The described embodiments of the present invention are directed to systems, methods, and other devices related to a ceiling fan. 
       FIG.  1    illustrates a top perspective view of a ceiling fan  10 . The ceiling fan  10  includes a ceiling mount structure  12  for mounting to a ceiling (not shown) or a structure, having a downrod assembly  14  extending therefrom. The downrod assembly  14  couples to a motor assembly  16 . A plurality of blade holders  18  couple the blades  20  to the motor assembly  16 . While five blades  20  and five blade holders  18  are shown, any number of blades  20  and blade holders  18  are contemplated. Optionally, a plurality of guy wires  22  can be used to mount to the downrod assembly  14  to the ceiling separate from the ceiling mount structure  12 . As used herein, the ceiling or structure can be any structure from which the ceiling fan can suspend from or mount. For example, the ceiling can be the ceiling of a building, factory, or farm building. 
       FIG.  1 B  is a close-up view of the downrod assembly  14  and motor assembly  16 . The ceiling mount structure  12  includes a mount plate  13  having two upper plates  15  for securing the ceiling mount structure  12  to the building with a bolted assembly. A support cable  302  and wiring conduit  342  extending from within the downrod assembly  14  underneath the mount plate  13  for coupling the ceiling fan  10  to the structure and an electrical power supply, respectively. The wiring conduit  342  terminates in an electrical connector  343 . A downrod plate  50  couples the downrod assembly  14  to the motor assembly  16 . The downrod assembly  14  further includes a guy wire fitting  58  for coupling the guy wires  22  to the downrod assembly  14  utilizing a set of turnbuckles  80 . A motor housing  198  includes a plurality of mounts  204  for coupling the blades  20  to the motor assembly  16  with the blade holders  18 .  FIG.  1 C  illustrates a portion of a retention system  300 , while the remaining portion is internal of the motor assembly  16 . The retention system  300  includes a retainer plate  310  disposed along the bottom of the motor housing  198 , providing a redundant suspension for suspending the ceiling fan  10  from the ceiling or structure. Additionally, the bottom of the mount plate  13  includes two integral tabs  24  for mounting the plate to a fastener  19 . The fastener  19  couples the mount plate  13  to the downrod assembly  14  at the swivel mount  36 . The tabs  24  are formed in the mount plate  13  during manufacture, as compared to welding of the tabs  24 , which reduces cost while improving reliability of the tabs  24  during fan operation. 
       FIG.  1 D  is an exploded view illustrating the combination of components comprising the downrod assembly  14  and the motor assembly  16 . The downrod assembly  14  includes a hollow rod  30  having a swivel mount  36  for coupling the downrod assembly  14  to the ceiling mount structure  12 . The guy wire fitting  58  mounts around the hollow rod  30 . A downrod plate  50  mounts to the downrod assembly  14  opposite of the swivel mount  36 . The downrod plate  50  couples to a shaft coupler  52  for coupling the downrod assembly  14  to the motor assembly  16 . The motor assembly  16  includes the motor housing  198  split into an upper housing portion  200  and a lower housing portion  230 . A non-rotating motor shaft  90  is disposed within the motor housing  198  for supporting a stator  232 , upper bearing  272 , and lower bearing  274 . A retainer nut  92  can be used to secure the motor shaft  90  to the downrod assembly  14  at the shaft coupler  52 . A spring member  282  can be disposed between the lower bearing  274  and the lower motor housing portion  230 . A rotor  234  mounts to the upper and lower motor housing portions  200 ,  230 , such that the motor housing  198  can rotate about the non-rotating motor shaft  90 . The retention system  300  further includes the support cable  302  and retention rod  304  for suspending the retainer plate  310  from the structure. The retainer plate  310  can mount to the non-rotating motor shaft  90  and rest below the lower housing portion  230  to provide a redundant support for both the non-rotating and rotating elements of the motor assembly  16 . A wiring harness  340  can extend through the motor shaft  90 , and out through the center of the motor shaft  90  for supplying an electric current to the stator  232 . 
     Looking at  FIG.  2 A , the downrod assembly  14  comprises the hollow rod  30  having an upper end  32  configured to mount to the ceiling via the ceiling mount structure  12  of  FIG.  1   . A lower end  34 , disposed opposite of the upper end  32 , mounts the downrod assembly  14  to the motor assembly  16 . The upper end  32  includes the swivel mount  36  mounted to the hollow rod  30 . The swivel mount  36  can include two extensions  40  defining a clevis with each extension  40  having a mounting aperture  42 . The mounting aperture  42  can be aligned to accept the insertion of a fastener, such as a pin, for pivotally coupling the upper end  32  to the ceiling mount structure  12 . 
     The lower end  34  can include the downrod plate  50  and shaft coupler  52 . The downrod plate  50  can mount to the hollow rod  30 , such as by welding, or can be integral with the hollow rod  30 . The shaft coupler  52  can couple to the downrod plate  50  with a plurality of fasteners  54  such as screws or bolts. The guy wire fitting  58  can be a disk  60  that can secure around the hollow rod  30 , between the upper and lower ends  32 ,  34 , and can have one or more openings  62  for mounting the guy wires  22  of  FIG.  1   . 
     Looking now at  FIG.  2 B , an exploded view shows the separated parts of the downrod assembly  14 . The guy wire fitting  58  can weld to the hollow rod  30 , or can be machined as part of the hollow rod  30 . The guy wire fitting  58  can alternatively include an inner ring  70  and an outer ring  72 , having the openings  62  disposed between the rings  70 ,  72 . The turnbuckles  80  have hooks  82  that can extend through and couple to the outer ring  72  through the openings  62 . The turnbuckles  80  can couple the downrod assembly  14  to the ceiling via the guy wires  22  for providing additional support for the ceiling fan  10  and reducing vibration or gyroscopic movement of the ceiling fan  10  during operation. 
     The downrod plate  50  and the shaft coupler  52  can include a plurality of fastener openings  74  adapted to accept the insertion of the fasteners  54  for coupling the downrod plate  50  and the shaft coupler  52 . The fasteners  54  can thread into one or more of the downrod plate  50  and shaft coupler  52  or can utilize a secondary fastener such as a nut to secure the downrod plate  50  and shaft coupler  52  together. The shaft coupler  52  can be in the form of a collar  76  having a central opening  78 . Looking at  FIG.  2 C , the collar  76  can be threaded to couple to a tapped upper end of the motor shaft  90 , mounting the downrod assembly  14  to the motor assembly  16 . Further, the collar  76  or shaft coupler  52  can be indexed relative to the motor shaft  90 , such as being keyed to receive a keyway  88  on the motor shaft  90 . 
     Alternatively, as seen in  FIG.  2 C , the threaded retainer  92  can be used to secure the shaft coupler  52  to the motor shaft  90 . Utilizing the threaded retainer  92 , in an alternative implementation, the collar  76  can slide over the motor shaft  90  having the retainer  92  thread onto the tapped portion of the motor shaft  90  to secure the shaft coupler  52  to the motor shaft  90 . The retainer  92  can have a diameter sized to fit within an upper opening  96  of the shaft coupler  52 . Complementary to the retainer  92 , an upper collar  95  can be used to secure the motor shaft  90  to the retainer nut  92  redundant to the threads. Additionally, a spring ring  93  can be inserted between the retainer nut  92  and the shaft coupler  52  to provide a biasing force between the two. The biasing force of the spring ring  93  secures the retainer nut  92  to the motor shaft  90 , prevented unwanted rotation of the two that may otherwise lead to unthreading. In another alternative example, both the shaft coupler  52  and the retainer  92  can be threaded to couple to the motor shaft  90 , providing additional support for mounting the downrod assembly  14  to the motor assembly  16 . 
     Alternative to the threaded fasteners  54 , the downrod plate  50  or the shaft coupler  52  can include tapped studs  94  or press studs, while the remaining downrod plate  50  or motor coupler  52  has openings  74  adapted to receive the tapped studs  94 . Nuts or other fasteners can thread or fit onto the tapped studs  94  to secure the downrod plate  50  and motor coupler  52  together. 
     It should be appreciated that the downrod assembly  14  is beneficial in suspending the motor assembly  16  from the ceiling, permitting the use of a non-rotating downrod assembly  14  and a non-rotating motor shaft  90 . The downrod plate  50  in combination with the shaft coupler  52  facilitates connection of the downrod assembly  14  to the motor assembly  16 . Additionally, the guy wire fitting  58  facilitates the connection of additional suspension elements to the downrod assembly  14 , such as guy wiring  22 , reducing vibration or movement associated with operation of the ceiling fan  10 . Additionally, the guy wiring provides an additional redundant suspension system in the event that the ceiling mount structure  12  fails. 
     It should be further appreciated that the tapped studs  94  or press studs facilitate alignment and mounting of the downrod plate  50  to the shaft coupler  52 . Additionally, the use of the retainer nut  92  facilitates slidable insertion of the motor shaft  90  into the shaft coupler  52  as well as can provide a redundant coupling for attaching the motor shaft  90 . 
     Turning now to  FIG.  3 A , a top view of the blade  20  illustrates three mount holes  100  on a first end  102  and a second end  104  opposite of the first end  102 . The mount holes  100  can mount the blade to the motor assembly  16 . The blade  20  can further comprise a blade span  106  as the distance between the first end  102  and the furthest end of the second end  104 . The blade  20  can have an airfoil  110  cross section, as shown in  FIG.  3 B , with a leading edge  112  and a trailing edge  114  defining a chord  116  as the straight line distance between the leading edge  112  and the trailing edge  114 . In one example, the blade chord  116  can be about seven inches (in.) and can be between six and eight inches. The airfoil  110  can be non-symmetrical and can have an interior chamber  117 . 
     The blade  20  can further include a pressure side  118  and a suction side  120 , having the pressure side  118  facing toward a ground surface below the ceiling fan  10  and the suction side  120  facing the ceiling from which the ceiling fan  10  is mounted. A blade thickness  122  can be the greatest distance between the pressure side  118  and the suction side  120 . The blade  20 , as see in  FIG.  3 C , can also be two-part, being the combination of a leading member  130  and a trailing member  132  coupled together. 
     The blade thickness  122  can be adapted such that a thickness to chord ratio can be less than 0.14 and can be greater than 0.13. For example, the blade chord  116  can be 7.01 inches and the thickness  122  can be 0.97 inches having a thickness-to-chord ratio of 13.8% or 0.138. The blade chord  116  and thickness  122  can be changed relative to one another to maintain the thickness-to-chord ratio of about 13.8%. Furthermore, the blade  20  can adapted to rotate at a rotational speed defined by revolutions per minute (rpm). Rotational speed of the blade  20  can be dependent on the blade span  106  or total ceiling fan width. The total ceiling fan width can be the diameter defined by a circle defined by the outermost rotation of the blades  20 . In one example, fan  10  can have a total width of 24 feet having blade spans  106  of about 12 feet, a chord  116  of 7.01 inches, and a thickness  122  of 0.97 inches. The exemplary fan  10  can be adapted to rotate at a particular rotational speed to generate a particular volumetric flow rate or air speed 
     It should be understood that the dimensions of the blade span  106 , total fan width, blade chord  116 , and blade thickness  122  rotating at a determined rotational speed can be determinative of the maximum wind speed generated by the fan as well as volumetric flow rates. Alternatively, the wind speeds generated by the fan  10  can be determined based upon consumer preference, which can be determined by the need for fan-driven airflow. For example, a hotter or more stagnant environment will require a greater wind speed to maintain appropriate temperatures, while a cooler or open environment will require less wind speed to maintain temperatures. It can be appreciated, adapting the span  106 , chord  116 , thickness  122 , chord-to-thickness ratio, rotational speed, or otherwise can maximize efficiency of the fan  10 , by improving temperature management, volumetric airflow, or airspeed while minimizing energy consumption. 
     It should be appreciated that the blades  20  have a thickness-to-chord ratio of about 13.8% and include an airfoil shape to maximize efficiency of the blades  20 . The blade span  106 , chord  116 , thickness  122 , rotational speed, and pitch can be adapted to maximize efficiency, airspeed, and airflow volume during operation of the ceiling fan  10 . 
     Turning to  FIG.  4 A , focusing on the blade holder  18 , the blade holder  18  includes a first end  150  and a second end  152  opposite of the first end  150 . The first end  150  can have a first cross section, such as circular cross-section  140  and the second end  152  can have second cross-section, such as elliptical cross section  142 . The first and second cross sections  140 ,  142  can be different from one another, while it is also contemplated that they can be the same. Further, the height of the first cross-section  140  can be greater than that of the height of the second cross-section  142 . The cross-sections  140 ,  142  can each define a cross-sectional area for the first and second ends  150 ,  152 . The cross-sections  140 ,  142  can have the same area, while the shapes are different. Alternatively, the cross-sectional areas for the shapes can differ. The first and second ends  150 ,  152  can connect by a transition section  154 . The transition section  154  can have a cross-section  144  transitioning from the first cross-section  140  to the second cross-section  142 , such as transitioning from the circle to the ellipse. 
     The blade holder  18  can comprise a single machined piece, or can be a combination of multiple parts, such as welding the first and second ends  150 ,  152  to the transition section  154 . The second cross-section  142  can be formed by stamping from an initial shape. For example, the entire blade holder  18  can be machined having a circular cross-section. The second end  152  and part of the transition section  154  can be stamped or compressed to form the appropriate second cross-sections  142 ,  144 . 
     The first end  150  can have a push-lock assembly  156  closing the first end  150 . The motor assembly  16  having the rotating blade hub, can have a first receiver which can comprise the blade hub of  FIG.  5 A . The second end  152  can have mounting apertures  158  complementary to the mount holes  100  of the blades  20  such that the second end  152  is received within the interior chamber  117  of the blade  20  operating as a second receiver. Thus, the blade  20  can couple to the motor assembly  16  utilizing the blade holder  18 . The interconnection between the blade  20 , blade holder  18 , and blade hub are further described below during the discussion of  FIG.  5 B . 
     The first end  150  includes an opening  160  for receiving the push-lock assembly  156 . The push-lock assembly  156  can further include an index  157  having a biased detent, such as a spring-loaded pin  162  extending radially from one side of the push-lock assembly  156 . Turning to  FIG.  4 B , illustrating the push-lock assembly  156  exploded from the body of the blade holder  18 , the push-lock assembly  156  mounts to the first end  150  at the opening  160 , such as by welding, and can mount relative to the blade holder  18  to orient the blade holder  18  at an angle relative to the pin  162 . For example, the second cross-section  142  at the second end  152  can define a major axis  164 . The push-lock assembly  156  can mount to the first end  150  to orient the pin  162  at an angle of five degrees offset from the major axis  164 . Thus, a blade  20  mounted to the second end  152  can be disposed at an angle offset by five degrees from the pin  162  and can define a pitch for the blades  20  upon mounting the blade holder  18  to the motor housing  198 . The pitch is the angle of attack of the blades  20  into the air to control the production of a flow of air through which the blades  20  sweep. 
     Looking at  FIG.  4 C , an exploded view illustrates the components included with the push-lock assembly  156 . The push-lock assembly  156  includes a body  170  having an interior  172 . The interior  172  is defined by a top  174  and a bottom  176  of the body  170 , having two shelves  178  disposed between the top  174  and bottom  176  on either side of the interior  172 . Each shelf  178  includes a fastener aperture  180 . The top  174  includes a circular extension  182  adapted to be received at the opening  160  of the first end  150  for mounting thereto. An internal body  184  is sized to be received within the interior  172  of the body  170 . A pin interior  186  is disposed in the internal body  184  for receiving insertion of the pin  162 . The pin  162  includes a pin extension  163 . Insertion of the pin  162  into the pin interior  186  and insertion of the internal body  184  into the interior  172  positions the pin  162  extending out through the opposite end of the body  170  as shown in  FIG.  4 B . A plate  188  positioned behind the internal body  184  secures a spring  190  behind pin  162  within the internal body  184 . The spring  190  is positioned around the pin extension  163  and sandwiched between the pin  162  and the plate  188 . The pin extension  163  has an arcuate surface shaped to abut the plate  188 . The arcuate surface of the pin extension  163  and a concave inner end  189  of the plate  188  provides for slight movement of the pin  162  beyond straight linear movement. This facilitates insertion of the pin  162  into the mounts  204  on the motor housing  198  during installation of the blade holders  18 . Additionally, the arcuate outer surface  191  of the plate  188  is complementary to the body  170  form a cylindrical outer surface for the push-lock assembly  156 . Fasteners  192 , such as screws can insert into second fastener apertures  194  within the plate  188  for mounting the plate  188  at the shelves  178 , securing the spring  190  behind the pin  162  within the body  170 , forming the completed push-lock assembly  156  seen in  FIG.  4 B . The spring  190  permits actuation of the pin  162  for coupling the blade holder  18  to the motor assembly  16  with the push-lock assembly  156 . 
     It should be appreciated that the blade holders  18  facilitate mounting of the blades  20  to the motor assembly  16 . The size and shape of the blade holders  18  minimizes system weight while maximizing structural integrity, which improves overall efficiency. For example, the blade holder  18  can be thin walled steel to achieve the minimal weight and maximum integrity. The blade holders  18 , including the push-lock assembly  156  with the pin  162 , determines the blade pitch. Thus, based upon blade features such as span, the push-lock assembly  156  can be manufactured to orient the blades  20  at an optimal pitch to maximize efficiency without requiring such a determination by an installer or consumer. 
       FIG.  5 A  shows the upper portion  200  of the rotatable motor housing  198  comprising a portion of the outer shell for the motor assembly  16 . The upper portion  200  further comprises a blade hub  202  having a central hub  203  integral with the rotatable motor housing  198 . Upper portion  200  includes five mounts  204  for receiving the blade holders  18  to mount the blades  20 . While five mounts  204  are shown, any number of mounts  204  are contemplated. The upper portion  200  further includes a plurality of mounting apertures  206  for mounting to a lower portion (see  FIG.  6   ) and has a central aperture  208  for mounting the motor assembly  16  to the downrod assembly  14  at the shaft coupler  52  of  FIG.  2 B or  2 C . 
       FIG.  5 A  also shows a close-up view of one mount  204 . The mount  204  includes a split sleeve  210  defining a sleeve interior  212 . The split sleeve  210  has two sets of compression fittings  214  for tightening or loosening the split sleeve  210 . The split sleeve  210  and compression fittings  214  are integrally formed with the rotatable motor housing  198 . The split sleeve  210  further includes a slit  216  extending along one side of the longitudinal length of the mount  204 . The slit  216  terminates at a pin-lock aperture  218  and is sized to accept slidable insertion of the pin  162  of the push-lock assembly  156  of  FIGS.  4 A- 4 C . The pin-lock aperture  218  operates as a blade rotation stop to prevent rotation of an attached blade  20  about a longitudinal axis, which could otherwise change the blade pitch during operation. 
     Turning to  FIG.  5 B , for connection of the blade  20  to the motor assembly  16  via the blade holder  18 , the push-lock assembly  156  is mounted on the first end  150  of the blade holder  18  having the pin  162  oriented at an angle to determine the pitch of the blade  20 . The mount  204  can be a first receiver for receiving the first end of the blade holder  18 . The pin  162  slides into the slit  216  and inboard of the compression fittings  214 , depressing the pin  162  within the push-lock assembly  156 . The first end  150  slides into the sleeve interior  212  unit the pin  162  is received within the slit  216  by rotating the blade holder  18 . After rotating, the blade holder  18  is moved inwardly until the pin  162  is received in the pin-lock aperture  218  and the spring  190  pushes the pin  162  outwardly, locking the blade holder  18  to the mount  204 . Alternatively, the blade holder  18  can be fully inserted into the mount  204  and rotated until the pin  162  is received in the pin-lock aperture  218 . Fasteners (not shown), such as a screw or bolt, insert into the compression fittings  214  of the mount  204 , tightening the compression fittings  214  of the split sleeve  210  to secure the blade holder  18  to the mount  204  and to prevent the pin  162  from sliding out of the pin-lock aperture  218 . 
     After insertion of the blade holder  18  into the motor housing  198 , the disposition of the pin  162  based upon mounting to the index  157  fixes the rotation of the circular first cross-section  140  and orients the second end  152  of the blade holder  18  at an angle relative to a horizontal plane, which can be defined, for example, relative to the horizontal plane such as the ceiling or floor of the structure to which the fan  10  mounts. Alternatively, the pin  162  can orient the blade  20  relative to the blade hub  202 . 
     The blade  20  can be a second receiver for receiving the second end  152  of the blade holder  18 , having the second receiver located within the interior of the blade  20 . The blade  20  can mount to the blade holder  18  sliding the blade  20  over the second end  152  and into the interior chamber  117 , and aligning the mount holes  100  with the mounting apertures  158 . Fasteners can secure the blade  20  to the blade holder  18  by utilizing mount holes  100  and mounting apertures  158 . The angular disposition of the second end  152 , based upon the orientation of the pin  162  and the push-lock assembly  156  defines the pitch of the blade  20 . For example, positioning the pin  162  at five degrees offset from the major axis  164  of the ellipse of as shown in  FIG.  4 B  can orient the pitch of the blade  20  at five degrees relative to the ceiling or floor of the structure. 
     During operation, a torque generated by the motor assembly  16  can define the rotational speed for the fan  10 . The rotational speed of the fan  10  in combination with the blade pitch can determine a volumetric flow rate for air movement by the fan  10 . The volumetric flow rate can be the volume of air moved by the fan  10  during operation based upon the motor torque and the blade pitch. The blade span  106  can proportionally increase or decrease the volumetric flow rate, as a longer blade  20  generates greater airflow and a shorter blade  20  generates less. However, greater motor torque is required to drive a longer blade  20  at the desired rotational speed as compared to a shorter blade. In order to maximize flow rates while operating within the capabilities of the motor to generate torque, the blade pitch can be predetermined during manufacture based upon the span  106  of the blades  20 . For example, for a blade span  106  of about 12 feet or a total diameter of 24 feet, the pin  162  can be oriented to define a blade pitch of 8 degrees, while a blade span  106  of about 6 feet or total diameter of 12 feet can have a blade pitch of 12 degrees. Thus, the fan having a smaller area through which the blades sweep can have a greater pitch to drive a greater volume of airflow within the motor operational capabilities. It should be understood that the blade spans, fan diameters, and blade pitches as described are exemplary, illustrating that the blade pitch can be determined by fan diameter in order to maximize volumetric airflow or airspeed based upon operational capabilities of the motor. 
     Thus, mounting the push-lock assembly  156  to orient the pin  162  at the predetermined blade pitch angle can facilitate orienting the blades  20  at a pitch based upon the blade span  106  to maximize volumetric flow rate within motor torque capabilities. As such, the need for a consumer or installer to determine the proper pitch or attempt to properly orient the blades  20  at a pitch to maximize flow rate is eliminated. This elimination is due to supplying each fan blade  20  with a corresponding blade holder  18  having the predetermined blade pitch angle. It should be understood that the pitch is independent of the blade span  106 . The pitch can be any angle and the blade span  106  can be any length. It should be appreciated, however, that determining pitch based upon span  106  is beneficial to maximizing volumetric airflow based upon capabilities of the motor such as torque. 
     It should be appreciated that the blade hub  202  facilitates attachment and improves security of the blade holders  18 . The split sleeve  210  and pin-lock aperture  218  accurately aligns blade pitch among all mounted blades  20 . The compression fittings  214  secure the blade holders  18  to the blade hub  202  with easy tightening of mechanical fasteners. The integral mounts  204  with the rotating blade hub  202  enables rotational operation without requiring additional elements for rotating the blades  20 . 
       FIG.  6    illustrates an exploded view of the motor assembly  16  comprising the upper portion  200  of the motor housing  198  and the lower portion  230  of the motor housing  198  for encasing the stator  232  and rotor  234 . The stator  232  can including a coil winding of conductive material and the rotor  234  can include a plurality of magnets  240 . Alternatively, the stator  232  can include the magnets  240  and the rotor  234  can include a winding. The upper and lower portions  200 ,  230  can couple and rotate together to define the rotating motor housing  198 . The upper and lower portions  200 ,  230  can further include a magnet seat  238  as an annular surface for supporting the plurality of magnets  240  mounted to the rotor  234  or forming a portion of the rotor  234 . The magnet seat  238  can include complementary channels formed in each of the upper and lower portions  200 ,  230  of the motor housing  198  to collectively form the magnet seat  238 . The magnets  240  can be permanent magnets or an electromagnet comprising a motor winding. The rotor  234  and upper and lower portions  200 ,  230  can have a plurality of mount holes  242  for mounting the rotor  234  to motor housing  198  utilizing, for example, mechanical fasteners such as a screw or bolt. The upper and lower portions  200 ,  230  can each have an edge  243 . The horizontal edges  243  can abut one another when mounting the upper and lower portions  200 ,  230 . Alternatively, the upper and lower portions  200 ,  230  can be space by a gap (not shown) between the edges  243 , exposing a portion of the rotor  234  through the gap. 
     During operation, electric current is provided to the stator  232  causing the rotor  234  to rotate about the stator  232 . By mounting the rotor  234  to the upper and lower portions  200 ,  230 , the motor housing  198  can rotate about stator  232 , rotating any blade holders  18  and blades  20  attached thereto. 
     It should be appreciated that the motor housing  198  is a clamshell style housing having upper and lower portions  200 ,  230  for mounting directly to the rotor  234  for rotating the entire motor housing  198 , blade hub  202 , and blades  20  coupled thereto. The motor housing  198  enables a rotor  234  and stator  232  combination to be housed within the motor assembly  16  suspended from the downrod assembly  14  without requiring a motor assembly  16  to be completely rotationally mounted. Operational wear, vibration, and wobble are minimized while lifetime is increased. 
     Referring now to  FIG.  7 A , an alternative motor assembly  400  is illustrated including a rotatable housing portion  402  having an upper portion  404  and a lower portion  406  forming the rotatable housing portion  402 . A rotating blade hub  408  is included on the rotatable housing portion  402  and can be integral with the upper portion  404 . At least one blade mount  410  is provided on the blade hub  408 , such as five blade mounts  410  in one example. Each blade mount  410  includes a pin aperture  412  and at least one fastener aperture  414 . The pin aperture  412  can be substantially similar to the pin-lock aperture  218  of  FIG.  5 A , in one example. 
     The blade mounts  410  can define a substantially cylindrical cavity  420 . A channel  422  can be formed in the blade mounts  410  such that the cavity  420  includes an enlarged portion  424  at the channel  422 . In one example, the channel  422  can be used to guide the pin  162  toward the pin aperture  412  for locking the blade holder  18  to the motor assembly  400  at the blade mount  410 . 
     The fastener apertures  414  can each include an inserted fastener  432 . The fastener  432 , for example, can be any suitable fastener, such as a setscrew or grub screw. The fastener apertures  414  are disposed in a face  434 . The fastener apertures  414  extend from the face  434  through the blade mounts  410  to the cavity  420 . Additionally, a plurality of housing fasteners  436  can be used to secure the upper portion  404  to the lower portion  406 , as well as securing a rotor through mount holes similar to that of  FIG.  6   . 
     Referring now to  FIG.  7 B , an exploded view illustrates a set of two fasteners  432  and two saddles  430 . The fastener  432  and the saddle  430  can be separate or integral, or coupled permitting rotation of the fastener  432  without rotating the saddle  430 . The saddles  430  include a curved surface  438  opposite of the fastener  432  and a post  439 . The fastener  432  can have a hollow interior  437 , adapted to receive the post  439  and enabling rotation of the fastener  432  about the post  439 . 
     The face  434  can be offset from a vertical axis  416  at an angle  418  from a face axis  419 . The angle  418  can be any suitable angle, such as 20 degrees in one non-limiting example, in order to align the fastener apertures  414  radially to the center of the cavity  420 . Furthermore, the angled face  434  provides easy access to the fasteners  432  in the fastener apertures  414  by a user. 
     Referring now to  FIG.  7 C , in operation, the user can tighten or loosen the saddle  430  within the cavity  420  by tightening or loosening the fastener  432 . A user inserts the blade holder  18 , such as that of  FIG.  5 B , into the blade mount  410 . The pin  162  on the blade holder  18  aligns along the channel  422  and the blade holder  18  inserts until the pin  162  secures in the pin aperture  412 . 
     After insertion of the blade holder  18 , the fastener  432  can be used to tighten the saddle  430  against the first end  150  of the blade holder  18  inserted within the blade mount cavity  420 . The tightened saddle  430  abuts the blade holder  18  at the curved surface  438  to apply pressure to the first end  150  of the inserted blade holder  18  to provide a secondary securing means for the blade holder  18 . 
     The saddle  430  is oriented at the angle  418 , such as the 20-degree angle, as defined by the face  434 , and can orient the saddle  430  radially from the center of the blade holder  18 . The radial orientation of the saddle  430  against the inserted blade holder  18  prevents rotation of the blade holder  18  based upon the insertion force from the saddle  430 . This radial insertion further prevents rotational movement of the pin  162  inserted within the pin aperture  412  against the blade mount  410 , which can tend to otherwise crack the blade holder  18 . 
     It should be appreciated that the motor assembly  400  and the blade hub  408  can be substantially similar to the motor assembly  16  and blade hub  202  of  FIG.  5 B , for accepting the insertion of a blade holder  18  for coupling the blade  20  to the motor assembly  400 . The saddles  430  provide for a secondary retention system for the blade hub  408 , as well as can reduce vibration, noise, or wobble of the ceiling fan, which can increase overall fan efficiency. 
       FIG.  8 A  is one example of the non-rotating motor shaft  90 . The motor shaft  90  includes an upper end  252  and a lower end  254  having a hollow interior  256 . The exterior surface of the upper end  252  includes a threaded connection  258  for coupling a collar which can include the shaft coupler  52  of  FIG.  2 B , the retainer nut  92  of  FIG.  2 C , or a combination of both. A keyed recess  260  can be disposed at the upper end  252  for alignment with the shaft coupler  52  at coupling. The motor shaft  90  can further include an upper collar  262  and a lower collar  264 , with the upper collar  262  having an increased outer diameter and the lower collar  264  having a further increased outer diameter, being greater than that of the upper collar  262 . The upper collar  262  includes a step-wise increase in outer diameter for the motor shaft  90  defining an annular upper bearing stop  266 . The upper collar  262  further includes a wiring opening  269 . The lower collar  264  includes a further step-wise diameter increase from the upper collar  262 , defining a stator stop  268  for supporting the stator winding  232 . Underneath the lower collar  264  is a step-wise decrease in diameter defining a lower bearing stop  270 . 
     As shown in  FIG.  8 B , the upper and lower bearings  272 ,  274  are disposed on the upper bearing stop  266  and the lower bearing stop  270 , respectively. The upper and lower bearing stops  266 ,  270  are formed within the motor shaft  90  for positioning the bearings  272 ,  274  against the motor shaft  90  and permitting rotation of the motor housing  198  about the non-rotating motor shaft  90 . 
     Looking at  FIG.  8 C , showing a cross-section of a portion of the motor assembly  16  illustrates the combination of the components associated with the non-rotating motor shaft  90 . The non-rotating motor shaft  90  is disposed within the motor housing  198  having the bearings  272 ,  274  disposed in the upper and lower bearing stops  266 ,  270 . A spacer  280  can be placed between the upper bearings  272  and the stator providing additional support during operation. The stator  232  rests on the stator stop  268  and fixes the position of the stator  232  relative to the motor shaft  90 . The rotor  234  surrounds the stator  232  and mounts between the upper portion  200  of the motor housing  198  and the lower motor housing portion  230  on the magnet seat  238 . Fixing the stator  232  on the stator stop  268  fixes the position of the stator  232  relative to the rotor  234  to fix the air gap between the two. The upper portion  200  further includes an upper bearing seat  284  abutting the upper bearing  272  above the upper bearing stop  266 . The lower portion  230  further comprises a lower bearing seat  286  abutting the lower bearing  274  below the lower bearing stop  270 . The upper and lower bearing seats  284 ,  286  operate to sandwich the bearings  272 ,  274  between the upper and lower bearing stops  266 ,  270 , respectively, fixing the bearings in place during operation. During operation, rotation of the rotor  234  about the stator  232  rotates the motor housing  198  and the blade holders  18  attached thereto, rotating the blades  20  of the ceiling fan  10 . 
     The shaft coupler  52  mounts to the upper end  252  of the motor shaft  90 , such as by the threaded connection  258 . The shaft coupler  52  couples to the downrod plate  50 , utilizing the fasteners  54  or press studs. The downrod plate  50  couples to the downrod assembly  14  or is integral with the downrod assembly  14 , mounting the downrod assembly  14  to the motor shaft  90  via the shaft coupler  52 . Thus, the downrod assembly  14  suspends the motor shaft  90  from the structure or ceiling. During operation, the rotor  234 , motor housing  198  including the upper and lower portions  200 ,  230 , the mounts  204 , blade holders  18 , and blades  20  can all rotate about the motor shaft  90  around the bearings  272 ,  274  while the motor shaft  90 , stator  232 , downrod plate  50 , motor coupler  52 , and downrod assembly  14  remain fixed and are non-rotating. 
     The motor shaft  90  can further include a weep hole  288 . The weep hole  288  can be disposed below the opening  269 , as electrical wiring can be provided through the opening  269 . In operation, such as in weather heavy environments where rain, snow, or precipitation is common, such as in a farming environment, the weep hole  288  can protect the wiring at the opening  269 . In one example, rain may run into the interior of the motor shaft  90 . The motor shaft  90  can fill with the rainwater. The weep hole  288  provides for draining of the rainwater from the interior of the motor shaft  90  before the water can rise to the electronics, providing for outdoor or weathered operation of the ceiling fan. 
     The motor assembly  16  further includes one or more spring members  282 , such as a spring or spring finger, disposed underneath the lower bearings  274  between the lower bearings  274  and the lower motor housing portion  230  permitting rotation of the spring member  282  with the rotation of the lower motor housing portion  230 . The spring members  282  provide a downward force against the lower portion  230  of the motor housing  198  at the lower bearing seat  286 , which is transferred to the upper housing portion  200 , providing a downward force by the upper motor housing portion  200  against the upper bearings  272  at the upper bearing seat  284 . During operation, the blades  20  push a volume of air downward, also providing an upward force for the motor assembly  16 . The spring members  282  providing a balancing force to combat the forces generated during operation maintaining fan balance. Thus, the weight of the rotor  234 , mounted to the motor housing  198 , is transferred through the upper bearing  272  to the motor shaft  90  and is not borne by the motor housing  198  alone. 
     It should be appreciated that the non-rotating motor shaft  90  facilitates coupling of the motor assembly  16  to the downrod assembly  14 . The motor shaft  90 , including the upper bearing stop  266 , stator stop  268 , and the lower bearing stop  270 , facilitates alignment of the bearings  272 ,  274  and operates in combination with the motor housing  198  to secure the bearings in place between the stops  266 ,  268  and the bearing seats  284 ,  286  to reduce vibration and movement, such as wobble of the fan  10  during operation while permitting a rotating motor housing  198 . The bearing stops  266 ,  270  and the stator stop  268  fix the positions of the bearings  272 ,  274  and stator  232  relative to the motor housing  198  and the rotor  234 . Mounting the rotor  234  to the motor housing  198  fixes the rotor  234  relative to the stator  232 , bearings  272 ,  274 , and the motor shaft  90 . Fixing these positions fixes an air gap between the stator  232  and rotor  234 , determining operational efficiency of the motor while maintaining stability during operation. 
     Additionally, the spring member  282  creates a preload against the lower portion  230  of the motor housing  198  to equalize position of the rotating motor housing  198  during operation, which further reduces vibration and movement of the fan  10 . 
     Looking now at  FIG.  9 A , the retention system  300  includes the support cable  302  coupled to the retaining rod  304  by a fastener  306 . The support cable  302  can mount to a ceiling or a structure, such that the retention system  300  can provide a redundancy to prevent falling or collapse of the ceiling fan  10  in the event that the initial ceiling mount structure  12  fails. The fastener  306 , for example, can be a bolt having an aperture  307  for securing with a pin  308 , or alternatively, can be a screw and nut system. Opposite of the support cable  302 , the retaining rod  304  can couple to the retainer plate  310  which includes an outer portion  312  and an inner portion  314 . The inner portion  314  includes an offset opening  316  for accepting insertion of the retaining rod  304 . The inner portion  314  has mounting holes  318  for mounting to the motor shaft  90 . 
     In  FIG.  9 B , an exploded view illustrates the interconnection of the retention system  300 . A mount end  320  of the retaining rod  304  can insert through the opening  316  in the retainer plate  310 , with the opening  316  shaped to accept the shape of the mount end  320 . The mount end  320  can include a flattened surface with a mount hole  322  adapted to be received by a clevis  324  on one end of the support cable  302 . The retaining rod  304 , opposite of the mount end  320 , includes a cap  326  that abuts the bottom of the retainer plate  310 . The bottom of the retainer plate  310  includes a recessed portion (see  FIG.  11 A ) adapted to receive the cap  326 . 
     It should be appreciated that the retention system  300  provides a redundancy in the event that the initial ceiling mount structure  12  fails. The retaining rod  304  disposed within the downrod assembly  14  and the motor shaft  90  coupled to the retainer plate  310  can permit continued rotation of the fan  10  during such a failure event. The continued rotation allows the fan  10  to slow down without further damage to internal components as well as supporting the fan  10  from falling. Without the ability for continued rotation, the internal components can otherwise contact one another, damaging the fan  10 , its components, or otherwise causing the fan  10  to fall despite redundant measures to prevent such a fall. 
     Turning to  FIG.  10 A , the wiring harness  340  is illustrated having the wiring conduit  342 , a body  344 , and electrical wiring leads  346 . The wiring conduit  342  extends from the body  344 , electrically coupling the body  344  to a structure power supply. The wiring leads  346 , which can comprise live wires  348  and a ground wire  350  electrically couple to the stator  232  for powering the stator  232  to drive the rotor  234  during operation of the ceiling fan  10 . It should be appreciated that the wiring harness  340  separates the ground wire  350  from the live wires  348  preventing the potential for a short. 
     Looking at  FIG.  10 B , the wiring harness  340  can slide into the stator  232 . The wiring harness  340  can terminate at the electrical connector  343  facilitating plug-in connection of the wiring harness  340  during installation of the fan  10 . The stator  232  can have a central aperture  360  having a slot  362  sized to receive the body  344  of the wiring harness  340 . Inserting the body  344  into the slot  362  positions the wiring leads  346  along the bottom of the stator  232  to provide power to the stator  232 . 
     Similarly, the opening  269  of the motor shaft  90  is sized to receive an end  364  of the body  344 , permitting the wiring conduit  342  to extend through the interior  256  of the motor shaft  90 . Thus, the wiring conduit  342  can extend through the interior  256  of the motor shaft  90 , having the end  364  inserted in the opening  269 . The combined motor shaft  90  and wiring harness  340  can be inserted into the stator  232 , having the extending body  344  of the wiring harness  340  inserted into the slot  362  of the stator  232 , providing the wiring leads  346  to the stator  232 . 
     It should be appreciated that the wiring harness  340  provides a power source to the stator  232  internal of and through the non-rotating motor shaft  90 . Additionally, the disposition of the motor shaft  90  and the retainer system  300  separates the retaining rod  304  from the wiring harness  340 , minimizing the possibility for electrical shorts or wear during operation by rubbing the two together. 
     Looking at  FIG.  11 A , a cross-sectional view illustrates the combined motor shaft  90 , retention rod  304 , retainer plate  310 , and wiring harness  340 . The retainer plate  310  mounts to the motor shaft  90  by aligning the mounting holes  318  with complementary fastener apertures  370  within the motor shaft  90 . The offset orientation of the opening  316  within the retainer plate  310  positions the retaining rod  304  toward one side of the interior  256  of the motor shaft  90 . The retainer plate  310  mounts to the motor shaft  90  positioning the opening  316  of the retainer plate  310  on an opposite side as the opening  269  within the motor shaft  90 . As such, the wiring harness  340  positions on the opposite side of the interior  256  of the motor shaft  90  from the retaining rod  304 , spacing the two from one another and preventing any potential contact, which might otherwise short the wiring harness  340  or wear against one another during operation. 
     Turning to  FIG.  11 B , the combination of the motor assembly  16  can be appreciated. From the bottom, the retaining rod  304  inserts through the retainer plate  310  until the cap  326  abuts the inner portion  314  of the retainer plate  310 . The inner portion  314  mounts to the bottom of the motor shaft  90 , through an aperture  380  in the lower motor housing portion  230 . The motor shaft  90  is non-rotating, and therefore the retainer plate  310  is non-rotating and is spaced from the lower motor housing portion  230  to permit rotation of the motor housing portion  230  during operation. The wiring harness  340  inserts into the opening  269  of the motor shaft  90 , having the wiring conduit  342  extending up through the interior  256  of the motor shaft  90 . The lower bearings  274  position at the lower bearing stop  270 , fixing the lower bearings  274  between the motor shaft  90  and the lower bearing seat  286 . The spring members  282  ( FIG.  8 C ) can be positioned between the bottom of the lower bearings  274  and the lower motor housing portion  230  providing a downward force upon the lower motor housing portion  230 . The rotor  234  and stator  232  can position around the motor shaft  90 , resting the rotor  234  on the magnet seat  238  of the lower housing portion  230  and resting the stator  232  on the stator stop  268  of the motor shaft  90 . The upper bearings  272  can position on the upper bearing stop  266 , having the upper bearing seat  284  fixing the upper bearings  272  against the motor shaft  90 . The upper housing portion  200  can mount to the lower housing portion  230  with a plurality of fasteners through the rotor  234 , encasing the rotor  234 , stator  232 , motor shaft  90 , bearings  272 ,  274 , and wiring harness  340 . The support cable  302  can be coupled to the mount end  320  of the retaining rod  304  extending through the top of the upper motor housing portion  200  at the clevis  324 . The shaft coupler  52  is disposed around the support cable  302  and couples to the motor shaft  90 . The shaft coupler  52  can mount to the downrod plate  50 , suspending the motor assembly  16  from the downrod assembly  14  and the structure. 
     In operation, a power supply is provided to the stator  232  via the wiring harness  340 , inducing rotation of the rotor  234 . The rotor  234  couples to the motor housing  198  and rotates about the stator  232 , rotating the blade holders  18  and the blades  20  attached thereto. 
     It should be appreciated that the ceiling fan  10  as described herein provides a number of advantages. These advantages can be combined into one embodiment or utilized individually in any particular embodiment. The following are examples of some of the advantages. The downrod assembly  14  utilizes the downrod plate  50  to mount to the shaft coupler  52  for mounting to the motor shaft  90 . The combination of the downrod plate  50  and shaft coupler  52  facilitates mounting of the downrod assembly  14  to the motor shaft  90  for suspending the motor assembly  16  from the ceiling. Additionally, the downrod plate  50  and shaft coupler  52  permit the motor shaft  90  to be non-rotating without requiring the downrod assembly  14  or the entire motor assembly  16  to rotate. Furthermore, the downrod assembly  14  includes the guy wire fitting  58  for mounting the downrod assembly  14  to the ceiling separate from the initial ceiling mount structure  12 . Additionally, the non-rotating nature of the downrod assembly  14  facilitates the mounting of the guy wire fitting  58  directly to the downrod assembly  14  without requiring a separate non-rotating element for mounting to guy wires  22 . The guy wiring system provides a redundancy in the event the fan  10  can fall from ceiling mount structure as well as reduces operational vibration and gyroscopic tilt. 
     Furthermore, the tapped studs  94  or press studs facilitate alignment and mounting of the downrod plate  50  to the shaft coupler  52 . The studs  94  permit the downrod assembly  14  to quickly mount to the motor shaft  90  via the shaft coupler  52 . Additionally, the use of the retainer nut  92  facilitates slidable insertion of the motor shaft  90 , into the shaft coupler  52  as well as can provide a redundant coupling for attaching the motor shaft  90  to the shaft coupler  52 . 
     Further still, the blades  20  can have a thickness-to-chord ratio of about 13.8% and include an airfoil shape to maximize efficiency of the blades  20 . Furthermore, the blade span  106 , chord  116 , thickness  122 , rotational speed, and pitch can be adapted to maximize efficiency, airspeed, and airflow volume during operation of the ceiling fan  10 . 
     Further still, the blade holders  18  including the cross-sections  140 ,  142  at the first and second ends  150 ,  152  facilitating mounting of the blades  20  to the mounts  204 . The size and shape of the blade holders  18  minimizes system weight while maximizing structural integrity, which improves overall efficiency. The blade holders  18  include the push-lock assembly  156  with the pin  162 , which determines the blade pitch. Thus, based upon blade features such as span, the push-lock assembly  156  can be manufactured to orient the blades  20  at an optimal pitch to maximize efficiency without requiring such a determination by an installer or consumer. 
     Further still, the blade hub  202 , having multiple mounts  204 , facilitates attachment and improves security of the blade holders  18 . The split sleeve  210  and pin-lock aperture  218  accurately aligns blade pitch among all mounted blades  20 . The compression fittings  214  facilitate securing the blade holders  18  to the blade hub  202  with tightening of mechanical fasteners. The integral mounts  204  with the rotating blade hub  202  enables rotational operation without additional elements for rotating the blades  20 . 
     Further still, the motor housing  198  is a clamshell style housing having upper and lower portions  200 ,  230  for mounting directly to the rotor  234  for rotating the entire motor housing  198 , blade hub  202 , and blades  20  coupled thereto. The motor housing  198  enables a rotor  234  and stator  232  combination to be housed within the motor assembly  16 . Thus, the motor housing  198  can rotate to drive the blades  20  without requiring rotation of the entire motor assembly  16 . Operational wear, vibration, and wobble are minimized while lifetime is increased. 
     Further still, the non-rotating motor shaft  90  facilitates coupling of the motor assembly  16  to the downrod assembly  14 . The motor shaft  90 , including the upper bearing stop  266 , stator stop  268 , and the lower bearing stop  270  facilitates alignment of the bearings  272 ,  274  and operates in combination with the motor housing  198  to secure the bearings in place between the stops  266 ,  268  and the bearing seats  284 ,  286  to reduce vibration and wobble of the fan  10  during operation while permitting a rotating motor housing  198 . The stator stop  268  in combination with mounting the rotor  234  to the motor housing  198  fixes the air gap between the stator  232  and the rotor  234  to determine operational efficiency and maintain operational stability of the motor assembly  16 . Additionally, the spring member  282  creates a preload against the lower portion  230  of the motor housing  198  to equalize position of the rotating motor housing  198  during operation, which further reduces vibration and wobble of the fan  10  as well as offsets the upward force generated by rotation of the fan blades  20 . 
     Further still, the retention system  300  provides a redundancy in the event that the initial ceiling mount structure  12  fails. The retaining rod  304  disposed within the downrod assembly  14  and the motor shaft  90 , coupled to the retainer plate  310  permits continued rotation of the fan  10  during such a failure event. The continued rotation allows the fan to slow down without further damage to internal components as well as supporting the fan  10  from falling. Without the ability for continued rotation, the internal components can otherwise contact one another, damaging the fan  10 , its components, or otherwise causing the fan  10  to fall despite redundant measures to prevent such a fall. 
     Further still, the wiring harness  340  provides a power source to the stator  232  internal of and through the non-rotating motor shaft  90 . Additionally, the disposition of the motor shaft  90 , and the retainer system  300  separates the retaining rod  304  from the wiring harness  340 , minimizing the possibility for electrical shorts or wear during operation by rubbing the two against one another. 
     Further still, the combination of elements provides for utilizing a non-rotating motor shaft  90  with a non-rotating downrod assembly  14 , having the motor assembly  16  suspended from the downrod assembly  14 . The combination of elements disclosed herein maximizes fan efficiency, while providing redundancies in the event that the fan  10  might fall, which can occur in an industrial environment due to typical industrial operations, which can hit the fan  10 . Furthermore, the fan  10  as disclosed facilitates installation having easily interconnectable elements. Additionally, the overall vibration and wobble of the fan  10  is reduced, further increasing efficiency while minimizing noise and power consumption. 
     Referring now to  FIG.  12   , another exemplary ceiling fan  510  is illustrated. The ceiling fan  510  includes a motor housing  512 . A central aperture  520  can be formed in the center of the motor housing  512  and extending through the motor housing  512 . The motor housing  512  can operate as a rotating blade hub for mounting a set of blades  514 , shown as four blades, and can mount to the motor housing  512  via mount struts  516 . The blades  514  can be similar to the blades as described herein, such as the blades  20  described in  FIGS.  3 A- 3 C , for example. A set of hub sockets  518  can be formed in the motor housing  512  adapted to couple the mount struts  516  for mounting the blades  514  to the motor housing  512 . 
       FIG.  13    illustrates an enlarged view of the motor housing  512  of  FIG.  12   . The motor housing  512  can have an upper surface  530 . The hub sockets  518  can have a bottom wall  532  with tapered walls  534  extending between the upper surface  530  and the bottom wall  532 . The bottom wall  532  can be horizontal. The tapered walls  534  can have a variable cross-sectional area, defining an interior wall  536  extending as a neck  538  terminating at a throat  540 . A mouth  542  extends from the throat  540  to a terminal edge  544  of the motor housing  512 . Fasteners  546  can couple the mount struts  516  to the motor housing  512  and the blades  514  to the mount struts  516 . As shown, two fasteners  546  couple each mount strut  516  to the motor housing  512  and two fasteners  546  couple each blade  514  to each complementary mount strut  516 . While two fasteners  546  are shown at each position, any number of fasteners is contemplated. The fasteners  546  can be any suitable fastener, such as a screw or bolt in non-limiting examples. 
     The ceiling fan  510  further includes a motor shaft  550  disposed within and partially extending from the motor housing  512  for coupling to a motor interior of the motor housing  512 . A nut  598  redundantly fastens the motor housing  512  to the motor shaft  550 . A shaft coupler  552  couples to the motor shaft  550  for suspending the ceiling fan  510 . Additionally, a secondary suspension system  554  is visible for redundantly suspending the ceiling fan  510  from a structure via the motor shaft  550 . 
     Referring now to  FIG.  14   , a cross-section of the ceiling fan  510  taken along section XIV-XIV of  FIG.  13   . Fasteners  560  couple an upper motor housing portion  562  and a lower motor housing portion  564  to form the motor housing  512 . The upper and lower motor housing portions  562 ,  564  encase a motor assembly  566  including a fixed stator  568  and a rotor  570  rotatable about the stator  568 . The stator is non-rotating and slidably couples to the motor shaft  550 . The fasteners  560  couple the rotor  570  to the motor housing  512  such that the motor housing  512  rotates with the rotor  570 . The stator  568  fixes to the motor shaft  550  such that the motor shaft  550  is non-rotating. The rotor  570 , the motor housing  512 , and any other rotating portions of the ceiling fan encased within the motor housing  512  can define a rotor assembly, which rotates about the motor shaft  550 . 
     The motor shaft  550  can include an upper shoulder  556  and a lower shoulder  558 . Two bearings  572  slidably mount to the motor shaft  550  to permit rotation of the motor housing  512  about the motor shaft  550 . The bearings  572  abut the rotor assembly at the motor housing  516 . The upper bearing  572  can position at the upper shoulder  556  and the lower bearing  572  can position at the lower shoulder  558 . Each bearing  572  includes an inner housing  574  and an outer housing  576  encasing a set of bearing balls  578 . As such, the outer housing  576  can rotate with the motor housing  512  via the bearing balls  578  while the inner housing  574  can remain stationary at the motor shaft  550 . 
     The bearings  572 , which rest on the shoulders  556 ,  558 , can support the motor assembly  566 . As such, the motor coupler  552  can suspend the motor shaft  550  from a building and the motor shaft  550  can support the remaining portions of the ceiling fan  510 , including the motor assembly  566 , or any blades attached thereto. 
     A set of spacers  580  slidably mount to the motor shaft  550 . The spacers  580  can space the bearings  572  from the stator  568 . The spacers  580  can position against the inner housing  574  of the bearing and the stator  568  as non-rotating elements. The upper spacer  380  can circumscribed the upper shoulder  556 . The spacers  580  fix the sliding location of the first and second bearings  572  relative to the stator along the motor shaft  550 . As such, the stator  568  is compressively retained between the first and second spacers  580  and the bearings  572  compressively retain the spacers  580 , and thus the stator  568 . The spacers  580  maintain the bearings  572  positioned against the motor housing  512  to minimize wobble or vibration of the motor assembly  566 . On the opposite side of the lower bearing  572 , a spring member  582  is provided to load the bearings  572  against the motor housing  512 . The spring member  582  can position against the outer housing  576  of the bearing  572  between the housing  512 , between two rotating parts. As such, the spring member  582  can be a rotating member as well. The spring member  582  also minimizes wobble or vibration emanating from the motor assembly  566 . At the bottom of the lower motor housing  564 , a plate  583  can fasten to the motor housing  512  to encase the motor assembly  566  at the bottom. 
     An electrical aperture  584  is provided in the motor shaft  550  with an electrical conduit  586  extending through the electrical aperture  584 . The electrical conduit  586  can provide electrical power to the stator  568  for powering the motor assembly  566  to drive the rotor  570 . 
     The shaft coupler  552  couples to the motor shaft  550  for suspending the ceiling fan  510  from a structure. A pin aperture  588  is formed in the motor shaft  550  with a seat  590  provided in the interior of the motor shaft  550  opposite of the pin aperture  588 . Alternatively, the seat  590  can be an additional pin aperture  588  extending through the motor shaft  550 . A retainer pin  592  inserts through the pin aperture  588  and secures in the seat  590 . A retainer rod  594  can attach to the pin  592  and includes a retainer aperture  596 . The retainer aperture  596  can secure to a redundancy system, such as a wire cord extending through a connected downrod, for example. As such, the retainer rod  594  can couple to the motor shaft  550  via the retainer pin  592  in the pin aperture  588  and the seat  590 . 
     A nut  598  with a lock washer  600  can be provided around the top of the motor shaft  550  within the shaft coupler  552 . The nut  598  can redundantly secure the shaft coupler  552  to the motor shaft  550 . Additionally,  598 , the nut  598  can secure the pin  592  within the pin aperture  588 . 
     The combination of the pin  592 , the retainer aperture  596 , and the nut  598  can define the secondary suspension system  554 . The secondary suspension system  554  provides a redundant mount for the ceiling fan  510 . As the secondary suspension system  554  mounts to non-rotation portions of the ceiling fan  510 , such as the motor shaft  550 , redundant operation of the secondary suspension system  554  permits continued rotation of the ceiling fan  510  during use, minimizing potential damage to the ceiling fan  510  during operation of the secondary suspension system  554 . 
       FIG.  15    is an exploded view of the components shown in  FIG.  14   , including exploded mount struts  516 . In assembly, the motor assembly  566  can couple to the motor shaft  550 . The electrical conduit  586  of  FIG.  14    can be installed within the motor shaft  550  to the motor assembly  566 . Spacers  580  can be installed along the motor shaft  550  on either side of the motor assembly  566 . Bearings  572  can be installed on either side of the spacers  580 . At the bottom, the spring member  582  can be positioned against the bearing  572 . At the top, the shaft coupler  552  and the secondary suspension system  554  can be mounted above the motor shaft  550 . The mount struts  516  can mount to the motor housing  512  for mounting blades. 
     Turning now to  FIG.  16   , an exemplary mount strut  516  is shown. The mount strut  516  can be hollow, and made of steel, for example, reducing weight while maintaining structural integrity. The mount strut  516  includes a first portion as a hub portion  610  and a second portion as a blade portion  612 . The hub portion  610  and the blade portion  612  can have a cross-sectional area that is non-constant along the length of the strut  516 , while it is contemplated that the cross-sectional area can be constant. The hub portion  610  can mount to the motor housing  512  of  FIG.  15    and the blade portion  612  can mount to the blades  514  of  FIG.  12   . A set of mount aperture  616  can be formed in the mount strut  516 , shown as two aperture  616  in each portion  610 ,  612 . A twist  614  is formed in the mount strut  516 . The twist  614  orients the mount strut  516  such that the hub portion  610  and the blade portion  612  are rotationally offset from one another by an offset angle  616 . The offset can be between 1-degree and 45-degrees, for example. The offset angle  616  can be used to orient a blade attached to the mount strut  516  at a pitch angle or angle of attach relative to a chord of the blade. The twist  614  enables flat, flush mounting of the hub and blade portions  610 ,  612  against the horizontal bottom wall  532  ( FIG.  13   ) and the blade  514 , respectively. The particular offset angle  616  can be tailored based upon particular ceiling fan  510  to maximize efficiency. For example, the offset angle  616  can be increased or decreased based upon the length of the blades, or the rotational speed of the ceiling fan  510 , for example. 
     It should be appreciated that the ceiling fan  510  and related components described in  FIGS.  12 - 16    provide for a ceiling fan having improved efficiency. The ceiling fan  510  provides for maximizing air movement while minimizing energy costs. Additionally, the secondary suspension system  554  provides for a redundant mounting system for the fan. The components are optimized to reduce weight to further improve efficiency and minimize the weight tax on a suspending structure. 
       FIG.  17    illustrates a blade holder, which can be the blade holder  18  as described herein, with an alternative push-lock assembly  650  for mounting the blade holder  18  to a ceiling fan motor housing, such as the motor hub, such as the motor housing  198  of  FIG.  2   . The push-lock assembly  650  includes an end cap  652  including a pin aperture  654 . A pin  656  is provided in the pin aperture  654 . The blade holder  18  includes a spring pin aperture  658 . A spring pin  660  is provided in the spring pin aperture  658 . The spring pin  660  couples the push-lock assembly  650  to the blade holder  18 . At assembly, the push-lock assembly  650  can insert into the blade holder  18  and the spring pin  660  can insert into the spring pin aperture  658  to secure the push-lock assembly  650  to the blade holder  18 . 
     Referring now to  FIG.  18   , the end cap  652  is shown in dashed-line to provide a view of the interior assembly of the push-lock assembly  650 . The end cap  652  further includes a lock end  670  and a mount end  672 . The mount end  672  includes smaller diameter than the lock end  670  permitting insertion into the blade iron  18  ( FIG.  17   ). The mount end  672  also has a pair of opposing apertures  674  for receiving the spring pin  660 . 
     Within the lock end  670  is a pin assembly  676 . The pin assembly  676  includes the pin  656 , a spring  680  and a washer  682 . A seat  684  is formed in the interior of the lock end  670  as part of the end cap  652 . The washer  682  can seat at the seat  684  to secure the spring  680  at the seat  684 . The spring  680  abuts the pin  656  opposite of the seat  684  and the washer  682 . The pin  656  further includes a pin end  686  and an actuation end  688 . The actuation end  688  includes a widened diameter and abuts the spring  680 . As such, the pin  656  can actuate via the spring  680  to move the pin end  686  in and out of the pin aperture  654 . 
     In operation, the pin  656  can actuate via the spring  680  to retract during insertion of the push-lock assembly  650  for coupling the blade holder  18  ( FIG.  17   ) to a ceiling fan or motor housing. At insertion, the pin  656  retracts into the end cap  652 . At full insertion, the pin  652  will extend into a receiving aperture, such as that of the pin lock  218  of  FIG.  5 A . In such a receiving aperture, the push-lock assembly  650  attaches to the ceiling fan to mount the blade holder  18 . A blade, such as that described herein, can mount to the opposing end of the blade holder  18  to mount the blade to the ceiling fan. 
     The push-lock assembly  650  as described provides for a strengthened assembly for coupling a blade holder to a ceiling fan or motor housing. The push-lock assembly  650  also provides for a simple assembly, which facilitates slidable insertion of the blade holder  18  to mount to the motor housing. Removal of such a blade holder  18  is also simplified by depression of the pin  656  and slidable removal of the blade holder  18 . Thus, it should be appreciated that the push-lock assembly provides for a simplified assembly for mounting a blade and blade iron to a ceiling fan, reducing cost and providing for ease of use by a user or installer. 
     In addition to the concepts covered by the claims, the following concepts can also provide for the basis for claims in any possible combination: 
     A ceiling fan comprising: a motor assembly having a non-rotating motor shaft and a rotating blade hub rotating about the non-rotating shaft; multiple blades mounted to the rotating blade hub; and a downrod having an upper end configured to mount to a structure to a lower end mounted to the non-rotating motor shaft. 
     A ceiling fan assembly further comprises a shaft coupler coupled to the non-rotating motor shaft and a downrod plate coupled to the lower end of the downrod, wherein the shaft coupler and downrod plate are secured to each other. 
     A ceiling fan assembly wherein the shaft coupler located above the rotating blade hub. 
     A ceiling fan assembly wherein the shaft coupler located on an upper end of the non-rotating motor shaft. 
     A ceiling fan assembly wherein the shaft coupler comprises a collar having a central opening that receives the non-rotating motor shaft. 
     A ceiling fan assembly wherein the collar slides over the non-rotating motor shaft. 
     A ceiling fan assembly wherein the collar slides over the non-rotating motor shaft. 
     A ceiling fan assembly wherein the collar is indexed relative to the non-rotating motor shaft. 
     A ceiling fan assembly wherein the index comprises one of the collar and the non-rotating motor shaft comprises a key and the other comprises a keyway that receives the key. 
     A ceiling fan assembly further comprising a retaining nut threaded onto a portion of the non-rotating motor shaft. 
     A ceiling fan assembly wherein at least one of the shaft coupler and the downrod plate has tapped studs and the other of the at least one shaft coupler and downrod plate has openings for receiving the tapped studs. 
     A ceiling fan assembly further comprising nuts threaded onto the tapped studs to secure together the shaft coupler and the downrod plate. 
     A ceiling fan assembly further comprising a guy wire fitting mounted to the downrod. 
     A ceiling fan assembly wherein the guy wire fitting is located above the lower end of the downrod. 
     A ceiling fan assembly wherein the guy wire fitting comprises a disk having multiple openings. 
     A ceiling fan assembly wherein the disk has an inner ring and an outer ring, with the openings lying between the inner and outer rings. 
     A ceiling fan assembly further comprising at least one turnbuckle having a hook extending through one of the openings and hooked to the outer ring. 
     A ceiling fan assembly wherein the disk is welded to the downrod. 
     A ceiling fan comprising: a motor assembly having a rotating blade hub; multiple blades mounted to the rotating blade hub; a downrod having an upper end configured to mount to a structure and a lower end mounted to the motor assembly; and a guy wire fitting mounted to the downrod. 
     A ceiling fan assembly wherein the guy wire fitting is located above the lower end of the downrod. 
     A ceiling fan assembly wherein the guy wire fitting comprises a disk having multiple openings. 
     A ceiling fan assembly wherein the disk has an inner ring and an outer ring with the openings lying between the inner and outer rings. 
     A ceiling fan assembly further comprising at least one turnbuckle having a hook extending through one of the openings and hooked to the outer ring. 
     A ceiling fan assembly wherein the disk is welded to the downrod. 
     A ceiling fan comprising: a motor assembly having a rotating blade hub and a downrod mount; multiple blades mounted to the rotating blade hub; a downrod having an upper end configured to mount to a structure and a lower end having a mount motor; and multiple studs provided in one of the downrod mount or the motor mount and corresponding openings provided in the other of the downrod mount or the motor mount, with the studs being received within the openings to aid in securing the downrod to the motor assembly. 
     A ceiling fan further comprising a motor assembly plate coupled to the motor assembly and a downrod plate coupled to the lower end of the downrod, wherein the studs are provided on one of the motor assembly plate or the downrod plate and the openings are provided in the other of the motor assembly plate and the downrod plate. 
     A ceiling fan wherein the motor assembly comprises a non-rotating shaft about which the rotating blade hub rotates and which has a shaft coupler forming the motor assembly plate. 
     A ceiling fan wherein the shaft coupler is located above the rotating blade hub. 
     A ceiling fan wherein the shaft coupler is located on an upper end of the non-rotating motor shaft. 
     A ceiling fan wherein the shaft coupler comprises a collar having a central opening that receives the non-rotating motor shaft. 
     A ceiling fan wherein the collar slides over the non-rotating shaft. 
     A ceiling fan wherein the collar is indexed relative to the non-rotating shaft. 
     A ceiling fan wherein the index comprises one of the collar and non-rotating shaft comprises a key and the other comprises a keyway that receives the key. 
     A ceiling fan further comprising a retaining nut threaded onto a tapped portion of the non-rotating motor shaft. 
     A ceiling fan wherein the studs are tapped studs. 
     A ceiling fan further comprising nuts threaded onto the tapped studs to secure together the shaft coupler and the downrod plate. 
     A ceiling fan comprising: a motor assembly having a rotating blade hub with a first receiver; at least one fan blade having a second receiver; and a blade holder having a first end with a first cross-section and a second end with a second cross-section different from the first cross-section, with the first end received within the first receiver and the second end receiving within the second receiver to couple the blade to the blade hub. 
     A ceiling fan assembly wherein the first and second cross-sections have a height and a width and the height of the second cross-section is less than the height of the first cross-section. 
     A ceiling fan assembly wherein the first and second cross-sections have the same area. 
     A ceiling fan assembly wherein the first and second cross-sections are not the same. 
     A ceiling fan assembly of claim  39  wherein the area of the second cross-section is greater than the area of the first cross-section. 
     A ceiling fan assembly wherein the first cross-section is a circle and the second cross-section is an ellipse. 
     A ceiling fan assembly wherein the blade holder comprises a circular section defining the circle, an elliptical section defining the ellipse, and a transition section connecting the circular and elliptical sections, with the transition section transition from a circular to an elliptical shape. 
     A ceiling fan assembly wherein the blade holder is a single piece. 
     A ceiling fan assembly wherein the blade holder is formed by stamping. 
     A ceiling fan assembly wherein the elliptical section has multiple mounting openings. 
     A ceiling fan assembly wherein the second receiver is located within an interior of the blade and the elliptical section is received within the second receiver. 
     A ceiling fan assembly wherein fasteners extend through the multiple openings and the blade. 
     A ceiling fan assembly wherein the first receiver comprises at least one sleeve and the circular section is received within the sleeve. 
     A ceiling fan assembly further comprising an index fixing the rotational position of the circular section relative to the sleeve. 
     A ceiling fan assembly wherein the index comprises a biased detent. 
     A ceiling fan assembly wherein the biased detent comprises a biased pin on one of the circular section and the sleeve and a recess receiving the pin on the other of the one of the circular section and the sleeve. 
     A ceiling fan assembly wherein the blade comprises a hollow interior and an open end, which form at least a portion of the second receiver. 
     A ceiling fan assembly wherein the first receiver comprises at least one split sleeve and the first end is received within the compressively retained by the at least one split sleeve. 
     A ceiling fan assembly further comprising an index fixing the rotational position of the blade relative to the blade hub. 
     A ceiling fan assembly further comprising mechanical fasteners passing through the blade and the second end to secure the blade to the blade holder. 
     A aspects of the disclosure described herein relate to a ceiling fan comprising: a motor assembly having a rotating blade hub; and at least one blade mount provided on the blade hub and having a split sleeve and a compression fitting closing the split sleeve. 
     A ceiling fan wherein the motor assembly comprises a rotatable housing portion and the blade hub is provided on the rotatable housing portion. 
     A ceiling fan wherein the motor assembly comprises a non-rotating motor shaft about which the rotatable housing portion rotates. 
     A ceiling fan wherein the blade hub is integrally formed with the rotatable housing portion. 
     A ceiling fan wherein the split sleeve and compression fittings are integrally formed with the rotatable housing portion. 
     A ceiling fan wherein the motor assembly comprises upper and lower motor housings and one of the upper and lower motor housings forms the rotatable housing portion. 
     A ceiling fan further comprising a pair of axially-spaced compression fittings closing the split sleeve. 
     A ceiling fan wherein the compression fitting is integrally formed with the split sleeve. 
     A ceiling fan wherein the compression fitting comprises a split ring. 
     A ceiling fan further comprising a rotation index. 
     A ceiling fan of wherein the rotation index comprises a detent in the sleeve. 
     A ceiling fan wherein the detent is aligned with the split in the split sleeve. 
     A ceiling fan wherein the detent is inboard of the compression fitting. 
     A ceiling fan wherein the at least one blade mount comprises multiple blade mounts radially spaced about the blade hub. 
     A ceiling fan wherein the motor assembly comprises a rotating housing portion having a central hub and the blade mounts extend radially form the hub. 
     A ceiling fan wherein the motor assembly comprises a non-rotating shaft and the hub circumscribes and rotates about the non-rotating shaft. 
     A ceiling fan wherein the motor assembly comprises upper and lower motor housings, one of which forms the rotating housing portion. 
     A ceiling fan wherein the blade mounts are integrally formed with the one of the upper and lower motor housings. 
     A ceiling fan comprising: an upper motor housing; a lower motor housings; and a magnet seat formed in a portion of the upper and lower housing configured to seat a rotor and mount the rotor to the upper and lower motor housings. 
     A ceiling fan wherein the magnets comprise a permanent magnet. 
     A ceiling fan wherein the magnet comprises an electromagnet. 
     A ceiling fan wherein the electromagnet comprises a motor winding. 
     A ceiling fan wherein the magnet seat comprises confronting channels formed in each of the upper and lower housings, which collectively form the magnet seat when the upper and lower housings are secured together. 
     A ceiling fan wherein the upper and lower housings are secured together by mechanical fasteners. 
     A ceiling fan wherein at least one of the upper or lower housings rotates to define a rotating housing. 
     A ceiling fan further comprising a blade assembly coupled to the blade mount. 
     A ceiling fan wherein the blade assembly comprises a blade and a blade holder coupling the blade to the blade holder. 
     A ceiling fan further comprising a non-rotating motor shaft about which the rotating housing rotates. 
     A ceiling fan wherein the rotating housing is rotatably mounted to the non-rotating motor shaft. 
     A ceiling fan further comprising a stator winding mounted to the non-rotating shaft and located within an interior defined by the upper and lower housings. 
     A ceiling fan wherein the magnets form a portion of a rotor for the motor. 
     A ceiling fan wherein the upper and lower housings rotate about non-rotating shaft. 
     A ceiling fan further comprising upper and lower bearings wherein the non-rotating shaft has upper and lower bearing stops for supporting the bearings against which the upper and lower housings correspondingly abut. 
     A ceiling fan wherein the upper and lower housings are biased against their corresponding housing seats. 
     A ceiling fan wherein the stator winding is fixed relative to the non-rotating shaft and with respect to the housing seats. 
     A ceiling fan assembly comprising: a non-rotating motor shaft with an upper and lower bearing stop; a stator mounted to the non-rotating motor shaft; a rotor surrounding the stator; a motor housing having an upper bearing seat spaced above the upper bearing stop and a lower bearing seat spaced below the lower bearing stop; an upper bearing seated within the upper bearing seat; a lower bearing seated within the lower bearing seat; and a downrod coupling provided on the non-rotating shaft; wherein when the ceiling fan assembly is suspended from a structure with the downrod coupling, the weight of the rotor presses the upper bearing against the upper bearing stop such that the weight of the rotor is transferred through the upper bearing to the non-rotating shaft. 
     A ceiling fan assembly further comprising a spring located within the lower bearing seat and biasing the lower bearing against the lower bearing stop. 
     A ceiling fan assembly wherein the non-rotating motor shaft is hollow and further comprising a retaining rod passing through the hollow motor shaft. 
     A ceiling fan assembly wherein a lower end of the retaining rod has a cap that abuts a retention plate adjacent to a lower portion of the non-rotating shaft. 
     A ceiling fan assembly wherein an upper end of the retaining rod is located above an upper end of the non-rotating shaft. 
     A ceiling fan assembly wherein the upper end of the retaining rod terminates in a clevis. 
     A ceiling fan assembly wherein the rotor comprises upper and lower housings, which are secured together, with the upper housing having the upper bearing seat and the lower housing having the lower bearing seat. 
     A ceiling fan assembly wherein the upper and lower housings define a magnet seat in which magnets for the rotor are located. 
     A ceiling fan assembly wherein magnet seat comprises confronting channels formed in each of the upper and lower housings. 
     A ceiling fan assembly wherein the upper and lower housings are secured together by mechanical fasteners. 
     A ceiling fan assembly further comprising multiple blade mounts provided on one of the upper and lower housing. 
     A ceiling fan assembly wherein the blade mounts comprise at least one split sleeve. 
     A ceiling fan assembly wherein the blade mounts comprise at least two axially aligned split sleeves. 
     A ceiling fan assembly wherein the blade mounts further comprise a blade rotation stop. 
     A ceiling fan assembly wherein the non-rotating shaft has a stator stop located between the upper and lower bearing seats. 
     A ceiling fan assembly wherein the stator stop and the lower bearing seat are formed by one or more collars on the non-rotating shaft. 
     A ceiling fan assembly wherein the non-rotating motor shaft includes a weep hole. 
     A ceiling fan comprising: a motor assembly having a hollow, non-rotating motor shaft; and a retaining rod passing through the motor shaft; wherein the retaining rod provides a redundant mount system for the ceiling fan. 
     A ceiling fan further comprising a retention plate wherein the retaining rod secures retention plate and the retention plate is secured to the non-rotating motor shaft. 
     A ceiling fan wherein the non-rotating motor shaft is hollow and the retaining rod extends at least into the hollow of the non-rotating motor shaft. 
     A ceiling fan wherein a lower end of the retaining rod has a cap that abuts a lower portion of the non-rotating shaft. 
     A ceiling fan wherein an upper end of the retaining rod is located above an upper end of the non-rotating shaft. 
     A ceiling fan wherein the upper end of the retaining rod terminates in a clevis. 
     A ceiling fan further comprising a shaft coupler coupled to the non-rotating shaft and a downrod plate coupled to the lower end of the downrod, wherein the shaft coupler and downrod plate are secured to each other. 
     A ceiling fan wherein the shaft coupler is located on an upper end of the non-rotating motor shaft. 
     A ceiling fan wherein the shaft coupler comprises a collar having a central opening that receives the non-rotating motor shaft. 
     A ceiling fan wherein the collar slides over the non-rotating motor shaft. 
     A ceiling fan wherein the collar is indexed relative to the non-rotating motor shaft. 
     A ceiling fan wherein index comprises one of the collar and non-rotating motor shaft comprises a key and the other comprises a keyway that receives the key. 
     A ceiling fan further comprise a retaining nut threaded onto a tapped portion of the non-rotating motor shaft. 
     A ceiling fan wherein at least one of the shaft coupler and the downrod plate has tapped studs and the other of the at least one shaft coupler and downrod plate has openings for receiving the tapped studs. 
     A ceiling fan further comprising nuts threaded onto the tapped studs to secure together the shaft coupler and the downrod plate. 
     A ceiling fan comprising: a motor assembly having a non-rotating, hollow, motor shaft; a stator winding carried by the motor shaft; and a wiring harness passing through the hollow of the motor shaft and electrically coupled to the stator winding. 
     A ceiling fan further comprising a hollow down rod mounted to the motor shaft and the wiring harness passes through the hollow of the down rod and the non-rotating shaft. 
     A ceiling fan further comprising a retaining rod passing through the hollow downrod and secured to at least one of the non-rotating motor shaft and the motor assembly. 
     A ceiling fan further comprising a shaft coupler coupled to the non-rotating shaft and a downrod plate coupled to the lower end of the downrod, wherein the shaft coupler and downrod plate are secured to each other. 
     A ceiling fan wherein the shaft coupler is located on an upper end of the non-rotating motor shaft. 
     A ceiling fan further comprise a retaining nut threaded onto a tapped portion of the non-rotating motor shaft. 
     A ceiling fan wherein a lower end of the retaining rod has a cap that abuts a lower portion of the non-rotating shaft. 
     A ceiling fan wherein an upper end of the retaining rod is located above an upper end of the non-rotating shaft. 
     A ceiling fan wherein the upper end of the retaining rod terminates in a clevis. 
     A ceiling fan further comprising an exit passage extending from the hollow through an exterior of the motor shaft and the wiring harness passes through the exit passage. 
     A ceiling fan wherein the non-rotating shaft comprises a stator stop against which the stator winding rests. 
     A ceiling fan wherein the stator stop comprises a collar about the non-rotating shaft. 
     A ceiling fan comprising: a motor assembly having a rotating blade hub; a plurality of blades; at least one blade holder for mounting the plurality of blades to the blade hub; at least one blade mount provided on the blade hub for receiving the blade holder and having at least one fastener aperture and at least one pin aperture; at least one saddle disposed in the fastener aperture; and at least one fastener for selectively tightening or loosening the saddle. 
     A ceiling fan wherein the motor assembly comprises a rotatable housing portion and the blade hub is provided on the rotatable housing portion. 
     A ceiling fan wherein the motor assembly comprises a non-rotating motor shaft about which the rotatable housing portion rotates. 
     A ceiling fan wherein the blade hub is integrally formed with the rotatable housing portion. 
     A ceiling fan wherein the motor assembly comprises upper and lower motor housings and one of the upper and lower motor housings forms the rotatable housing portion. 
     A ceiling fan wherein the at least one blade mount comprises multiple blade mounts radially spaced about the blade hub. 
     A ceiling fan wherein the motor assembly comprises a rotating housing portion having a central hub and the blade mounts extend radially from the hub. 
     A ceiling fan wherein the motor assembly comprises a non-rotating shaft and the hub circumscribes and rotates about the non-rotating shaft. 
     A ceiling fan wherein the blade mounts extend radially from the motor shaft to collectively define a horizontal plane. 
     A ceiling fan wherein the fastener aperture is oriented at an angle relative to the horizontal plane. 
     A ceiling fan wherein the angle is 20 degrees. 
     A ceiling fan wherein the blade mount defines a cylindrical cavity and the fastener aperture extends radially from the cylindrical cavity. 
     A ceiling fan wherein the saddle is adapted to anchor the blade holder along the radial extension of the fastener aperture. 
     A ceiling fan wherein the motor assembly comprises upper and lower motor housings, one of which forms the rotating housing portion. 
     A ceiling fan wherein the blade mounts are integrally formed with the one of the upper and lower motor housings. 
     A ceiling fan wherein the at least one fastener is a set screw. 
     A ceiling fan wherein the blade mount further comprises an inlet, with a channel extending from the inlet to the pin aperture. 
     A ceiling fan wherein the saddles are aligned along the channel. 
     A ceiling fan wherein the at least one saddle includes two saddles. 
     A ceiling fan assembly comprising: a stator assembly having a non-rotating motor shaft and stator slidably and non-rotationally coupled to the non-rotating motor shaft; a rotor assembly; a first bearing slidably mounted to the non-rotating motor shaft and rotatably coupling the rotor assembly to the stator assembly; and a first spacer located between the first bearing and the stator assembly to fix the sliding location of the first bearing relative to the stator along the non-rotating motor shaft. 
     A ceiling fan assembly further comprising a second bearing and second spacer located on an opposite side of the stator than the first bearing and first spacer, with the second bearing slidably mounted to the non-rotating motor shaft, the second spacer located between the second bearing and the stator. 
     A ceiling fan assembly wherein the second bearing rotatably couples the rotor assembly to the stator assembly. 
     A ceiling fan assembly wherein the stator is compressively retained between the first and second spacers. 
     A ceiling fan assembly wherein the first and second spacers are compressively retained between the first and second bearings. 
     A ceiling fan assembly wherein the rotor assembly abuts at least one of the first and second bearings. 
     A ceiling fan assembly wherein the rotor assembly abuts both the first and second bearings. 
     A ceiling fan assembly wherein the rotor assembly comprises a housing abutting both the first and second bearings. 
     A ceiling fan assembly wherein the stator assembly is compressively retained by at least one of the first spacer and first bearing. 
     A ceiling fan assembly wherein the first spacer is compressively retained between the first bearing and the stator assembly. 
     A ceiling fan assembly wherein the rotor assembly abuts the first bearing. 
     A ceiling fan assembly wherein the first bearing is compressively retained between the rotor assembly and the first bearing. 
     A ceiling fan assembly wherein the rotor assembly comprises a housing that compressively retains the first bearing. 
     A ceiling fan assembly wherein the non-rotating motor shaft has a shoulder and at least one of the first bearing and first spacer abuts the shoulder. 
     A ceiling fan assembly wherein the first bearing abuts the shoulder. 
     A ceiling fan assembly wherein the spacer circumscribes the shoulder. 
     A ceiling fan assembly wherein the spacer is compressively retained between the bearing and the stator. 
     A ceiling fan comprising: a motor assembly having a rotating blade hub; at least one hub socket formed in the blade hub; a blade having a body with a blade socket and the body extending from a root to a tip to define a body span-wise axis and an airfoil cross-section defining a chord-wise axis; and a strut having a hub portion received within the hub socket and a blade portion received within the blade socket to couple the blade to the hub; wherein at least one of the blade portion is rotationally offset from the hub portion or the blade socket is rotationally offset from the blade such that the blade is provided with an angle of attack relative to the chord-wise axis when the blade portion is received within the blade socket. 
     A ceiling fan wherein the hub socket has a horizontally-oriented bottom wall. 
     A ceiling fan wherein the blade portion is rotationally offset from the hub portion. 
     A ceiling fan wherein the cross-sectional area of the strut is non-constant along the length of the strut. 
     A ceiling fan wherein the hub socket includes a bottom wall and the at least one fastener aperture is formed in the bottom wall. 
     A ceiling fan wherein the hub socket further comprises tapered walls between the bottom wall and the remainder of the blade hub. 
     A ceiling fan wherein the hub socket further includes a mouth at a terminal edge of the rotating blade hub. 
     A ceiling fan wherein the hub socket further includes a neck and the throat defined at an intersection of the mouth and the neck. 
     This written description uses examples to disclose the invention, including the best mode, and to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and can include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.