Patent Abstract:
Efficient traditionally appearing ceiling fan blades with aerodynamical upper surfaces and wide tip ends for ceiling fans with blades formed from plastic and/or wood and/or separately attached surfaces that run at reduced energy consumption that move larger air volumes than traditional flat shaped ceiling fan blades. And methods of operating the novel ceiling fans blades for different speeds of up to and less than approximately 250 rpm. The novel blades twisted blades can be configured for ceiling fans having any diameters from less than approximately 32 inches to greater than approximately 64 inch fans, and can be used in two, three, four, five and more blade configurations. The novel fans can be run at reduced speeds, drawing less Watts than conventional fans and still perform better with more air flow and less problems than conventional flat type conventional flat and planar upper and lower surface blades.

Full Description:
[0001]    This invention is a Continuation-In-Part of Design application Ser. No. 29/252,288 filed Jan. 20, 2006. 
     
    
     FIELD OF INVENTION 
       [0002]    This invention relates to ceiling fans, and in particular to efficient traditionally appearing ceiling fan blades with aerodynamical upper surfaces and wide tip ends for ceiling fans with blades formed from plastic and/or wood and/or be separately attached as an upper surface, that run at reduced energy consumption that move larger air volumes than traditional flat shaped ceiling fan blades, and to methods of operating the novel ceiling fans. 
       BACKGROUND AND PRIOR ART 
       [0003]    Existing flat planar appearing ceiling fans are the most popular type of ceiling fans sold in the United States, and are known to have relatively poor air moving performance at different operating speeds. See for example U.S. Pat. Des. 355,027 to Young and Des. 382,636 to Yang. These patents while moving air are not concerned with maximizing optimum downward airflow. 
         [0004]    Additionally, many of the flat ceiling fan blades have problems such as wobbling, and excessive noise that is noticeable to persons in the vicinity of the fan blades. The flat planar rectangular blade can have a slight tilt to increase air flow but are still poor in air moving performance, and continue to have the other problems mentioned above. 
         [0005]    Aircraft, marine and automobile engine propeller type blades have been altered over the years to shapes other than flat rectangular. See for example, U.S. Pat. Nos. 1,903,823 to Lougheed; 1,942,688 to Davis; 2,283,956 to Smith; 2,345,047 to Houghton; 2,450,440 to Mills; 4,197,057 to Hayashi; 4,325,675 to Gallot et al.; 4,411,598 to Okada; 4,416,434 to Thibert; 4,730,985 to Rothman et al. 4,794,633 to Hickey; 4,844,698 to Gomstein; 5,114,313 to Vorus; and 5,253,979 to Fradenburgh et al.; Australian Patent 19,987 to Eather. 
         [0006]    However, these patents are generally used for high speed water, aircraft, and automobile applications where the propellers are run at high revolutions per minute (rpm) generally in excess of 500 rpm. None of these propellers are designed for optimum airflow at low speeds of less than approximately 200 rpm which is the desired speeds used in overhead ceiling fan systems. 
         [0007]    Some alternative blade shapes have been proposed for other types of fans. See for example, U.S. Pat. Nos. 1,506,937 to Miller; 2,682,925 to Wosik; 4,892,460 to Volk; 5,244,349 to Wang; Great Britain Patent 676,406 to Spencer; and PCT Application No. WO 92/07192. 
         [0008]    Miller &#39;937 requires that their blades have root “lips  26 ”  FIG. 1  that overlap one another, and would not be practical or useable for three or more fan blade operation for a ceiling fan. Wosik &#39;925 describes “fan blades . . . particularly adapted to fan blades on top of cooling towers such for example as are used in oil refineries and in other industries . . . ”, column 1, lines 1-5, and does not describe any use for ceiling fan applications. 
         [0009]    The Volk &#39;460 patent by claiming to be “aerodynamically designed” requires one curved piece to be attached at one end to a conventional planar rectangular blade. Using two pieces for each blade adds extreme costs in both the manufacturing and assembly of the ceiling itself. Furthermore, the grooved connection point in the Volk devices would appear to be susceptible to separating and causing a hazard to anyone or any property beneath the ceiling fan itself. Such an added device also has necessarily less than optimal aerodynamic properties. 
         [0010]    Tilted type design blades have also been proposed over the years. See for example, U.S. Pat. No. D451,997 to Schwartz. 
         [0011]    However, none of the prior art modifies design shaped blades to optimize twist angles to optimize energy consumption and airflow, and reduce wobble and noise problems. 
         [0012]    The inventors and assignee of the subject invention have been at the forefront of inventing high efficiency ceiling fans by using novel twisted blade configurations. See for example, U.S. Pat. Nos. 6,884,034 and 6,659,721 and 6,039,541 to Parker et al. 
         [0013]    However, these fans have unique and to some a futuristic appearance as compared to traditional flat planar fan blades. Although, highly efficient, some consumers may tend to prefer the traditional flat planar blades that have been widely used as compared to the high efficiency ceiling fans that use twisted blades. 
         [0014]    Thus, the need exists for better performing traditionally appearing ceiling fan blades over the prior art. 
       SUMMARY OF THE INVENTION 
       [0015]    The first objective of the subject invention is to provide efficient ceiling fan blades, devices, apparatus and methods of operating ceiling fans, that preserve the traditional appearance of conventional flat planar ceiling fan blades when viewed underneath the ceiling fans. 
         [0016]    The second objective of the subject invention is to provide efficient traditionally appearing ceiling fan blades, devices, apparatus and methods of operating ceiling fans, where the blades have aerodynamical upper surfaces. 
         [0017]    The third objective of the subject invention is to provide efficient traditionally appearing ceiling fan blades, devices, apparatus and methods of operating ceiling fans, which move up to approximately 20% and greater airflow over traditional planar blades. 
         [0018]    The fourth objective of the subject invention is to provide efficient traditionally appearing ceiling fan blades, devices, apparatus and methods of operating ceiling fans, that are less prone to wobble than traditional flat planar ceiling fan blades. 
         [0019]    The fifth objective of the subject invention is to provide efficient traditionally appearing ceiling fan blades, devices, apparatus and methods of operating ceiling fans, that reduce electrical power consumption and are more energy efficient over traditional flat planar ceiling fan blades. 
         [0020]    The sixth objective of the subject invention is to provide efficient traditionally appearing ceiling fan blades, devices, apparatus and methods of operating ceiling fans, designed for superior airflow at up to approximately 240 revolutions and more per minute (rpm). 
         [0021]    The seventh objective of the subject invention is to provide efficient traditionally appearing ceiling fan blades, devices, apparatus and methods of operating ceiling fans, that are at least as aesthetically appealing as traditional flat planar ceiling fan blades. 
         [0022]    The eighth objective of the subject invention is to provide efficient traditionally appearing ceiling fan blades, devices, apparatus and methods of operating ceiling fans, capable of reduced low operational speeds for reverse operation to less than approximately 40 revolutions per minute or less. 
         [0023]    The ninth objective of the subject invention is to provide efficient traditionally appearing ceiling fan blades, devices, apparatus and methods of operating ceiling fans, capable of reduced low operational forward speeds of less than approximately 75 revolutions per minute or less. 
         [0024]    The tenth objective of the subject invention is to provide efficient traditionally appearing ceiling fan blades, devices, apparatus and methods of operating ceiling fans, capable of reduced medium operational forward speeds of up to approximately 120 revolutions per minute, that can use less than approximately 9 Watts at low speeds. 
         [0025]    The eleventh objective of the subject invention is to provide efficient traditionally appearing ceiling fan blades, devices, apparatus and methods of operating ceiling fans, that can have up to approximately 64 (sixty four) inch diameter (tip-to-tip fan diameter) or greater for enhancing air moving efficiency at lower speeds than conventional fans. 
         [0026]    The twelfth objective of the subject invention is to provide efficient traditionally appearing ceiling fan blades, devices, apparatus and methods of operating ceiling fans, that can move air over large coverage areas compared to conventional flat appearing ceiling fan blades. 
         [0027]    A preferred embodiment can include a plurality of efficient traditionally appearing ceiling fan blades, attached a ceiling fan motor. Diameter sizes of the fans can include but not be limited to less than and up to approximately 32″, 48″, 52″, 54″, 56″, 60″, 64″, and greater. The blades can be made from wood, plastic, and the like, and can include separately attachable upper aerodynamic surfaces. 
         [0028]    A preferred embodiment of the high efficiency traditional appearing ceiling fan can include a hub with a motor, and a plurality of blades attached to the ceiling fan motor, each blade having a flat and planar lower surfaces that visually appear to be flat and planar when viewed underneath the fan, and aerodynamic upper surfaces, wherein the aerodynamic upper surfaces of the blades move greater amounts of air compared to blades having both upper and lower flat and planar surfaces. Each of the blades can have tip ends being wider than root ends that are adjacent to the motor. 
         [0029]    The tip ends of the blades can have a width of approximately 5 to approximately 6 inches wide, and the root ends of the blades have a width of approximately 4 to approximately 5 inches wide. More preferably, the tip ends of the blades can have a width of approximately 5&amp; ¾ inches wide, and the root ends of the blades have a width of approximately 4&amp; ¾ inches wide. Each of the blades can have a rounded leading edge, and a blunt tipped trailing edge. 
         [0030]    The upper surfaces of the blades can include a downwardly curving slope from the maximum thickness point to the blunt tipped trailing edge, and a mid-thickness along a longitudinal axis of the blade being thicker than both thicknesses along the leading edge and the trailing edge of the blades. The blades can be formed from molded plastic. 
         [0031]    The aerodynamic upper surfaces can be made as part of the blades. Alternatively, the aerodynamic upper surfaces can be preformed and separately attachable to a base ceiling fan blade, the base ceiling fan blade having both upper and lower flat and planar surfaces. 
         [0032]    A novel method of operating efficient traditionally appearing ceiling fan blades with aerodynamical upper surfaces ceiling fan, can include the steps of providing blades having a flat and planar lower surfaces that visually appear to be flat and planar when viewed underneath, and aerodynamic upper surfaces, the blades being attached to a ceiling fan motor, rotating the blades relative to the motor, and generating a CFM (cubic feet per minute) airflow of at least five (5) percent (%) greater than traditionally appearing ceiling fan blades that have both upper and lower flat and planar surfaces. 
         [0033]    The method can further include the step generating an airflow of at least approximately 5% or greater CFM at a low rotational speed of approximately 0.15 meters per second (m/s) to approximately 0.40 meters per second (m/s) that is greater than the traditionally appearing ceiling fan blades that have both upper and lower flat and planar surfaces. 
         [0034]    The method can include the step of generating an airflow of at least approximately 8% or greater CFM at a low rotational speed of approximately 0.15 meters per second (m/s) to approximately 0.40 meters per second (m/s) that is greater than the traditionally appearing ceiling fan blades that have both upper and lower flat and planar surfaces. 
         [0035]    The method can include the step of generating an airflow of at least approximately 10% or greater CFM at a high rotational speed of approximately 0.50 meters per second (m/s) to approximately 0.85 meters per second (m/s) that is greater than the traditionally appearing ceiling fan blades that have both upper and lower flat and planar surfaces. 
         [0036]    The method can include the step of generating an airflow of at least approximately 20% or greater CFM at a high rotational speed of approximately 0.50 meters per second (m/s) to approximately 0.85 meters per second (m/s) that is greater than the traditionally appearing ceiling fan blades that have both upper and lower flat and planar surfaces. 
         [0037]    The method can include the step of generating an airflow of at least approximately 25% or greater CFM at a high rotational speed of approximately 0.50 meters per second (m/s) to approximately 0.85 meters per second (m/s) that is greater than the traditionally appearing ceiling fan blades that have both upper and lower flat and planar surfaces. 
         [0038]    The method can include the step of generating an airflow of at least approximately 2,250 or greater total CFM (cubic feet per minute) below the rotating blades at a low rotational speed of approximately 0.15 meters per second (m/s) to approximately 0.40 meters per second (m/s). The method can further include the step of generating an airflow of at least approximately 2,500 or greater total CFM (cubic feet per minute) below the rotating blades at a low rotational speed of approximately 0.15 meters per second (m/s) to approximately 0.40 meters per second (m/s). 
         [0039]    The method can include the step of generating an airflow of at least approximately 2,700 or greater total CFM (cubic feet per minute) below the rotating blades at a low rotational speed of approximately 0.15 meters per second (m/s) to approximately 0.40 meters per second (m/s). 
         [0040]    The method can include the step of generating an airflow of at least approximately 5,900 or greater total CFM (cubic feet per minute) below the rotating blades at a high rotational speed of approximately 0.50 meters per second (m/s) to approximately 0.85 meters per second (m/s). 
         [0041]    The method can include the step of generating an airflow of at least approximately 6,000 or greater total CFM (cubic feet per minute) below the rotating blades at a high rotational speed of approximately 0.50 meters per second (m/s) to approximately 0.85 meters per second (m/s). 
         [0042]    The method can include the step of generating an airflow of at least approximately 6,300 or greater total CFM (cubic feet per minute) below the rotating blades at a high rotational speed of approximately 0.50 meters per second (m/s) to approximately 0.85 meters per second (m/s). 
         [0043]    The method can include the step of generating at least approximately 160 or greater total CFM (cubic feet per minute) per Watts below the rotating blades at a low rotational speed of approximately 0.15 meters per second (m/s) to approximately 0.40 meters per second (m/s). 
         [0044]    The method can include the step of generating at least approximately 175 or greater total CFM (cubic feet per minute) per Watts below the rotating blades at a low rotational speed of approximately 0.15 meters per second (m/s) to approximately 0.40 meters per second (m/s). 
         [0045]    The method can include the step of generating at least approximately 189 or greater total CFM (cubic feet per minute) per Watts below the rotating blades at a low rotational speed of approximately 0.15 meters per second (m/s) to approximately 0.40 meters per second (m/s). 
         [0046]    The method can include the step of generating at least approximately 100 or greater total CFM (cubic feet per minute) per Watts below the rotating blades at a high rotational speed of approximately 0.50 meters per second (m/s) to approximately 0.85 meters per second (m/s). 
         [0047]    Further objects and advantages of this invention will be apparent from the following detailed descriptions of the presently preferred embodiments which are illustrated schematically in the accompanying drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
       First Embodiment Small Diameter Blades 
         [0048]      FIG. 1A  is a top perspective view of a first embodiment efficient traditionally appearing ceiling fan blade with aerodynamical upper surfaces and wide tip end. 
           [0049]      FIG. 1B  is a bottom perspective view of the blade of  FIG. 1A . 
           [0050]      FIG. 1C  is a top planar view of the blade of  FIG. 1A . 
           [0051]      FIG. 1D  is a bottom planar view of the blade of  FIG. 1A . 
           [0052]      FIG. 1E  is a left side view of the blade of  FIG. 1A  along arrow  1 E. 
           [0053]      FIG. 1F  is a right side view of the blade of  FIG. 1A  along arrow  1 F. 
           [0054]      FIG. 1G  is a tip end view of the blade of  FIG. 1A  along arrow  1 G. 
           [0055]      FIG. 1H  is a root end view of the blade of  FIG. 1A  along arrow  1 H. 
           [0056]      FIG. 2  is another top perspective view of the efficient traditionally appearing ceiling fan blade with aerodynamical upper surfaces and wide tip end of  FIG. 1A  with labeled cross-sections A, B, C, D, E, F, G, H, I 
           [0057]      FIG. 3  is another top view of the efficient traditionally appearing ceiling fan blade with aerodynamical upper surfaces of  FIG. 1A  with labeled cross-sections A-I. 
           [0058]      FIG. 4A  shows the cross-section A of  FIGS. 2-3 . 
           [0059]      FIG. 4B  shows the cross-section B of  FIGS. 2-3 . 
           [0060]      FIG. 4C  shows the cross-section C of  FIGS. 2-3 . 
           [0061]      FIG. 4D  shows the cross-section D of  FIGS. 2-3 . 
           [0062]      FIG. 4E  shows the cross-section E of  FIGS. 2-3 . 
           [0063]      FIG. 4F  shows the cross-section F of  FIGS. 2-3 . 
           [0064]      FIG. 4G  shows the cross-section G of  FIGS. 2-3 . 
           [0065]      FIG. 4H  shows the cross-section H of  FIGS. 2-3 . 
           [0066]      FIG. 4I  shows the cross-section I of  FIGS. 2-3 . 
         Second Embodiment Large Diameter Blades 
         [0067]      FIG. 5  is a top perspective view of a second embodiment of a large efficient traditionally appearing ceiling fan blade with aerodynamical upper surfaces and wide tip end with labeled cross-sections A, B, C, D, E, F, G, H. 
           [0068]      FIG. 6  is a top view of the large efficient traditionally appearing ceiling fan blade with aerodynamical upper surfaces of  FIG. 5  with labeled cross-sections A-H. 
           [0069]      FIG. 7A  shows the cross-section A of  FIGS. 5-6 . 
           [0070]      FIG. 7B  shows the cross-section B of  FIGS. 5-6 . 
           [0071]      FIG. 7C  shows the cross-section C of  FIGS. 5-6 . 
           [0072]      FIG. 7D  shows the cross-section D of  FIGS. 5-6 . 
           [0073]      FIG. 7E  shows the cross-section E of  FIGS. 5-6 . 
           [0074]      FIG. 7F  shows the cross-section F of  FIGS. 5-6 . 
           [0075]      FIG. 7G  shows the cross-section G of  FIGS. 5-6 . 
           [0076]      FIG. 7H  shows the cross-section H of  FIGS. 5-6 . 
           [0077]      FIG. 8A  is a perspective bottom view of a ceiling fan and efficient blades of  FIGS. 1-7I   
           [0078]      FIG. 8B  is a perspective top view of the ceiling fan and efficient blades of  FIG. 8A . 
           [0079]      FIG. 8C  is a side perspective view of the ceiling fan and efficient blades of  FIG. 8A . 
           [0080]      FIG. 8D  is a bottom view of the ceiling fan and efficient blades of  FIG. 8A . 
           [0081]      FIG. 8E  is a top view of the ceiling fan and efficient blades of  FIG. 8A . 
         Third Embodiment Rounded Wide Tip End Blades 
         [0082]      FIG. 9A  is a top perspective view of a third embodiment efficient traditionally appearing ceiling fan blade with aerodynamical upper surfaces and rounded wide tip end. 
           [0083]      FIG. 9B  is a bottom perspective view of the blade of  FIG. 9A . 
           [0084]      FIG. 9C  is a top planar view of the blade of  FIG. 9A . 
           [0085]      FIG. 9D  is a bottom planar view of the blade of  FIG. 9A . 
           [0086]      FIG. 9E  is a left side view of the blade of  FIG. 9A  along arrow  9 E. 
           [0087]      FIG. 9F  is a right side view of the blade of  FIG. 9A  along arrow  9 F. 
           [0088]      FIG. 9G  is a tip end view of the blade of  FIG. 9A  along arrow  9 G. 
           [0089]      FIG. 9H  is a root end view of the blade of  FIG. 9A  along arrow  9 H. 
         Fourth Embodiment Curved Wide Tip End Blades 
         [0090]      FIG. 10A  is a top perspective view of a fourth embodiment efficient traditionally appearing ceiling fan blade with aerodynamical upper surfaces and curved wide tip end. 
           [0091]      FIG. 10B  is a bottom perspective view of the blade of  FIG. 10A . 
           [0092]      FIG. 10C  is a top planar view of the blade of  FIG. 10A . 
           [0093]      FIG. 10D  is a bottom planar view of the blade of  FIG. 10A . 
           [0094]      FIG. 10E  is a left side view of the blade of  FIG. 10A  along arrow  10 E. 
           [0095]      FIG. 10F  is a right side view of the blade of  FIG. 10A  along arrow  10 F. 
           [0096]      FIG. 10G  is a tip end view of the blade of  FIG. 10A  along arrow  10 G. 
           [0097]      FIG. 10H  is a root end view of the blade of  FIG. 10A  along arrow  10 H. 
         Fifth Embodiment Separately Attachable Aerodynamic Surface 
         [0098]      FIG. 11  is tip end exploded view of a separate attachable aerodynamic surface that can be attached to conventional flat-planar surface ceiling fan blades. 
           [0099]      FIG. 12  is another view of  FIG. 11  with the aerodynamic surface attached to the blade. 
           [0100]      FIG. 13  is another version of the separately attachable aerodynamic surface with blade. 
       
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0101]    Before explaining the disclosed embodiments of the present invention in detail it is to be understood that the invention is not limited in its application to the details of the particular arrangement shown since the invention is capable of other embodiments. Also, the terminology used herein is for the purpose of description and not of limitation. 
         [0102]    The subject invention is a Continuation-In-Part of Design application Ser. No. 29/252,288 filed Jan. 20, 2006, which is incorporated by reference. 
         [0103]    Testing of novel ceiling fan blades were conducted in July-August 2005, and included three parameters of measurement data: airflow (meters per second (m/s), power (in watts) and speed (revolutions per minute (rpm)). Those novel ceiling fan blades far surpassed the operating performance of various traditional flat planar ceiling fans in operation. 
         [0104]    The tested blade had a reverse taper as compared to conventional blades. The tested blade was wider at the tip than the root. The first one tested had a flat bottom, a pitch of approximately 10 to approximately 12 degrees and an air foil (aerodynamic upper surface) on top (the upper surface). It is essentially a flat ceiling fan blade with an engineered air foil. We tested these by running an evaluation of a Huntington III in our lab and then changing to the new blades with the air foil on top. The short of the attached test results is that air flow was increased by approximately 10% at high speed to over approximately 26% at low speed. Again, this innovation is potentially revolutionary relative to reaching the EnergyStar designation with standard ceiling fans which is described below in relation to Table 5. 
         [0105]    While the novel blades look completely conventional when viewed from underneath, the novel blades perform considerably better relative to their air moving efficiency. Another test gave the novel blade a very slight twist. 
         [0106]    The modified blade is intended to move more air than the flat paddle blade, with the same input power. The aerodynamic upper surfaces allow the blade to work efficiently at both higher and lower RPM (revolutions per minute). To work effectively at lower RPM the blades can also be set at a higher pitch. The mounting brackets on the modified set of blades can be set to either a higher or lower pitch setting. 
         [0107]    The motor efficiency was expected to change with RPM. The modified aerodynamic blades were expected to work best in conjunction with a motor that has good efficiency at slower RPM. 
         [0108]    To separate the effects of aerodynamics and electrical motor performance a dynamometer set up was used for the testing procedures. A dynamometer measures torque and RPM. A torque sensor can be used where the motor mounts to the ceiling. With no other torques on the motor, the torque on the mount is the same as the torque on the turning shaft. The mechanical power going from the motor to the fan is equal to the torque times the RPM times a constant factor. 
         [0109]    In English units the torque in foot-lbs times the rotational speed in radians/second is the power in foot-lbs/second. In metric units the torque in newton-meters times the rotational speed in radians/second equals the power in watts. To convert RPM into radians/second, and rad/sec=2 PI×RPM/60. 
         [0110]    Laboratory tests were conducted on a standard ceiling fan with flat planar blades such as a 52″ Diameter Huntington III from Hampton Bay, which is sold by Home Depot, and the 52″ Hunter Silent(S) Breeze from Hunter Fan Company and compared against the novel efficient traditionally appearing ceiling fan blades, having aerodynamical upper surfaces. 
         [0111]    The novel efficient aerodynamic blades tested had dimensions of those described in reference to  FIGS. 1A-1G  below, where the blades had an overall length between root end  20  and tip end  10  of approximately 20 inches, where the root end can have a diameter of approximately 3.53 inches that widens outward along blade  1  to the tip end that can have a diameter of approximately 4.53 inches. 
         [0112]    Measurements were taken in an environmental chamber under controlled conditions using solid state measurement methods recommended by the United States Environmental Protection Agency in their Energy Star Ceiling Fan program which used a hot wire anemometer which required a temperature controlled room and a computer for testing data. 
         [0000]    http://www.energystar.gov/ia/partners/prod_development/revisions/downloads/ceil_fans/final.pdf 
         [0113]    In the tables below, air flow in CFM stands for cubic feet per minute, and power is measured in Watts (W). 
         [0114]    The tested aerodynamic novel efficient fan blades had an overall diameter of approximately 52 inches across five blades, powered by a triple capacitor Powermax 188 mm by 155 mm motor. The low speed RPM (revolutions per minute) of the HUNTINGTON III was approximately 88 RPM. The low speed of the HUNTER S BREEZE was approximately 55 RPM. The low speed of the EFFICIENT NOVEL BLADES was approximately 104 RPM. 
         [0115]    The data yielded the following improvements in Tables 1 and 2 at Low Speed of the Huntington III and the Hunter S Breeze each running at approximately 55 to approximately 88 RPM (revolutions per minute) and the novel efficient blades having a low speed of approximately 104 RPM. 
         [0116]    Table 1 indicates the velocity measured (m/s) underneath a ceiling mounted fan with measurement location (feet from center) for the three fans (Huntington III, Hunter S. Breeze and Novel Efficient Blades) for low speed operation of the fans. The measurements were made approximately 56″ inches above the floor, and a calibrated hot-wire anemometer was used to take the measurements. 
         [0000]    
       
         
               
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 1 
               
             
             
               
                   
               
               
                 Measurement 
                 Velocity Measured 
               
               
                 Location 
                 (m/s) 
               
             
          
           
               
                 (feet from center) 
                 Huntington III 
                 Hunter S. Breeze 
                 Novel Efficient 
               
               
                   
               
             
          
           
               
                 0 
                 0.440 
                 0.270 
                 0.820 
               
               
                 0.5 
                 0.270 
                 0.240 
                 0.910 
               
               
                 1 
                 0.420 
                 0.370 
                 0.990 
               
               
                 1.5 
                 0.520 
                 0.480 
                 0.780 
               
               
                 2 
                 0.510 
                 0.400 
                 0.460 
               
               
                 2.5 
                 0.330 
                 0.080 
                 0.200 
               
               
                 3 
                 0.160 
                 0.010 
                 0.180 
               
               
                 3.5 
                 0.100 
                 0.000 
                 0.120 
               
               
                 4 
                 0.100 
                 0.000 
                 0.090 
               
               
                 4.5 
                 0.080 
                 0.000 
                 0.080 
               
               
                 5 
                 0.030 
                 0.000 
                 0.080 
               
               
                 5.5 
                 0.030 
                 0.000 
                 0.030 
               
               
                   
               
             
          
         
       
     
         [0117]    TABLE 2 provides the average velocity (m/s), total CFM (cubic feet per minute), total Watts (power usage), and total CFM/Watts for the three fans (Huntington III, Hunter S. Breeze and Novel Efficient Blades) for low speed operation. 
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 2 
               
               
                   
               
               
                   
                   
                 Hunter 
                   
               
               
                 Fan Type 
                 Huntington III 
                 S. Breeze 
                 Novel Efficient 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Average Velocity (m/s) 
                 0.25 
                 0.15 
                 0.40 
               
               
                 Total CFM 
                 2136.6 
                 1396.1 
                 2711.8 
               
               
                 Total Watts 
                 14.3 
                 8.9 
                 14.3 
               
               
                 Total CFM/Watts 
                 149.4 
                 156.9 
                 189.6 
               
               
                   
               
             
          
         
       
     
         [0118]    As shown in Table 1 at low speed, absolute flow (CFM) (2711.8/2136.6) was increased by approximately 26.9% with efficiency (189/149.4) improved by a similar amount of approximately 26.5% when comparing the novel efficient fan blades over the Huntington III fan. 
         [0119]    Also, at low speed, absolute flow (CFM) (2711.8/1396.1) was increased by approximately 94% with efficiency (189/156.9) improved by approximately 20.45% when comparing the novel efficient fan blades over the Hunter S. Breeze fan. 
         [0120]    For Table 3, the high speed for the HUNTINGTON III was approximately 216 RPM, the high speed for the HUNTER S BREEZE was approximately 165 RPM. The high speed for the EFFICIENT NOVEL BLADES was approximately 248 RPM. 
         [0121]    Table 3 has data of High Speed of the Huntington III and the Hunter S Breeze each running at approximately 165 to approximately 216 RPM (revolutions per minute) and the novel efficient blades having a low speed of approximately 248 RPM. 
         [0122]    Table 3 indicates the velocity measured (m/s) underneath a ceiling mounted fan with measurement location (feet from center) for the three fans (Huntington III, Hunter S. Breeze and Novel Efficient Blades) for high speed operation of the fans. 
         [0000]    
       
         
               
               
             
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 3 
               
             
             
               
                   
               
               
                 Measurement 
                 Velocity Measured 
               
               
                 Location 
                 (m/s) 
               
             
          
           
               
                 (feet from center) 
                 Huntington III 
                 nter-Summer Breeze 
                 Novel Efficient 
               
               
                   
               
             
          
           
               
                 0 
                 0.790 
                 1.135 
                 1.040 
               
               
                 0.5 
                 0.770 
                 1.905 
                 1.330 
               
               
                 1 
                 1.430 
                 2.065 
                 2.110 
               
               
                 1.5 
                 1.450 
                 1.505 
                 2.130 
               
               
                 2 
                 1.250 
                 0.580 
                 0.960 
               
               
                 2.5 
                 0.850 
                 0.185 
                 0.690 
               
               
                 3 
                 0.500 
                 0.165 
                 0.370 
               
               
                 3.5 
                 0.280 
                 0.115 
                 0.230 
               
               
                 4 
                 0.170 
                 0.130 
                 0.200 
               
               
                 4.5 
                 0.130 
                 0.120 
                 0.200 
               
               
                 5 
                 0.130 
                 0.135 
                 0.200 
               
               
                 5.5 
                 0.110 
                 0.160 
                 0.200 
               
               
                   
               
             
          
         
       
     
         [0123]    TABLE 4 provides the average velocity (m/s), total CFM (cubic feet per minute), total Watts (power usage), and total CFM/Watts for the three fans (Huntington III, Hunter S. Breeze and Novel Efficient Blades) for high speed operation. 
         [0000]    
       
         
               
               
               
               
             
               
               
               
               
             
           
               
                 TABLE 4 
               
               
                   
               
               
                   
                   
                 Hunter- 
                 Novel 
               
               
                 Fan Type 
                 Huntington III 
                 Summer Breeze 
                 Efficient 
               
               
                   
               
             
             
               
                   
               
             
          
           
               
                 Average Velocity (m/s) 
                 0.66 
                 0.68 
                 0.81 
               
               
                 Total CFM 
                 5813.9 
                 4493.6 
                 6341.1 
               
               
                 Total Watts 
                 61.8 
                 74.8 
                 62.5 
               
               
                 Total CFM/Watts 
                 94.1 
                 60.1 
                 101.5 
               
               
                   
               
             
          
         
       
     
         [0124]    As shown in Table 4 at high speed, absolute flow (CFM) (6341.1/5813.9) was increased by approximately 9% with efficiency (101.5/94.1) improved by a similar amount of approximately 7.86% when comparing the novel efficient fan blades over the Huntington III fan. 
         [0125]    Also, at high speed, absolute flow (CFM) (6341.1/4493.6) was increased by approximately 41.1% with efficiency (101.5/60.1) improved by approximately 68.88% when comparing the novel efficient fan blades over the Hunter S. Breeze fan Although medium speed operation is not shown, extrapolating speeds between low and high, would show that the invention would have similar benefits over the Huntington III and Hunter S. Breeze ceiling fans. 
         [0126]    The United States government has initiated a program entitled: Energy Star (www.energystar.gov) for helping businesses and individuals to protect the environment through superior energy efficiency by reducing energy consumption and which includes rating appliances such as ceiling fans that use less power than conventional fans and produce greater cfm output. As of Oct. 1, 2004, the Environmental Protection Agency (EPA) has been requiring specific air flow efficiency requirements for ceiling fan products to meet the Energy Star requirements which then allow those products to be labeled Energy Star rated. Table 5 below shows the current Energy Star Program requirements for residential ceiling fans with the manufacturer setting their own three basic speeds of Low, Medium and High. 
         [0000]    
       
         
               
             
               
               
               
               
             
               
               
               
               
               
             
           
               
                 TABLE 5 
               
             
             
               
                   
               
               
                 Air Flow Efficiency Requirements(Energy Star) 
               
             
          
           
               
                   
                 Fan Speed 
                 Mininum Airflow 
                 Efficiency Requirement 
               
               
                   
                   
               
             
          
           
               
                   
                 Low 
                 1,250 CFM 
                 155 
                 CFM/Watt 
               
               
                   
                 Medium 
                 3,000 CFM 
                 100 
                 CFM/Watt 
               
               
                   
                 High 
                 5,000 CFM 
                 75 
                 CFM/Watt 
               
               
                   
                   
               
             
          
         
       
     
         [0127]    Note, that Energy Star program does not require what the speed ranges for RPM are used for low, medium and high, but rather that the flow targets are met: 
         [0128]    For Energy Star, residential ceiling fan airflow efficiency on a performance bases is measured as CFM of airflow per watt of power consumed by the motor and controls. This standard treats the motor, blades and controls as a system, and efficiency can be measured on each of three fan speeds (low, medium, high) using standard testing. 
         [0129]    From Table 5, it is clear that the efficient novel blades with upper aerodynamic surfaces running at all speeds of low, medium and high meet and exceed the Energy Star Rating requirements. 
         [0130]    Other embodiments can use as few as two, three, four, and even six efficient novel blades with upper aerodynamic surfaces. The blades can be formed from carved wood and/or injection molded plastic. The ceiling fan blades can have various diameters such as but not limited to approximately 42″, 46″, 48″, 52″, 54″, 56″, 60″ and even greater or less as needed. 
       First Embodiment Small Diameter Blades 
       [0131]    The labeled components will now be described.
     1  novel small diameter blade     5  dotted lines for motor mount arm connection     10  tip end     20  root end     30 LE leading edge     40 TE trailing edge     50  upper surface     60  lower surface   
 
         [0140]      FIG. 1A  is a top perspective view of a first embodiment efficient traditionally appearing ceiling fan blade  1  with aerodynamical upper surfaces  50  and wide tip end  10 .  FIG. 1B  is a bottom perspective view of the blade  1  of  FIG. 1A  with planar/flat appearing lower surface  60 .  FIG. 1C  is a top planar view of the blade  1  of  FIG. 1A  showing upper surface  50 .  FIG. 1D  is a bottom planar view of the blade  1  of  FIG. 1A .  FIG. 1E  is a left side view of the blade  1  of  FIG. 1A  along arrow  1 E with leading edge  30 LE.  FIG. 1F  is a right side view of the blade  1  of  FIG. 1A  along arrow  1 F with trailing edge  40 TE  FIG. 1G  is a tip end  10  view of the blade  1  of  FIG. 1A  along arrow  1 G.  FIG. 1H  is a root end  20  view of the blade  1  of  FIG. 1A  along arrow  1 H. Referring to  FIGS. 1A-1G , the novel blade can have an overall length between root end  20  and tip end  10  of approximately 20 inches, where the root end can have a diameter of approximately 3.53 inches that widens outward along blade  1  to the tip end that can have a diameter of approximately 4.53 inches. The tip end  10  and root end  20  can have flat generally flat face ends. The undersurface  60  of blade  1  can be flat and planar so as to appear to be a traditionally appearing flat sided blade when viewed from underneath the blades when mounted to a ceiling fan. 
         [0141]    The upper surface  50  can have an efficient aerodynamic surface with a rounded leading edge  30 LE, and a blunt tipped trailing edge  40 TE. The upper surfaces of the blade  1  can include an upwardly curving slope from the rounded leading edge  30 LE to a point of maximum thickness, the point being closer to the leading edge  30 LE than to the trailing edge  40 TE. The upper surface can also include a downwardly curving slope from the maximum thickness point to the blunt tipped trailing edge  40 TE. The thickness along this maximum thickness point can run along a longitudinal axis from the root end to the tip end, and this maximum thickness can be thicker than the thickness along either or both of the leading edge  30 LE and the trailing edge  40 TE. 
         [0142]      FIG. 2  is another top perspective view of the efficient traditionally appearing ceiling fan blade  1  with aerodynamical upper surfaces  50  and wide tip end  10  of  FIG. 1A  with labeled cross-sections A, B, C, D, E, F, G, H, I.  FIG. 3  is another top view of the efficient traditionally appearing ceiling fan blade  1  with aerodynamical upper surfaces  50  of  FIG. 1A  with labeled cross-sections A-I. 
         [0143]    Referring to  FIGS. 2-3 , blade  1  has an overall length of approximately 20″ and a width that varies from the root end  20  being approximately 3.53″ to the tip end  10  being approximately 4.53″. Cross-section A is taken at the tip end  10  with cross-section B approximately 1″ in and cross-sections C, D, E, F, G, H spaced approximately 3″ apart from one another. Cross-section I is taken a root end  20  with cross-section H approximately 1″ from root end  20 .  FIGS. 4A-4I  are individual cross-sectional views of  FIGS. 2-3  taken in the direction of arrow C 
         [0144]      FIG. 4A  shows the cross-section A of  FIGS. 2-3  having a width of approximately 4.53″, a flat bottom and an aerodynamic upper surface that starts from blunt trailing edge  40 TE sloping upward along a convex curve to a halfway thickness of approximately 0.27″ to a maximum thickness of the section A being approximately 0.32″ that is spaced approximately 1.82″ from the rounded leading edge  30 LE. A halfway thickness of approximately 0.29″ is located on a downwardly convex curve slope between the maximum thickness point and the rounded leading edge  30 LE. 
         [0145]      FIG. 4B  shows the cross-section B of  FIGS. 2-3  having a width of approximately 4.48″, a flat bottom and an aerodynamic upper surface that starts from blunt trailing edge  40 TE sloping upward along a convex curve to a halfway thickness of approximately 0.26″ to a maximum thickness of the section B being approximately 0.31″ that is spaced approximately 1.78″ from the rounded leading edge  30 LE. A halfway thickness of approximately 0.29″ is located on a downwardly convex curve slope between the maximum thickness point and the rounded leading edge  30 LE. 
         [0146]      FIG. 4C  shows the cross-section C of  FIGS. 2-3  having a width of approximately 4.33″, a flat bottom and an aerodynamic upper surface that starts from blunt trailing edge  40 TE sloping upward along a convex curve to a halfway thickness of approximately 0.24″ to a maximum thickness of the section C being approximately 0.30″ that is spaced approximately 1.99″ from the rounded leading edge  30 LE. A halfway thickness of approximately 0.29″ is located on a downwardly convex curve slope between the maximum thickness point and the rounded leading edge  30 LE. 
         [0147]      FIG. 4D  shows the cross-section D of  FIGS. 2-3  having a width of approximately 4.18″, a flat bottom and an aerodynamic upper surface that starts from blunt trailing edge  40 TE sloping upward along a convex curve to a halfway thickness of approximately 0.24″ to a maximum thickness of the section D being approximately 0.29″ that is spaced approximately 1.90″ from the rounded leading edge  30 LE. A halfway thickness of approximately 0.28″ is located on a downwardly convex curve slope between the maximum thickness point and the rounded leading edge  30 LE. 
         [0148]      FIG. 4E  shows the cross-section E of  FIGS. 2-3  having a width of approximately 4.03″, a flat bottom and an aerodynamic upper surface that starts from blunt trailing edge  40 TE sloping upward along a convex curve to a halfway thickness of approximately 0.23″ to a maximum thickness of the section E being approximately 0.28″ that is spaced approximately 1.81″ from the rounded leading edge  30 LE. A halfway thickness of approximately 0.27″ is located on a downwardly convex curve slope between the maximum thickness point and the rounded leading edge  30 LE. 
         [0149]      FIG. 4F  shows the cross-section F of  FIGS. 2-3  having a width of approximately 3.88″, a flat bottom and an aerodynamic upper surface that starts from blunt trailing edge  40 TE sloping upward along a convex curve to a halfway thickness of approximately 0.22″ to a maximum thickness of the section F being approximately 0.27″ that is spaced approximately 1.73″ from the rounded leading edge  30 LE. A halfway thickness of approximately 0.26″ is located on a downwardly convex curve slope between the maximum thickness point and the rounded leading edge  30 LE. 
         [0150]      FIG. 4G  shows the cross-section G of  FIGS. 2-3  having a width of approximately 3.73″, a flat bottom and an aerodynamic upper surface that starts from blunt trailing edge  40 TE sloping upward along a convex curve to a halfway thickness of approximately 0.22″ to a maximum thickness of the section G being approximately 0.27″ that is spaced approximately 1.70″ from the rounded leading edge  30 LE. A halfway thickness of approximately 0.25″ is located on a downwardly convex curve slope between the maximum thickness point and the rounded leading edge  30 LE. 
         [0151]      FIG. 4H  shows the cross-section H of  FIGS. 2-3  having a width of approximately 3.58″, a flat bottom and an aerodynamic upper surface that starts from blunt trailing edge  40 TE sloping upward along a convex curve to a halfway thickness of approximately 0.21″ to a maximum thickness of the section H being approximately 0.27″ that is spaced approximately 1.63″ from the rounded leading edge  30 LE. A halfway thickness of approximately 0.26″ is located on a downwardly convex curve slope between the maximum thickness point and the rounded leading edge  30 LE. 
         [0152]      FIG. 4I  shows the cross-section I of  FIGS. 2-3  having a width of approximately 3.53″, a flat bottom and an aerodynamic upper surface that starts from blunt trailing edge  40 TE sloping upward along a convex curve to a halfway thickness of approximately 0.21″ to a maximum thickness of the section I being approximately 0.26″ that is spaced approximately 1.60″ from the rounded leading edge  30 LE. A halfway thickness of approximately 0.24″ is located on a downwardly convex curve slope between the maximum thickness point and the rounded leading edge  30 LE. 
       Second Embodiment Large Diameter Blades 
       [0153]    The labeled components will now be described.
     101  novel large diameter blade     105  dotted lines for motor mount arm connection     110  tip end     120  root end     130 LE leading edge     140 TE trailing edge     150  upper surface     160  lower surface   
 
         [0162]      FIG. 5  is a top perspective view of a second embodiment of a large efficient traditionally appearing ceiling fan blade  101  with aerodynamical upper surfaces  150  and wide tip end  110  with labeled cross-sections A, B, C, D, E, F, G, H.  FIG. 6  is a top view of the large efficient traditionally appearing ceiling fan blade  101  with aerodynamical upper surfaces  150  of  FIG. 5  with labeled cross-sections A-H. 
         [0163]    Referring to  FIGS. 5-6 , blade  101  has an overall length of approximately 21.08″ and a width that varies from the root end  120  being approximately 4.85″ to the tip end  110  being approximately 5.95″Cross-section A is taken at the tip end  110  with cross-section B approximately 1″ in and cross-sections C, D, E, F, G spaced approximately 3.96″ apart from one another. Cross-section H is taken a root end  120  with cross-section G approximately 1″ from root end  120 .  FIGS. 4A-4H  are individual cross-sectional views of  FIGS. 5-6  taken in the direction of arrow C. 
         [0164]      FIG. 7A  shows the cross-section A of  FIGS. 5-6  having a width of approximately 5.95″, a flat bottom and an aerodynamic upper surface that starts from blunt trailing edge  140 TE sloping upward along a convex curve to a halfway thickness of approximately 0.33″ to a maximum thickness of the section A being approximately 0.41″ that is spaced approximately 2.70″ from the rounded leading edge  130 LE. A halfway thickness of approximately 0.39″ is located on a downwardly convex curve slope between the maximum thickness point and the rounded leading edge  130 LE. 
         [0165]      FIG. 7B  shows the cross-section B of  FIGS. 5-6  having a width of approximately 5.90″, a flat bottom and an aerodynamic upper surface that starts from blunt trailing edge  140 TE sloping upward along a convex curve to a halfway thickness of approximately 0.32″ to a maximum thickness of the section B being approximately 0.41″ that is spaced approximately 2.70″ from the rounded leading edge  130 LE. A halfway thickness of approximately 0.39″ is located on a downwardly convex curve slope between the maximum thickness point and the rounded leading edge  130 LE. 
         [0166]      FIG. 7C  shows the cross-section C of  FIGS. 5-6  having a width of approximately 5.70″, a flat bottom and an aerodynamic upper surface that starts from blunt trailing edge  140 TE sloping upward along a convex curve to a halfway thickness of approximately 0.31″ to a maximum thickness of the section C being approximately 0.40″ that is spaced approximately 2.60″ from the rounded leading edge  130 LE. A halfway thickness of approximately 0.38″ is located on a downwardly convex curve slope between the maximum thickness point and the rounded leading edge  130 LE. 
         [0167]      FIG. 7D  shows the cross-section D of  FIGS. 5-6  having a width of approximately 5.50″, a flat bottom and an aerodynamic upper surface that starts from blunt trailing edge  140 TE sloping upward along a convex curve to a halfway thickness of approximately 0.31″ to a maximum thickness of the section D being approximately 0.39″ that is spaced approximately 2.46″ from the rounded leading edge  130 LE. A halfway thickness of approximately 0.36″ is located on a downwardly convex curve slope between the maximum thickness point and the rounded leading edge  130 LE. 
         [0168]      FIG. 7E  shows the cross-section E of  FIGS. 5-6  having a width of approximately 5.30″, a flat bottom and an aerodynamic upper surface that starts from blunt trailing edge  140 TE sloping upward along a convex curve to a halfway thickness of approximately 0.31″ to a maximum thickness of the section E being approximately 0.37″ that is spaced approximately 2.38″ from the rounded leading edge  130 LE. A halfway thickness of approximately 0.35″ is located on a downwardly convex curve slope between the maximum thickness point and the rounded leading edge  130 LE. 
         [0169]      FIG. 7F  shows the cross-section F of  FIGS. 5-6  having a width of approximately 5.10″, a flat bottom and an aerodynamic upper surface that starts from blunt trailing edge  140 TE sloping upward along a convex curve to a halfway thickness of approximately 0.29″ to a maximum thickness of the section F being approximately 0.36″ that is spaced approximately 2.29″ from the rounded leading edge  130 LE. A halfway thickness of approximately 0.35″ is located on a downwardly convex curve slope between the maximum thickness point and the rounded leading edge  130 LE. 
         [0170]      FIG. 7G  shows the cross-section G of  FIGS. 5-6  having a width of approximately 4.90″, a flat bottom and an aerodynamic upper surface that starts from blunt trailing edge  140 TE sloping upward along a convex curve to a halfway thickness of approximately 0.30″ to a maximum thickness of the section G being approximately 0.36″ that is spaced approximately 2.24″ from the rounded leading edge  130 LE. A halfway thickness of approximately 0.33″ is located on a downwardly convex curve slope between the maximum thickness point and the rounded leading edge  130 LE. 
         [0171]      FIG. 7H  shows the cross-section H of  FIGS. 5-6  having a width of approximately 4.85″, a flat bottom and an aerodynamic upper surface that starts from blunt trailing edge  140 TE sloping upward along a convex curve to a halfway thickness of approximately 0.29″ to a maximum thickness of the section H being approximately 0.35″ that is spaced approximately 2.22″ from the rounded leading edge  130 LE. A halfway thickness of approximately 0.33″ is located on a downwardly convex curve slope between the maximum thickness point and the rounded leading edge  13  OLE. 
         [0172]      FIG. 8A  is a perspective bottom view of a ceiling fan  200  and efficient blades  1 / 101  of  FIGS. 1-7I , with the blades  1 / 101  attached a ceiling mounted motor  210 .  FIG. 8B  is a perspective top view of the ceiling fan  200  and efficient blades  1 / 101  of  FIG. 8A .  FIG. 8C  is a side perspective view of the ceiling fan  100  and efficient blades  1 / 101  of  FIG. 8A .  FIG. 8D  is a bottom view of the ceiling fan  200  and efficient blades  1 / 101  of  FIG. 8A .  FIG. 8E  is a top view of the ceiling fan  200  and efficient blades  1 / 101  of  FIG. 8A . 
         [0173]    Referring to  FIGS. 8A-8E , one viewing beneath the ceiling fan would see bottom surfaces  60 / 160  that appear to be traditionally flat/planar ceiling fan blades. With the aerodynamical upper surfaces  50 / 150  not visible from ground level. The novel blades  1 / 101  can be mounted at angles or twisted by respective mounting arms  250  to further maximize airflow. 
       Third Embodiment Rounded Wide Tip End Blades 
       [0174]    The labeled components will now be described.
     301  novel efficient aerodynamic blade with rounded tip end     305  dotted lines for motor mount arm connection     310  tip end     320  root end     330 LE leading edge     340 TE trailing edge     350  upper surface     360  lower surface   
 
         [0183]      FIG. 9A  is a top perspective view of a third embodiment efficient traditionally appearing ceiling fan blade  301  with aerodynamical upper surfaces  350  and rounded wide tip end  310 .  FIG. 9B  is a bottom perspective view of the blade  301  of  FIG. 9A .  FIG. 9C  is a top planar view of the blade  301  of  FIG. 9A .  FIG. 9D  is a bottom planar view of the blade  301  of  FIG. 9A .  FIG. 9E  is a left side view of the blade  301  of  FIG. 9A  along arrow  9 E.  FIG. 9F  is a right side view of the blade of  FIG. 9A  along arrow  9 F.  FIG. 9G  is a tip end  310  view of the blade  301  of  FIG. 9A  along arrow  9 G.  FIG. 9H  is a root end  320  view of the blade  301  of  FIG. 9A  along arrow  9 H. Referring to  FIGS. 9A ,  9 H, the third embodiment has similar attributes to that of the preceding embodiments with the addition of having the tip end  310  being rounded. 
       Fourth Embodiment Curved Wide Tip End Blades 
       [0184]    The labeled components will now be described.
     401  novel efficient aerodynamic blade with curved tip end     405  dotted lines for motor mount arm connection     410  tip end     420  root end     430  leading edge     440  trailing edge     450  upper surface     460  lower surface   
 
         [0193]      FIG. 10A  is a top perspective view of a fourth embodiment efficient traditionally appearing ceiling fan blade  401  with aerodynamical upper surfaces  450  and curved wide tip end  410 .  FIG. 10B  is a bottom perspective view of the blade  401  of  FIG. 10A .  FIG. 10C  is a top planar view of the blade  401  of  FIG. 10A .  FIG. 10D  is a bottom planar view of the blade  401  of  FIG. 10A .  FIG. 10E  is a left side view of the blade  401  of  FIG. 10A  along arrow  10 E.  FIG. 10F  is a right side view of the blade  401  of  FIG. 10A  along arrow  10 F.  FIG. 10G  is a tip end  410  view of the blade of  FIG. 10A  along arrow  10 G.  FIG. 10H  is a root end  420  view of the blade of  FIG. 10A  along arrow  10 H. Referring to  FIGS. 10A-10H , the fourth embodiment has similar attributes to that of the preceding embodiments with the addition of having the tip end  410  being curved. 
       Fifth Embodiment Separately Attachable Aerodynamic Surface 
       [0194]    The labeled components will now be described.
     501  novel blade with attachable upper aerodynamic surface     560  tip end     570  root end     530  leading edge     540  trailing edge     550  Separately attachable aerodynamic upper surface     505  Lower traditional flat planar sided blade   
 
         [0202]      FIG. 11  is tip end exploded view of a separate attachable aerodynamic surface form  550  that can be attached to conventional flat-planar surface ceiling fan blades  505 .  FIG. 12  is another view of  FIG. 11  with the aerodynamic surface  550  attached to the blade  505 . A traditional blade  505  can have existing flat/planar upper surface  510  and flat/planar lower surface  520 . A separate form  550  can have a flat lower surface  555 , and aerodynamic upper surface  557 . The lower surface  555  can be attached to the existing upper flat/planar surface  510  of the traditional blades  505  by glue, cement, and the like, and/or using fasteners such as but not limited to screws, and the like, where the resulting blade  501  can have similar dimensions and the resulting benefits as the previous embodiments described above. 
         [0203]      FIG. 13  is another version  581  of the separately attachable aerodynamic surface  580  with blade  560 / 570 . The add-on  580  can have an upper aerodynamic surface that slopes upward from trailing edge  582  and curves down to an overhanging rounded leading edge  588  to fit about the leading edge of the underlying flat blade  560 / 570 . The add-on can be attached similar to the add-on previously described. 
         [0204]    The preferred embodiments can be used with blades that rotate clockwise or counter-clockwise, where the blades can be positioned to maximize airflow in either rotational directions. 
         [0205]    While the preferred embodiment includes providing aerodynamic surfaces on the upper surface of planar/flat bladed fans, the invention can be practiced with other ceiling fan blades that can achieve enhanced airflow and efficiency results. For example, design and aesthetic appearing blades can include upper surfaces that have the efficient aerodynamic efficient surfaces. 
         [0206]    The blade mounting arms can also be optimized in shape to allow the blades to optimize pitch for optimal airflow with or without the efficient aerodynamic upper surface blades. 
         [0207]    Although the preferred embodiments show the efficient aerodynamic surfaces on the top of the blades, the blades can alternatively also have aerodynamic efficient surfaces on the bottom side. Alternatively, both the top and bottom surfaces can have the novel aerodynamic efficient surfaces. 
         [0208]    While the invention has been described, disclosed, illustrated and shown in various terms of certain embodiments or modifications which it has presumed in practice, the scope of the invention is not intended to be, nor should it be deemed to be, limited thereby and such other modifications or embodiments as may be suggested by the teachings herein are particularly reserved especially as they fall within the breadth and scope of the claims here appended.

Technology Classification (CPC): 5