Abstract:
The invention disclosed provides a rotary coupling mechanism that securely attaches common household fixtures to a wall. The invention is comprised of a wall bracket, a base bracket, a cam pin, and two mounting screws. Flanges on the base bracket rotationally engage flanges on the wall bracket and the cam pin inserted through the base bracket rotates to hold the flanges and secure the base bracket to the wall bracket. An alternate embodiment of the invention is comprised of a wall bracket and a base bracket having flanges with canted surfaces. A locking pin holds the brackets together after the flanges are rotationally engaged. For each application of the coupling mechanism, a decorative body conceals the apparatus. The decorative body is rigidly connected or pivotally connected to a decorative cap. The decorative cap retains various household fixtures such as paper holders, towel racks, or shelves.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention relates to a coupling mechanism. In particular, the invention relates to a rotary coupling mechanism secured to a wall and used to support various decorative and functional fixtures in a household. 
       BACKGROUND OF THE INVENTION 
       [0002]    In the prior art, kitchen and bathroom fixtures such as paper holders, shelves and towel rods are secured to vertical walls with mounting devices made of various compositions. Generally, the walls are drywall or sheetrock and in some cases include a tile or stone facade. The prior art mounting devices are generally comprised of two pieces. The first piece usually includes a flat plate having angled flanges affixed to the wall with screws or bolts. The second piece is usually a decorative cover affixed to the plate through the use of set screws. The set screws thread through the lower plate and engage the angled flanges. The typical prior art mounting devices are unacceptable because many times, the set screws are small, making them difficult to adjust. Also, the set screws are generally incapable of bearing the load required because of their small size and therefore, are prone to becoming loose and ultimately dislodging from the wall. 
         [0003]    Typical of the prior art is U.S. Pat. No. 4,979,713 to Bell. Bell discloses a towel rack mounting device that includes a triangular bracket designed to be mounted on a wall. The bracket has three flanges oriented in a triangular array. The circular base is locked onto the bracket by threading a set screw through the wall of the circular base and into contact with one of the flanges. The remaining flanges engage a groove on the base. The set screw applies pressure to an angled surface which tends to move the circular base and the bracket away from the wall. 
         [0004]    U.S. Pat. No. 5,875,903 to Chen discloses a bathroom hanger rack that incorporates a bracket mounted to the wall having an interiorly threaded cylindrical post extending from the wall. A decorative casing is secured to the post with a threaded attachment. A rod extends between two decorative casings and a decorative cap is threaded to the top of each casing. 
         [0005]    U.S. Patent Application No. 2002/0088764 to Pan discloses a towel rack comprised of two fastening bases, two retaining heads, and a towel rod. Each fastening base includes a post having two recessed grooves. A first set screw holds the towel rod in a retaining head. A second set screw secures the retaining head to the post extending from the fastening base. The towel rod must be secured to each retaining head before securing the retaining heads to their respective fastening bases. The use of one laterally opposed set screw tends to tilt the retaining head away from the wall and therefore is prone to becoming loose. 
         [0006]    U.S. Patent Application No. 2002/0104946 to Lai discloses a structure for holding a towel rack and the like. Two stanchions are included. Each includes a base, a disk, a decorative cover, and a head. Each base is fastened to the wall. Each base includes a center post with an angled notch. The disk covers the base, and the decorative cover engages the disk with tabs. The head engages the decorative cover through additional tabs and is provided with a hole for retaining the towel rod. The center post of the base extends through the disk, the decorative cover, and into the head. A single set screw through the head engages the angled notch in the post and presses the head, the decorative cover, and the disk to the base. The same potential problems exist with the set screw. 
       SUMMARY OF INVENTION 
       [0007]    The preferred embodiment of the present invention provides a rotary coupling mechanism that securely attaches common household fixtures to a wall. The invention allows the fixtures to be mounted quickly and easily to the wall and further conceals all mounting hardware. The invention is designed to not distract from the decorative features of the fixtures and can be used with various fixtures common to a bathroom or kitchen such as paper holders, towel rods, or shelves. Depending on the specific fixture to be mounted, more than one rotary coupling mechanism may be required. 
         [0008]    Accordingly, an embodiment of the present invention provides a rotary coupling mechanism for mounting a pivoting paper holder to a wall. The pivoting paper holder has two mounting points and thus includes two rotary coupling mechanisms. Each coupling mechanism includes a wall bracket, a base bracket, a cam pin, and a pair of mounting screws. Horizontal flanges on the base bracket rotationally engage horizontal flanges on the wall bracket. A turn of the cam pin forces the wall bracket and the base bracket together and prevents separation. Each coupling mechanism is concealed by a decorative body and a decorative cap. The decorative body is connected to the base bracket. A shoulder bolt pivotally connects the decorative body to the decorative cap. A nylon bushing between the body and the cap eases rotation by preventing metal to metal contact. A second shoulder bolt and a pair of dowels rigidly connect a second decorative body to a second decorative cap preventing rotation of the cap relative to the body. The first decorative cap pivots and holds a rod while the second decorative cap remains stationary and holds a catch with which the rod cooperates. 
         [0009]    An alternate embodiment of the rotary coupling mechanism incorporates a wall bracket and a base bracket each having slanted surfaces on the flanges. A locking pin is mounted on the base bracket in a position which allows its rotation. As the base bracket is rotated on the wall bracket the angled surfaces on the flanges pull the base bracket towards the wall bracket. The locking pin rotates into a mechanical locking position which locks the base bracket and wall bracket together. The base bracket is connected to the decorative cap which conceals the device. 
         [0010]    Those skilled in the art will further appreciate the above-mentioned features and advantages of the invention together with other important aspects upon reading the detailed description that follows in conjunction with the drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0011]    In the detailed description of the preferred embodiments presented below, reference is made to the accompanying drawings. 
           [0012]      FIG. 1  is an isometric view of a wall bracket of a preferred embodiment of the present invention. 
           [0013]      FIG. 2  is a plan view of the underside of a wall bracket of a preferred embodiment of the present invention. 
           [0014]      FIG. 3  is an isometric view of a base bracket of a preferred embodiment of the present invention. 
           [0015]      FIG. 4  is a plan view of the underside of a base bracket of a preferred embodiment of the present invention. 
           [0016]      FIG. 5  is an isometric view of a decorative body of a preferred embodiment of the present invention. 
           [0017]      FIG. 6  is an isometric view of the underside of a decorative body of a preferred embodiment of the present invention. 
           [0018]      FIG. 7  is an elevation view of a decorative body along line  7 - 7  of  FIG. 5  of a preferred embodiment of the present invention. 
           [0019]      FIG. 8  is an isometric view of a decorative cap of a preferred embodiment of the present invention. 
           [0020]      FIG. 9  is an elevation view of a decorative cap of a preferred embodiment of the present invention. 
           [0021]      FIG. 10A  is an isometric view of a cam pin of a preferred embodiment of the present invention. 
           [0022]      FIG. 10B  is an isometric view of a cam pin of an alternate preferred embodiment of the present invention. 
           [0023]      FIG. 11  is an elevation view of an insert of a preferred embodiment of the present invention. 
           [0024]      FIG. 12  is an isometric view of a bushing of a preferred embodiment of the present invention. 
           [0025]      FIG. 13  is an exploded isometric view of a preferred embodiment of the present invention. 
           [0026]      FIG. 14  is an elevation view of a preferred embodiment of the present invention along line  14 - 14  of  FIG. 13 . 
           [0027]      FIG. 15  is a plan view of a wall bracket of an alternate preferred embodiment of the present invention. 
           [0028]      FIG. 16  is an elevation view of a wall bracket of an alternate preferred embodiment of the present invention. 
           [0029]      FIG. 17  is a plan view of a base bracket of an alternate preferred embodiment of the present invention. 
           [0030]      FIG. 18  is an elevation view of a base bracket of an alternate preferred embodiment of the present invention. 
           [0031]      FIG. 19  is a partial isometric view of a locking pin and spring of an alternate preferred embodiment of the present invention. 
           [0032]      FIG. 20  is an elevation view of a locking pin of an alternate preferred embodiment of the present invention. 
           [0033]      FIG. 21  is an isometric view of a locking pin of an alternate preferred embodiment of the present invention. 
           [0034]      FIG. 22A  is a partial elevation view showing the initial position of a locking pin relative to a wall bracket during installation of an alternate preferred embodiment of the present invention. 
           [0035]      FIG. 22B  is a partial elevation view showing the rotated position of a locking pin relative to a wall bracket during installation of an alternate preferred embodiment of the present invention. 
           [0036]      FIG. 22C  is a partial elevation view showing the locked position of a locking pin relative to a wall bracket during installation of an alternate preferred embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0037]    In the descriptions that follow, like parts are marked throughout the specification and drawings with the same numerals, respectively. The drawing figures are not necessarily drawn to scale and certain figures may be shown in exaggerated or generalized form in the interest of clarity and conciseness. 
         [0038]      FIGS. 1 and 2  show wall bracket  100 . Wall bracket  100  is generally cylindrical in shape. Wall bracket  100  is enclosed on one end by base  102 . Base  102  extends past the cylindrical wall of wall bracket  100  to form lip  104 . Flanges  110 ,  111 ,  112 , and  113  extend outwardly from the open end of wall bracket  100 . In the preferred embodiment, flanges  110 ,  111 ,  112 , and  113  are spaced at 90° intervals around wall bracket  100  and each occupies between about 40° and 45° of the perimeter of wall bracket  100 . Wall bracket  100  further includes a centrally located boss  106  which extends from the center of base  102 . Two diametrically opposed oblong openings, mounting holes  116  and  118 , flank boss  106 . Spacers  120  and  122  are protrusions located on flanges  110  and  112  respectively. Semicircular indentions  124  and  126  are oblong and concentrically centered around mounting holes  116  and  118 , respectively. Semicircular indentions  124  and  126  are located on the underside of base  102  and are roughly half the depth of base  102 . 
         [0039]    Referring to  FIGS. 3 and 4 , there is shown base bracket  200 . Base bracket  200  is generally cylindrical in shape and is enclosed on one end by base housing  220 . Lip  202  extends outwardly from the open end of base bracket  200 . Included on lip  202  are base holes  204 ,  205 ,  206 , and  207 . Base holes  204 ,  205 ,  206 , and  207  are circular in shape and each includes a beveled perimeter on the underside of lip  202 . Cam channel  216  is a radially extending semicircular groove in the top side of lip  202  which leads to cam hole  218 . Cam hole  218  extends to the interior of base bracket  200 . Hole  210  is concentrically aligned with base housing  220 . Slots  211 ,  212 , and  213  are arcuate holes through base housing  220 . Slots  211 ,  212 , and  213  are located 90° from each other with slots  211  and  213  being diametrically opposed along the perimeter of base housing  220 . Located in alignment with slots  211 ,  212 , and  213  are base flanges  224 ,  225 , and  226  respectively. Base flanges  224 ,  225 , and  226  extend perpendicularly from the interior of base bracket  200  towards hole  210 . Each flange occupies between about 35° and 40° of the circular shape of base bracket  200 . 
         [0040]    In the preferred embodiment, wall bracket  100  and base bracket  200  are typically constructed of cast aluminum or zinc alloy, but can also be formed of injection molded plastic or nylon. 
         [0041]      FIGS. 5 ,  6 , and  7  show body  300 . In the preferred embodiment, body  300  is a hollow “bell shaped” decorative cover including flattened enclosed top  316  and an open end  317 . Other shapes of course will function as well. Flattened top  316  includes bushing hole  302  and two diametrically opposed dowel holes  304  and  305  flanking bushing hole  302 . Collar  318  defines the circular shape of bushing hole  302 . Collar  318  is a hollow cylinder shape extending from the underside of flattened top  316  toward the interior of body  300 . The perimeter of open end  317  is surrounded by brim  310 . Brim  310  includes cam slot  308 . Cam slot  308  provides an opening through brim  310  and cam support  320  extends cam slot  308  into the interior of body  300 . The interior of body  300  also includes stanchions  312 ,  313 ,  314 , and  315 . Stanchions  312 ,  313 ,  314 , and  315  define circular holes used for mounting body  300  to base bracket  200 . 
         [0042]    Referring to  FIGS. 8 and 9 , cap  400  is shown. Cap  400  is an integrally formed decorative piece having an elbow shape. Cap arm  422  is configured to fit perpendicularly with cap base  420  to form the elbow shape. Cap arm  422  includes a solid decorative end  418 . In the preferred embodiment, end  418  is generally cylindrical including varying aesthetic shapes, but other designs may also be employed. Opposite end  418 , cap arm  422  also includes catch receiver  414 . Catch receiver  414  includes catch hole  416 . Cap base  420  is generally bell shaped and includes various aesthetic designs. In alternate embodiments, cap base  420  may be other shapes such as spheres, pyramids, or cubes and include varying rings and slopes for decorative effect. Cap base  420  includes cylindrical indention  404 , bolt hole  412 , and dowel holes  406 ,  407 ,  408 , and  409 . Cylindrical indention  404  is a circular shaped space on one end of cap base  420  defined by brim  402 . Bolt hole  412  is concentrically aligned with cap base  420  and cylindrical indention  404 . Bolt hole  412  creates a cylindrical channel through cap base  420  and into the interior of catch receiver  414 . Dowel holes  406 ,  407 ,  408 , and  409  are four cylindrical shaped cavities extending from cylindrical indention  404  toward cap arm  422 . 
         [0043]    Referring  FIG. 10A , cam pin  148  is shown. Cam pin  148  is a cylindrical rod having a tool receptacle  160  on one end and cam surface  162  on the opposite end. Tool receptacle  160  may be formed to receive a flathead, a crosshead, a hex key or any such similar type driver capable of applying a torsional force to cam pin  148 . Cam surface  162  is die cut to include teeth  166 . In the preferred embodiment, teeth  166  are generally perpendicular to the longitudinal axis of cam pin  148  but may also have a helical pattern. Cam surface  162  further includes two diametrically opposed and parallel flat surfaces  164 . In the preferred embodiment, cam pin  148  is made of stainless steel but can also be made of other metals or alloys with similar rigid properties. 
         [0044]      FIG. 10B  shows an alternate embodiment of the cam pin. Cam pin  149  is also a cylindrical shaft and has receptacle  161  on one end and cam surface  163  on the opposite end. Receptacle  161  is shaped to receive a torque applying tool. Cam surface  163  is an oval shaped cam eccentrically positioned with respect to the longitudinal axis of cam pin  149 . 
         [0045]      FIG. 11  shows insert  500 . Insert  500  is an integrally formed solid piece comprising of two cylindrical shapes, body  502  and catch  506 , adjacent to each other. Catch  506  is concentrically aligned with body  502  and has a diameter which is less than the diameter of body  502 . The different diameters of body  502  and catch  506  create shoulder  508  located where body  502  and catch  506  meet. Body  502  has a diameter slightly less than catch hole  416 . Body  502  is sized to fit into catch hole  416 . Body  502  includes a canted edge bevel  510 . Body  502  further includes bolt hole  504 . Bolt hole  504  is a cylindrical channel perpendicular to the central axis of insert  500 . Bolt hole  504  is threaded to receive shoulder bolt  150 . Catch  506  includes a canted edge bevel  512 . 
         [0046]    Referring to  FIG. 12 , bushing  600  is shown. In the preferred embodiment, bushing  600  is made of nylon and is comprised of a hollow cylindrical shaped hub  602  and an adjacent flat disk shaped seat  604 . Hub  602  and seat  604  are integrally formed and their circular shapes are concentrically aligned. Hub  602  has a diameter slightly smaller than bushing hole  302  in order to be received by bushing hole  302 . Seat  604  has a diameter slightly smaller than the interior diameter of brim  402  in order to be seated in cylindrical indention  404 . Bolt hole  610  is a cylindrical channel with a diameter slightly larger than shoulder bolt  150  and is concentrically aligned with seat  604 . Bolt hole  610  passes through seat  604  and the entire length of hub  602 . Two diametrically opposed holes, dowel holes  606  and  608 , pass through seat  604  and flank bolt hole  610 . 
         [0047]    In the preferred embodiment, body  300 , cap  400 , insert  500 , and rod  700  are typically cast from of a lightweight metal alloy including aluminum, copper, zinc, or brass and but can also be made of injection molded plastic or nylon, or with other methods and materials known in the art. 
         [0048]      FIGS. 13 and 14  show the coupling mechanism assembled with a pivoting paper holder  800 . In addition to the previously described parts,  FIG. 13  also shows mounting screws  140 , flat head screws  146 , shoulder bolt  150 , dowels  156 , and rod  700 . Rod  700  may be solid or hollow. Rod  700  includes notch  702 . Notch  702  is located in one end of rod  700  sufficient in size to receive catch  506  of insert  500 .  FIGS. 13 and 14  additionally show wall bracket  101 , base bracket  201 , body  301 , bushing  601 , and cap  401 . Wall bracket  101 , base bracket  201 , body  301 , bushing  601 , and cap  401  are identical in size, shape and material to their respective counterparts wall bracket  100 , base bracket  200 , body  300 , bushing  600 , and cap  400 . 
         [0049]    In use, mounting screws  140  securely attach both wall brackets  100  and  101  to the wall or mounting surface. The voids surrounding mounting holes  116  and  118  created by semicircular indentions  124  and  126  allow the material of the wall brackets to deform toward the wall slightly during the tightening of mounting screws  140 , thus preventing warping of the perimeter of the wall mount during installation and encouraging a flush mount. For the non-rotating side of paper holder (“A”), bushing  600  is inserted into bushing hole  302  of body  300  and dowels  156  are inserted in dowel holes  606  and  608  of bushing  600 . Cap  400  is placed on bushing  600  and dowels  156  are inserted into two diametrically opposed dowel holes. Depending on the desired final orientation of body  300 , where cam slot  308  is inconspicuous, either dowel holes  406  and  408  or dowel holes  407  and  409  are used. Insert  500  is placed inside catch hole  416  of cap  400  and bolt hole  504  is aligned with bolt hole  412 . Shoulder bolt  150  is inserted through open end  317  of body  300 , through bolt hole  610 , through bolt hole  412 , and finally into the threaded bolt hole  504 . Shoulder  151  on shoulder bolt  150  abuts cap  400  and thereby fixes the distance between cap  400  and body  300 . The dowels prevent cap  400  from rotating with respect to body  300 . As can be seen from  FIG. 14 , dowels  156  are in contact with cap  400 , bushing  600 , and body  300 . 
         [0050]    Base bracket  200  is secured to body  300  with flat head screws  146  inserted through base holes  204 ,  205 ,  206 , and  207  and into stanchions  312 ,  313 ,  314 , and  315  of body  300 . The base bracket, complete with attached body  300  and cap  400 , is placed over wall bracket  100  and base flanges  224 ,  225 , and  226  of base bracket  200  are oriented to pass between flanges  110 ,  111 ,  112 , and  113  of wall bracket  100  until base housing  220  abuts spacers  120  and  122 . Base bracket  200  is rotated until the three base flanges of base bracket  200  are positioned under and adjacent to three of the flanges of wall bracket  100 . The width of the flanges and the width of the base flanges overlap sufficiently to allow up to about 15° of axial rotational adjustment between wall bracket  100  and base bracket  200  without compromising the integrity of the connection. The width of the flanges ensures the contact surfaces between the flanges remains adequate to securely hold wall bracket  100  to base bracket  200 . The rotational adjustment allows the fixture to be properly aligned without requiring the wall bracket to be removed and remounted at a different orientation. The rotational freedom is a great advantage over the prior art which all requires exact placement of the mounting holes for correct placement of the final assembly. 
         [0051]    Once the base bracket, complete with attached body  300  and cap  400 , are oriented to the desired position, cam pin  148  is inserted into cam slot  308 . Cam channel  216  and cam support  320  guides cam pin  148  through cam hole  218  until cam pin  148  abuts wall bracket  100 . Flat surfaces  164  of cam pin  148  simultaneously engage the fourth flange of wall bracket  100  and lip  104 . Cam pin  148  is rotated about ¼ of a turn in either direction. Teeth  166  of cam surface  162  simultaneously engage the fourth flange of wall bracket  100  and lip  104  securing wall bracket  100  to base bracket  200 . If necessary, cam pin  148  can be released and the orientation of the base bracket can be adjusted. The engagement of the teeth with the wall bracket and lip prevent movement of the base bracket with respect to the wall bracket. In an alternate embodiment, cam pin  149  is rotated about ¼ of a turn to engage the off-center cam surface  163  with the fourth flange of wall bracket  100  and lip  104 . Friction is created which secures the base bracket to the wall bracket. 
         [0052]    For the rotating side of the paper holder “B”, bushing  601  is inserted into the bushing hole of body  301  and dowels  156  are purposely omitted in order to allow rotation of the cap with respect to the body. Cap  401  is placed adjacent to bushing  601  and is concentrically aligned with both bushing  601  and body  301 . Rod  700  is positioned inside the catch hole of cap  401 . A shoulder bolt  150  is inserted through body  301 , through bushing  601 , through cap  401  and finally into a threaded bolt hole in rod  700 . Shoulder  151  on shoulder bolt  150  abuts cap  401  and prevents over tightening of shoulder bolt  150  while still allowing rotation of cap  401  with respect to body  301 . 
         [0053]    Base bracket  201 , complete with attached body  301  and cap  401  with rod  700 , is placed over wall bracket  101 . Base bracket  201  is rotated until the three base flanges of base bracket  201  become adjacent to three of the flanges of wall bracket  101 . Once the base bracket is rotated to the desired position, a cam pin is inserted into the cam slot on body  301 . The cam pin is rotated about ¼ of a turn in either direction to secure wall bracket  101  to base bracket  201 . 
         [0054]    An alternate embodiment of the rotary coupling mechanism is shown in  FIGS. 15-19 .  FIGS. 15 and 16  show wall bracket  1500 . Wall bracket  1500  is generally a disk shape comprised of base  1502  and a centrally located protruding cone shape, boss  1504 . Two diametrically opposed mounting holes  1518  and  1520  pass through base  1502  and have a beveled edge for countersinking flat head screws. Stop rib  1512  is a single protrusion located proximate the perimeter of base  1502 . Diametrically opposed to stop rib  1512  is pin slot  1514  and pin stop  1516 . Pin slot  1514  is a rectangular channel in wall bracket  1500 . Pin slot  1514  includes incline  1515 . Incline  1515  in an angled surface rising from the depth of pin slot  1514  to the surface of base  1502 . Pin stop  1516  is an angled indention proximate one end of pin slot  1514  in the perimeter of wall bracket  1500 . Flanges  1506 ,  1507 ,  1508 , and  1509  extend from base  1502  creating slots  1530  in base  1502  under each flange. Slots  1530  pass completely through base  1502 . Flanges  1506 ,  1507 ,  1508 , and  1509  each have an angled mating surface  1522 . In the preferred embodiment, the angle of mating surfaces  1522  can range from 1° to 5°. 
         [0055]    Referring to  FIGS. 17 through 21 , base bracket  1700  and locking pin  1724  are shown. Base bracket  1700  is generally cylindrical in shape and is enclosed on one end by base housing  1710 . Hole  1708  is concentric with and passes through base housing  1710 . Lip  1702  extends outwardly from the open end of base bracket  1700 . Included on lip  1702  are base holes  1704 ,  1705 ,  1706 , and  1707 . Base holes  1704 ,  1705 ,  1706 , and  1707  are circular in shape and each includes a beveled perimeter on the underside of lip  1702 . Spring  1728  is comprised of two arches connected by a flat rib. Spring  1728  extends from lip  1702  and is integrally formed with base bracket  1700 . Pin channel  1736  is a radial groove in lip  1702  perpendicular to the perimeter of base housing  1710  and intersects pin hole  1734 . Locking pin  1724  ( FIG. 21 ) resides in pin channel  1736  and has integrally formed thereon a rectangular extension pin tab  1726 . The cylindrical body of locking pin  1724  passes under first arch  1725  of spring  1728  through pin hole  1734  and into the interior of base bracket  1700 . Pin tab  1726  is constrained by the flat rib of spring  1728 . Pin tab  1726  includes notch  1738 . Locking pin  1724  includes receptacle  1730  on one end. Receptacle  1730  is shaped to receive a torque transferring tool. Receptacle  1730  can be shaped to receive any number of tools capable of exerting a torsional force on locking pin  1724 . In the preferred embodiment, a bladed screwdriver is used. Opposite receptacle  1730  on locking pin  1724  is pin face  1732 . Pin face  1732  is a flat surface. Angle  1733  which is the angle of pin face  1732  relative to pin tab  1726  can range from about 20° to 40°. In the preferred embodiment, angle  1733  is about 30°. Base flanges  1716 ,  1717 ,  1718 , and  1719  are L-shaped tabs that extend inwardly towards the interior of base bracket  1700  from base housing  1710 . Slots  1742  in base housing  1710  are in alignment with each base flange. Slots  1742  are openings that pass completely through base housing  1710 . Base flanges  1716 ,  1717 ,  1718 , and  1719  each include an angled mating surface  1740 . In the preferred embodiment, the angle of mating surfaces  1740  can range from 1° to 5°. Rib  1722  is connected to base flange  1717 . 
         [0056]    In use, wall bracket  1500  is secured to the wall with appropriate screws on molly bolts through mounting holes  1518  and  1520 . Base bracket  1700  with locking pin  1724  residing in pin channel  1736  is secured to body  300  with screws inserted through base holes  1704 ,  1705 ,  1706 , and  1707  and into stanchions  312 ,  313 ,  314 , and  315  of body  300 . Locking pin  1724  extends through cam slot  308  of body  300 . To attach the base bracket to the wall bracket, base bracket  1700  with attached body  300  and cap  400  is placed over wall bracket  1500  and base flanges  1716 ,  1717 ,  1718 , and  1719  of base bracket  1700  are oriented to pass between flanges  1506 ,  1507 ,  1508 , and  1509  of wall bracket  1500 . Simultaneously, pin face  1732  of locking pin  1724  is received in pin slot  1514 . Base bracket  1700  is rotated until the base flanges of base bracket  1700  become under and adjacent to flanges  1506 ,  1507 ,  1508 , and  1509  of wall bracket  1500 . The angled surfaces  1522  of the flanges of wall bracket  1500  cooperate with the angled surfaces  1740  of the base flanges of base bracket  1700  and cause the base bracket to be secured with wall bracket  1500  into a locked position. Stop rib  1512  abuts rib  1722  and prevents over rotation of base bracket  1700  with respect to wall bracket  1500 . 
         [0057]      FIGS. 22A-22C  show the position of locking pin  1724  as base bracket  1700  is rotated with respect to wall bracket  1500 . The cylindrical body of locking pin  1724  remains under first arch  1725  during the rotational attachment of base bracket  1700  to wall bracket  1500 . During the rotational attachment of the base bracket to the wall bracket, locking pin  1724  axially rotates as pin face meets incline  1515  and ultimately becomes adjacent to the angled surface of pin stop  1516 . 
         [0058]    As shown in  FIG. 22A , pin tab  1726  is adjacent to and currently parallel with the flat rib of spring  1728  as rotation of the base bracket with respect to the wall bracket begins. Locking pin  1724  moves through pin slot  1514  until pin face  1732  becomes adjacent to incline  1515 . 
         [0059]    As can be seen in  FIG. 22B , locking pin  1724  rotates as pin face  1732  slides up and over incline  1515 . Pin tab  1726  deforms spring  1728  as locking pin  1724  rotates. In the preferred embodiment, a screwdriver is used to assist the rotation of locking pin  1724  against the bias of spring  1728 . 
         [0060]      FIG. 22C  shows the base bracket and locking pin  1724  in a locked position relative to the wall bracket. In the locked position, pin face  1732  is adjacent and parallel with the angled surface of pin stop  1516  and pin tab  1726  is once again adjacent to and parallel with the flat rib of spring  1728 . 
         [0061]    To remove base bracket  1700  out of the locked position a torque transferring tool inserted into receptacle  1730  is used to rotate locking pin  1724  against the bias of spring  1728  and move pin face  1732  out of pin stop  1516  and back into pin slot  1514 . When locking pin  1724  is in pin slot  1514 , base  1700  is free to rotate off of wall bracket  1500 . 
         [0062]    It will be appreciated by those skilled in the art that changes could be made to the embodiments described above without departing from the broad inventive concept thereof. It is understood, therefore, that this invention is not limited to the particular embodiments disclosed, but it is intended to cover modifications within the spirit and scope of the present invention as defined by the appended claims.