Abstract:
The rectangular tubular frame of the garment rack is mounted on two heavy-duty rectangular tubular support bases, carrying casters at either end of each, by a clamp-adaptor surrounding the central portion of each support base and providing an upwardly-projecting cylindrical boss on each for positioning the garment rack tubular frame thereon. Each vertical support post of the tubular frame has an inwardly-facing horizontally disposed adaptor attached reinforcedly thereto, the outer end of each adaptor being concavely shaped to follow the contour of the post on which it is perpendicularly mounted, and the two adaptors serve to support the horizontal garment hanger support rod of the rack frame.

Description:
FIELD OF THE INVENTION 
     This invention is directed to the provision of knock-down garment racks, most especially of sturdy, stable and durable racks for industrial use. 
     BACKGROUND OF THE INVENTION 
     The garment racks in current general industrial use are largely assemblies of steel pipes connected by typical plumbing joints or by welding. For the most part, these racks have little or no reinforcement and, when given the extraordinary hard wear and abuse of being pushed or pulled along bumpy streets, up and down curbs, etc., their useful life is shortened considerably. As for collapsible racks, those few that are found in use or in the prior art, having pivotally-mounted supports or knuckle joints for their collapsibility, lack the durability to be suitable for sustained hard usage. 
     It is therefore a primary object of this invention to provide a knock-down garment rack of outstanding strength, durability and high resistance to excessive wear. It is also an object of this invention to provide a garment rack which can be disassembled for space-saving storage and shipping, and reassembled quickly with a minimum of time, effort or tools. 
     A search of the prior art has uncovered the following patents which may have some pertinence to the present invention: 
     U.S. Pat. No. 1,008,477, issued to Kohn on Nov. 11, 1911; 
     U.S. Pat. No. 2,748,955, issued to Anselmo on Jun. 5, 1956; 
     U.S. Pat. No. 2,798,618, issued to Singer on Jul. 9, 1957; 
     U.S. Pat. No. 2,893,568, issued to Scholz on Jul. 7, 1959; 
     U.S. Pat. No. 3,146,892, issued to White on Sep. 1, 1964; 
     U.S. Pat. No. 3,705,731, issued to Berchak on Dec. 12, 1997; 
     British Patent No. 289,366, issued on Jan. 26, 1928; 
     British Patent No. 389,890, issued on Jun. 9, 1932. 
     Kohn teaches a folding rack that has vertical standards that fit within a coaxial support; Scholz teaches a knockdown rack that has square tubing as the bases onto which the vertical supports each are held by a base locking member; White teaches a knockdown wheeled support rack with square tubing to support the vertical legs and wheels; British patents teach the concept of expanding bushings to hold the joints secure in tubular racks; and Anselmo, Singer and Berchak are representative of the state of the art. 
     SUMMARY OF THE INVENTION 
     The present invention, while similar in general outline to conventional garment racks, provides novel strength- and durability-enhancing elements well beyond the disclosures of the prior art cited above. Two horizontal support base members, rectangular in cross-section, formed from heavy-duty steel and each having a caster depending from either end thereof, serve to carry and anchor the rack&#39;s rectangular frame by means of a centrally positioned strong two-jawed inter-locking clamp-adaptor mounted on and through each base member. Each clamp-adaptor&#39;s upper jaw has an upwardly projecting cylindrical boss onto which the vertical portions of an H-shaped tubular transverse rack-bracing element are fittingly fixed. The lower ends of the rectangular rack frame&#39;s vertical tubular posts are inserted coaxially and secured in the upwardly-facing portions of the H-shaped brace. 
     At the upper ends of the vertical tubular rack posts, the horizontal garment hanger upper support rod is mounted at each end on an adaptor, the outer end of which is concavely shaped to engage and to be fastened to the circumferential surface of an upward extension of each vertical post for rigid, strong joints. 
    
    
     All the features of this invention and its preferred embodiments will be described in full detail in connection with the following illustrative, but not limiting, drawings, wherein: 
     SHORT FIGURE DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a left front perspective view of a garment rack made in accordance with this invention; 
     FIG. 2 is an exploded plan view of the disassembled parts of the garment rack of FIG. 1; 
     FIG. 3 is a sectional view taken along line 3--3 of FIG. 1; 
     FIG. 4 is an exploded left front perspective view of the base support member (partially shown) and the clamp-adaptor jaw members to be assembled therewith; 
     FIG. 5 is an enlarged sectional view taken along line 5--5 of FIG. 1, of the assembled clamp-adaptor elements shown in FIG. 4; 
     FIG. 6 is an exploded front elevational view of the connecting elements used to form the rigid joint between the left vertical post and the horizontal hanger support bar of the garment rack; and 
     FIG. 7 is an enlarged sectional view, taken along line 7--7 of FIG. 1, of the assembled connector elements shown in FIG. 6. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The knock-down garment rack shown in FIG. 1, generally designated 10, is mounted on a pair of sturdy tubular support bases 12, rectangular with rounded edges in cross-section. Each support base 12 carries a caster 14 adjacent either end thereof; as seen in FIG. 3, spindle 16 of each caster 14 is secured vertically through base 12 by nut 17, with strong steel bushing 18 positioned around each spindle 16 within base 12, to resist damage to, or collapse of, casters 14 or bases 12 from rough usage. Also seen in FIG. 3 is resilient plastic end plug 20, one of which is provided for each base 12 end, serving to seal the interiors of beams 12 from dirt and dust, at the same time acting as a bumper to cushion the effect of a collision therewith. 
     Each support base 12 is centrally bored through its top and bottom horizontal portions 22 and 24, respectively, forming openings 26 and 28 to accept fittingly portions of clamp-adaptor assembly 30 mounted therein. Specifically, as best seen in FIGS. 4 and 5, each heavy-gauge clamp-adaptor 30 has an upper jaw member 32 shaped like an inverted U, with center portion 34 and each of its depending sides 36 extending downwardly as a tapered tongue 38, while lower jaw member 40 is shaped like an upright U whose upwardly projecting sides 42 each has a centrally located tapered groove 44 exactly complementary to and interfitting with the corresponding tongue 38. Each upper jaw member 32 has a cylindrical element 45 welded thereto and comprising boss 46 centrally bored at 48 and extending upwardly from jaw 32&#39;s horizontal top surface 50; boss 46 has enlarged hexagonally-shaped opening 52 located directly below its top surface 54 to accommodate non-rotatably loosely confined threaded nut 56 placed and staked therein during original assembly. 
     As shown, each cylindrical element 45 on upper jaw 32 also has a downwardly projecting centrally bored boss 58 which is concentric with boss 46, extends fittingly through opening 26 in beam 12 and has at its lower end enlarged bore 60 to accommodate O-ring 62 (FIG. 5). From the opposite direction, each lower jaw member 40 has a centrally disposed upwardly projecting boss 64 with its upper bore 66 equal to, aligned and concentric with bore 48, and its lower bore 68 sized to accept the head of Allen bolt 70, boss 64 extending through opening 28 of beam 12 to a position directly under boss 58. Boss 64 has an undercut groove 72 directly above the inner surface of lower jaw member 40 (FIG. 4), where lock washer 74 (shown detached for clarity) may be placed during assembly so that each beam 12, lower jaw 40 and Allen bolt 70 may remain connected when garment rack 10 is disassembled. 
     In assembling each clamp-adaptor 30 with its corresponding support beam 12, lower jaw 40 is placed appropriately on beam 12 with boss 64 projecting through opening 28; lock washer 74 is positioned and snapped into place on undercut groove 72 by manipulation through upper beam opening 26. Upper jaw member 32 is put into place and Allen bolt 70 is inserted from the bottom of the assembly; as bolt 70 is turned, it engages the threads of captive nut 56 and its outer surface presses O-ring 62; as bolt 70 reaches its ultimate tightness, upper and lower jaws 32 and 40 substantially meet in interlocking engagement, while bosses 58 and 64 are kept from actual contact only by the protruding portion of resilient O-ring 62. As a result, the two clamp-adaptors 30 are mounted with unusual strength and firmness on their respective support bases 12, and their upwardly projecting bosses 46 provide a foundation of great stability for the rectangular frame of garment rack 10 mounted thereon. 
     H-shaped tubular support 76 has its cross-bracing horizontal portion 78 terminating at each end with welded vertical tubes 80. the lower ends of which fit concentrically over, are supported by, and are welded to, corresponding projecting bosses 46 of clamp-adaptors 30. The lower ends of vertical rack support posts 82 are held releasably within tubes 80 of H-shaped support 76 by conventional spring-pressed detents 84 which engage matching openings 86 in tubes 80, seen in FIG. 2. 
     It should be noted that while the drawings and description above show each clamp-adaptor assembly 30 has upper jaw member 32, cylindrical element 45 with bosses 46 and 58, and vertical tubes 80 as individual components welded together, it is contemplated that in the future they may be cast into a single unitary piece; in exactly analogous manner, lower jaw member 40 and boss 64 may also be cast as one piece. 
     At the upper end of each vertical rack post 82, an inner concentric sleeve 88 is releasably held therein by detent 90 protruding through opening 92 in post 82 (FIG. 2). Sleeve 88 extends upwardly and is connected with vertical rack post extension 94 by screw 96 passing transversely through both and securing adaptor 98 fittingly to the outer contour of post extension 94 (FIGS. 6 and 7). Sealing caps 100 may be provided at the tops of post extensions 94. As best seen in FIG. 7, each adaptor 98 consists of outer piece 102, concavely shaped at its outer end 104 to match the contour of post extension 94, and adaptor extension 106 having cylindrical projection 108 which fits rotatably in bore 110 of piece 102. When screw 96 has been tightened in the assembly of rack 10, a strong rigid joint is created. Each end of horizontal tubular garment hanger support rod 112 has been slid onto the corresponding inwardly facing end of adaptor extension 106 and is secured in place by the insertion of split spring pin 114 into aligned openings 116 in extension 106 and corresponding openings 118 in hanger support rod 112 to complete the assembly of rack 10. 
     Also shown in FIG. 7 is heavy metal bushing 120 around screw 96, the ends of bushing 120 being curved to conform to the interior surface of sleeve 88, to enhance the strength and resistance of the joint and its components to damage, bending or collapse. Bushing 120 in FIG. 7 and bushing 18 of FIG. 3 are typical of reinforcing elements incorporated wherever possible throughout rack 10&#39;s structure. 
     The disassembly of rack 10 for transport or storage can be actually accomplished with just an Allen wrench by: manually disengaging detents 84 and 90, thus releasing vertical rack posts 82 and upper assembly 111 of garment hanger support rod 112, adaptor 98, post extension 94 and sleeve 88 (as shown in FIG. 2); after loosening bolts 70, H-shaped support 76, together with upper laws 32 welded thereto, may be lifted off, leaving support beams 12, casters 14, lower jaw 40 held in place by lock washer 74 and Allen bolt 70 assembled, bolt 70 being held by O-ring 62. Only a few minutes are required to accomplish this; if it is desired to disassemble the upper and lower assemblies further, a screwdriver is required for the former, the Allen wrench for the latter. It may be noted also that because of rack 10&#39;s easy disassembly, rarely required replacement of a damaged or broken part is a simple matter. 
     The sturdiness and strength of garment racks constructed in accordance with the concepts and principles of this invention are outstanding. Testing has established that these racks are capable of successfully supporting loads of more than two hundred pounds without difficulty or damage. Another feature to be mentioned is that the garment racks of this invention may be provided with conventional and known shallow wire baskets extending across the width of the racks to carry non-hanging items, for installation above either H-shaped support 76 or garment hanger support rod 112. 
     A complete disclosure of the details and essence of this invention has been made, and the best modes of practicing it as now contemplated have been presented. It will be apparent to all skilled in the art that modifications, substitutions and additions may be made in the elements of the invention without departing from its concepts, the scope of which is defined and limited only by the ensuing claims, wherein: