Abstract:
A rack for Allen wrenches with grooves for accepting the wrenches which slant first upwardly and then after a 90° turn downwardly and with surfaces intersecting to provide a line bottom to each groove.

Description:
FIELD OF THE INVENTION 
     This invention relates to a rack for holding Allen wrenches of differing sizes. 
     BACKGROUND OF THE INVENTION 
     Allen wrenches come in sets of differing sizes of wrench, and it has been difficult to organize these in a way that makes the desired size easily and quickly accessible and easily and quickly re-rackable. 
     SUMMARY OF THE INVENTION 
     I have discovered that the above difficulties are overcome in a simple, practical, and inexpensive way if there is provided a rack carrying a plurality of grooves, each groove being defined in longitudinal cross-section by a pair of groove portions intersecting at an angle of 90°, and in transverse cross section by a pair of arcs on transversely spaced centers, intersecting to define a line along the bottom of each groove portion. 
     In a preferred embodiment, the rack is of molded plastic, in one piece of about the same thickness throughout. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The preferred embodiment, shown in the drawings, has the structure and mode of operation now described. 
     Drawings 
     FIG. 1 is a isometric view of the preferred embodiment. 
     FIG. 2 is an end elevation view thereof. 
     FIG. 3 is a partial sectional view, taken at 3--3 of FIG. 2, through one of the grooves. 
     FIG. 4. is a partial sectional view, taken at 4--4 of FIG. 2. 
     FIG. 5 is a partial sectional view, taken at 5--5 of FIG. 2. 
    
    
     Structure 
     There is shown in FIG. 1 an Allen wrench rack indicated generally at 10, formed by molding plastic (injection molded polypropylene), with a front support portion 12, a rear support portion 14, a front rack portion 16, and a rear rack portion 18. Side panels 16a and 18a of portions 16 and 18 taper upwardly inwardly. The thickness of the walls forming the various parts of the rack are the same throughout the rack, as near as may be. 
     Extending along rack portions 16 and 18 are a multiplicity of grooves 20a through 20j. The depth of the grooves is progressively larger from left to right in FIG. 1 (i.e., from 20a to 20j). Each groove is of the same cross-sectional size and shape along its portion 16 length and its portion 18 length, the two lengths of each groove intersecting to provide a corresponding corrugation at the top of the rack, as shown. 
     Each groove is defined by the line intersection of a pair of arcs, in cross-section, as shown in FIG. 3, which shows the rightmost groove. In it, arc 22 about center 24 intersects arc 26 about center 28 to define line 30, which extends up portion 16 and down portion 18. 
     Operation 
     Each groove is well adapted to seat, in a firm and stable way, one of a set of Allen wrenches, smallest at the left in FIG. 1, and larger ranging toward the right. Two such wrenches 32 and 34 of a set are shown in FIG. 1. Owing to the double arc line configuration of the grooves, they accept easily and stably even Allen wrenches in which the shank 38, unlike that shown in FIG. 1, is longer, in its direction parallel with its handle, than it is perpendicular thereto (i.e., transversely of its groove). 
     The overall shape of the rack makes also for rack stability on a working surface, and for ease and economy of injection molding. 
     Other embodiments within the following claims will occur to one skilled in the art.