in the following detailed description numerous specific details are set forth in order to provide a thorough understanding of the invention . however , it will be understood by those skilled in the art that the present invention may be practiced without these specific details . for example , the invention is not limited in scope to the particular type of industry application depicted in the figures . in other instances , well - known methods , procedures , and components have not been described in detail so as not to obscure the present invention . fig1 - 6 illustrate a multi - orientation , stacking riser 10 according to an exemplary embodiment of the present invention . in pertinent part , the riser 10 includes a main section 12 , a protruding mating section 14 , and a recessed mating section 16 . in the preferred embodiment , the foregoing sections are integrally formed with one another , for example by injection molding same . the main section 12 provides the primary supporting body for the riser 10 . the protruding 14 and recessed 16 mating sections cooperate with the recessed and protruding , respectively , mating sections of one or more other risers to securely mount one riser on top of another in one of a multiple of respective orientations of the risers . the protruding mating section 14 extends from a top surface 18 of the main section 12 . in the illustrated embodiment of fig1 - 6 , the protruding mating section 14 is provided with square outer dimensions . the outer dimensions of the protruding mating section 14 are sized in a manner to cooperate with the recessed mating section 16 as discussed below . the recessed mating section 16 is advantageously formed in a bottom surface 20 of the main section 12 opposite to the top surface 18 . the references to top and bottom surfaces herein are used solely for the purposes of illustration and to describe the general basic positional relationship between the protruding 14 and recessed 16 mating surfaces . the positioning of the protruding 14 and recessed 16 mating sections is not limited to the top and bottom surfaces of the main section 12 depending upon the manner of application of the riser 10 . the recessed mating section 16 is formed by a depression in the bottom surface 20 of the main section 12 , and , thus , the recessed mating section 16 extends into the interior of the main section 12 . in the case of the illustrated embodiment , the interior of the main section 12 includes a series of ribs that extend from outer walls 24 of the main section 12 toward the middle of the interior of the main section 12 . the ribs lend structural support to the main section 12 of the riser 10 while minimizing the weight of the riser 10 and the amount of material required to form the riser 10 . the recessed mating section 16 is formed by a geometric rib 26 that is formed in a shape that is complementary to the outer dimensions of the protruding mating section 14 . in the illustrated , preferred embodiment , the geometric rib 26 is provided in the form of an eight - pointed “ star ” that is centered with the interior of the main section 12 . the geometric rib 26 is connected with interior top surface 18 of the main section 12 . it is further connected with one or more of the side walls of the main section 12 either directly or by means of first support ribs 28 . the geometric rib 26 may also be supported by a series of second support ribs 30 that extend within the geometric rib 26 from one side to the other . both the geometric rib 26 and the first support ribs 28 extend to the bottom surface 20 of the main section 12 . in contrast , the second support ribs 30 located within the geometric rib 26 do not extend entirely to the bottom surface 20 . those of skill in the art will recognize that the bottom surface 20 in this context is not a solid surface but rather the plane formed by the bottom edges of the outer walls 24 of the main section 12 . the difference in height between the geometric rib 26 and the second support ribs 30 creates a recess so that the second support ribs 30 do not interfere with the positioning of the protruding mating section 12 within the recessed mating section 16 defined by the geometric rib 26 and , furthermore , help define a depth of the recessed mating section 16 to help control how far the protruding mating section 12 extends into the recessed mating section 16 . in a preferred embodiment , the difference in height between the geometric rib 26 and the second support ribs 30 is approximately equal to a height of the protruding mating section 14 . in this manner , two stacked risers 10 will contact one another both at a junction of the bottom of the outer walls 24 with the top surface 18 and a junction of the top of the protruding mating section 14 with the bottom of the second support ribs 30 , resulting in increased stability and strength of the stacked risers . the relationship between the protruding mating section 14 and recessed mating section 16 will now be described in more detail . it will be seen that the outer dimension d of the protruding mating section 14 corresponds , with a tolerance for clearance and for manufacturing variances , to the inner dimension d of the recessed mating section 16 to allow insertion of the protruding mating section 14 into the recessed mating section 16 . as illustrated in fig3 and 4 , the dimensions d and d of the protruding mating section 14 and recessed mating section 16 , respectively , are consistent around both of these sections . therefore , the protruding mating section 14 and recessed mating section 16 may be rotated relative to one another while still allowing insertion of the protruding mating section 14 into the recessed mating section 16 . more particularly , the shape of the recessed mating section 16 allows for discrete forty - five degree ) ( 45 °) rotations — and subsequent insertions — of the protruding mating section 14 of one riser relative to the recessed mating section 16 of another riser . one advantage in the ability to readily vary the orientation of one riser relative to another can be seen in fig6 . in the illustrated embodiment , each individual riser is molded in the form of a hard back book ; other shapes also being suitable for the risers . by varying the relative positioning of one riser to another , differing appearances of stacked books supporting a bed or other piece of furniture can be created . in a preferred embodiment , the riser 10 is injection molded from a suitable plastic material . while the illustrated embodiment of the riser 10 is provided with a series of ribs for internal support of the main section 12 and forming of the recessed mating section 16 , it is also contemplated within the scope of the invention for the main section 12 to be formed from a solid block of material with the recessed mating section 16 being a depression in the otherwise solid block . while the preferred embodiment has been illustrated with a protruding mating section 14 and recessed mating section 16 in the described shapes , other embodiments may utilize other complementary shapes . for example , the protruding mating section 14 and recessed mating section 16 may each be provided in the shape of a circle , which would allow a greater range of relative angular adjustment of the stacked risers . the preferred embodiments of the invention have been described above to explain the principles of the invention and its practical application to thereby enable others skilled in the art to utilize the invention in the best mode known to the inventors . however , as various modifications could be made in the constructions and methods herein described and illustrated without departing from the scope of the invention , it is intended that all matter contained in the foregoing description or shown in the accompanying drawings shall be interpreted as illustrative rather than limiting . thus , the breadth and scope of the present invention should not be limited by the above - described exemplary embodiment , but should be defined only in accordance with the following claims appended hereto and their equivalents .
a multi - orientation stacking riser includes a main section ; a protruding mating section extending from one surface of the main section ; and a recessed mating section formed in an opposite surface of the main section , and wherein the recessed mating section accommodates insertion of a protruding mating section of an identical stacking riser in at least first and second positions .