Patent Document

BACKGROUND OF INVENTION 
   1. Field of the Invention 
   This invention relates, generally, to steps. More particularly, it relates to a step having a stored position under a kitchen counter and a deployed configuration where it extends from said kitchen counter. 
   2. Description of the Prior Art 
   Only tall people can easily access cupboards positioned above kitchen countertops. The top shelves in such cupboards are reachable only by the very tall. Thus, almost everyone has difficulty in reaching the back part of the uppermost shelf in a kitchen cupboard. 
   Several patents have been awarded for steps that are stored under a kitchen counter when not in use and which are easily deployed out from under the counter when needed. For example, U.S. Pat. No. 6,439,342 to Boykin discloses a retractable step having an additional step stored therein. 
   There remains a need for further development in this field, however, because some of the earlier designs are mechanically complex and thus expensive to manufacture, some of the earlier designs are difficult to deploy, and some of them are difficult to reconfigure for storage purposes. 
   However, in view of the prior art considered as a whole at the time the present invention was made, it was not obvious to those of ordinary skill in the pertinent art how the limitations of the earlier devices could be overcome. 
   SUMMARY OF INVENTION 
   The long-standing but heretofore unfulfilled need for a step that is stored out of the way when not in use and which easily deploys when needed is now met by a new, useful, and nonobvious invention. The novel step assembly occupies a relatively small space when in a storage configuration but provides a full-size step when in a fully deployed configuration. 
   The novel structure includes a back wall adapted to be mounted in a vertical plane to a support surface. A first back rod and a second back rod are pivotally secured at their respective rearward ends to the back wall at laterally spaced apart opposite ends thereof for movement in a horizontal plane. 
   A front is wall disposed in a vertical plane. A first front rod and a second front rod are pivotally secured at their respective forward ends to the front wall at laterally spaced apart opposite ends thereof for movement in a horizontal plane. 
   The first back rod and the first front rod are pivotally connected to one another at their respective forward and rearward ends for pivotal movement in a horizontal plane and in a vertical plane. Moreover, the second back rod and the second front rod are pivotally connected to one another at their respective forward and rearward ends for pivotal movement in a horizontal plane and in a vertical plane. 
   The back wall and said front wall are disposed in closely spaced relation to one another when the step assembly is in the stored configuration. The first back rod and the first front rod are disposed in parallel, abutting relation to one another and in parallel relation to the back and front walls when the step assembly is in the stored configuration. The second back rod and the second front rod are also disposed in parallel, abutting relation to one another and in parallel relation to the back and front walls when the step assembly is in the stored configuration. 
   The first back rod and the first forward rod are disposed in perpendicular relation to the back and front walls when the step assembly is in a fully extended configuration. The second back rod and the second front rod are also disposed in perpendicular relation to the back and front walls when the step assembly is in the fully extended configuration. 
   The first back rod and the first front rod are disposed in parallel relation to the second back rod and the second front rod when the step assembly is in the fully extended position. The first front rod and the second front rod are disposed in perpendicular relation to the first back rod and the second back rod when the novel step is in its fully deployed configuration, i.e., when the front wall is disposed in a horizontal plane to provide a step. 
   A first rear clevis is fixedly secured to a first end of the back wall and a second rear clevis is fixedly secured to a second end of the back wall. The first back rod has a rearward end pivotally mounted to the first rear clevis for movement in a horizontal plane and the second back rod has a rearward end pivotally mounted to the second rear clevis for movement in a horizontal plane. 
   A first forward clevis is fixedly secured to a first end of the front wall and a second forward clevis is fixedly secured to a second end of the front wall. The first front rod has a forward end pivotally mounted to the first forward clevis for movement in a horizontal plane and the second front rod has a forward end pivotally mounted to the second forward clevis for movement in a horizontal plane. 
   A first horizontal pivot block is secured to the forward end of the first back rod. A second horizontal pivot block is secured to the forward end of the second back rod. A first vertical pivot block is secured to the rearward end of the first front rod, and a second vertical pivot block is secured to the rearward end of the second front rod. The first horizontal pivot block and the first vertical pivot block are pivotally connected to one another so that the first vertical pivot block may rotate in a vertical plane relative to the first horizontal pivot block and the second horizontal pivot block and the second vertical pivot block are pivotally connected to one another so that the second vertical pivot block may rotate in a vertical plane relative to the second horizontal pivot block. 
   The first horizontal pivot block is disposed in abutting, lateral relation to the first vertical pivot block and the second horizontal pivot block as disposed in abutting, lateral relation to the second vertical pivot block. 
   An important object of this invention is to provide a step having utility primarily in a kitchen environment for helping a user reach elevated shelves in a cupboard. 
   Another important object is to provide a step that has a fully retracted position where it occupies space not normally used under a kitchen counter. 
   Yet another object is to provide a step that deploys quickly when needed. 
   Still another object is to provide a step that is easily and quickly returned to its stored position after use. 
   These and other important objects, advantages, and features of the invention will become clear as this description proceeds. 
   The invention accordingly comprises the features of construction, combination of elements, and arrangement of parts that will be exemplified in the description set forth hereinafter and the scope of the invention will be indicated in the claims. 

   
     BRIEF DESCRIPTION OF DRAWINGS 
     For a fuller understanding of the nature and objects of the invention, reference should be made to the following detailed description, taken in connection with the accompanying drawings, in which: 
       FIG. 1  is a perspective view of a typical kitchen counter having overhead cupboards and depicting the novel step when in its stored configuration; 
       FIG. 2  is a perspective view depicting the same environment as  FIG. 1 , but depicting the novel step in its fully extended configuration; 
       FIG. 3  is a view like  FIG. 2  but depicting the novel step in its fully deployed configuration; 
       FIG. 4  is a side elevational view depicting the novel step in its fully deployed configuration; 
       FIG. 5  is a perspective view of the novel step in its fully extended configuration; 
       FIG. 6  is a perspective view of the novel step in its fully deployed configuration; 
       FIG. 7  is a top plan view of the novel step in its stored configuration; 
       FIG. 8  is a top plan view of the novel step in a partially extended configuration; and 
       FIG. 9  is a top plan view of the novel step in its fully extended configuration. 
   

   DETAILED DESCRIPTION 
   Referring to  FIG. 1 , it will there be seen that the reference numeral  10  denotes an illustrative environment of the present invention as a whole. Environment  10  includes a kitchen counter  12  having countertop  14  and doors  16  that provide access to space inside side said kitchen counter  12 . Cupboards  18  are mounted above kitchen counter  12  and include doors  20  providing access to shelving, not shown, therewithin. The undepicted shelves within said cupboards  18  are hard to reach by people of average height and the uppermost shelves therein are reachable only by a small percentage of the population. 
     FIGS. 1-3  provide an overview of the novel step so that its general operation may be understood.  FIGS. 4-9  provide views of structural details not readily ascertainable from said  FIGS. 1-3 . 
   The novel step assembly of this invention is depicted in its stored configuration in FIG.  1  and is denoted as a whole by the reference numeral  22 . The height of novel step assembly  22 , when in its stored configuration, is less than the height of overhang vertical wall  23  ( FIG. 1 ) of kitchen counter  12  and the depth of novel step assembly, when in its stored configuration, is slightly less than or substantially equal to the depth of overhang horizontal wall  25  (FIG.  2 ). 
   Accordingly, a person walking pass kitchen counter  12  will not trip over novel step  2  when it is in its  FIG. 1 , fully stored configuration. 
     FIG. 2  provides a perspective view of the same environment when novel step  22  assembly is fully extended but not in its operable or deployed configuration. Back wall  24  thereof is fixedly secured to overhang vertical wall  23 . Openings  24   a ,  24   b  ( FIG. 5 ) are formed in opposite ends of back wall  24  to receive suitable fasteners. 
     FIG. 3  depicts novel step assembly  22  when in its fully deployed, ready-to-use configuration. Front wall  26  is locked into a safe, horizontal position so that a person desiring to reach the uppermost shelves of cupboard  18  may step upon it. A non-skid pad  27  may be placed in overlying relation to front wall  26  to inhibit slipping from said front wall  26  when it functions as a step. 
   Some important structural details of novel step assembly  22  are depicted in FIG.  4 . First rear clevis  28   a  is fixedly secured to back wall  24 . First rear clevis pin  30   a  engages the rearward end of first back rod  32   a  and allows said first back rod to pivot in a horizontal plane with respect to a vertical axis defined by first rear clevis pin  30   a.    
   The fully extended configuration of front wall  26  is depicted in phantom lines in  FIG. 4 , and its fully deployed configuration is depicted in solid lines in said FIG. First forward clevis  34   a  is fixedly secured to the rearward side of front wall  26 . First forward clevis pin  36   a  engages the forward end of first front rod  38   a  and allows said first front rod to pivot with respect to the axis defined by first forward clevis pin  36   a.    
   As depicted in  FIG. 5 , a second rear clevis  28   b  is fixedly secured to an opposite end of back wall  24 , in laterally spaced apart relation to first rear clevis  28   a . Second rear clevis pin  30   b  engages the rearward end of second back rod  32   b  and allows said rod to pivot in a horizontal plane with respect to a vertical axis defined by second rear clevis pin  30   b.    
   Similarly, as suggested by  FIGS. 4 and 6  and as depicted in  FIGS. 7-9 , second forward clevis  34   b  is fixedly secured to the rearward side of front wall  26 . Second forward clevis pin  34   b  engages the forward end of second front rod  38   b  and allows said second front rod to pivot with respect to the axis defined by second forward clevis pin  34   b.    
   First and second back rods  32   a ,  32   b  have respective forward ends pivotally connected to the rearward ends of first and second front rods  38   a ,  38   b  about vertical axes  40   a  and  40   b . These pivotal connections enable said back rods and front rods to fold with respect to one another in a horizontal plane as best understood in connection with  FIGS. 7-9 . 
   The respective forward ends of first and second back rods  32   a ,  32   b  are also pivotally connected to the rearward ends of first and second front rods  38   a ,  38   b  about horizontal axes  42   a  and  42   b , said axes being defined by screws or other suitable pins as depicted. These pivotal connections enable said back rods and front rods to fold with respect to one another in a vertical plane as best understood in connection with  FIGS. 4 and 6 . 
   More particularly, first horizontal pivot block  44   a  is pivotally secured to the forward end of first back rod  32   a  and second horizontal pivot block  44   b  is pivotally secured to the forward end of second back rod  32   b.    
   First vertical pivot block  46   a  is fixedly secured to the rearward end of first front rod  38   a  by a pair of fastening members collectively denoted  48   a  and said first vertical pivot block  46   a  is pivotally connected by pivot pin  42   a  to first horizontal pivot block  44   a . First flared part  47   a  is formed integrally with first vertical pivot block  46   a.    
   Second vertical pivot block  46   b  is fixedly secured to the rearward end of second front rod  38   b  by a pair of fastening members collectively denoted  48   b  and said second vertical pivot block  46   b  is pivotally connected by pivot pin  42   b  to second horizontal pivot block  44   b . Second flared part  47   b  is formed integrally with second vertical pivot block  46   b.    
   Making reference to  FIGS. 7-9 , operation of the novel step includes lightly kicking front wall  26  to cause release springs  29   a ,  29   b  to push said front wall  26  away from stationary back wall  24 . Springs  29   a ,  29   b , cause first back and front rods  32   a ,  38   a  to begin unfolding, as perhaps best understood in connection with  FIG. 8 , until they reach their  FIG. 9  position. Simultaneously, springs  29   a ,  29   b , cause second back and front rods  32   b ,  38   b  to begin unfolding, as perhaps best understood in connection with  FIG. 8 , until they reach their  FIG. 9  position. 
   Springs  29   a ,  29   b  are also depicted in  FIGS. 4-6 . Each spring has a base part that abuttingly engages back wall  24 , a central part that coils about its associated clevis pin  30   a ,  30   b , a horizontally disposed top part that overlies its associated back rod  32   a  or  32   b , and a vertically disposed side part that abuttingly engages an inboard side of its associated back rod  32   a  or  32   b.    
     FIG. 5 , as mentioned above, provides a perspective view of the novel step assembly when in its fully extended ( FIG. 9 ) position. Making reference to both  FIGS. 5 and 9 , front wall  46  is manually lifted from its FIG.  5  and  FIG. 9  position into its  FIG. 6  position. First and second front rods  38   a ,  38   b  pivot about horizontal pivot pins  42   a ,  42   b  until said first and second front rods are vertically disposed with respect to the kitchen floor, i.e., until said first and second rods are perpendicular to first and second back rods. 
   First and second flared parts  47   a ,  47   b  of vertical pivot blocks  46   a ,  46   b , respectively, provide an enhanced stability of the assembly as best understood in connection with FIG.  6 . 
   It will thus be seen that the objects set forth above, and those made apparent from the foregoing description, are efficiently attained. Since certain changes may be made in the above construction without departing from the scope of the invention, it is intended that all matters contained in the foregoing description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense. 
   It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention that, as a matter of language, might be said to fall therebetween. 
   Now that the invention has been described,

Technology Category: 1