Height adjustable desktop work surface

Abstract

In one example, a height adjustable desktop system is described that can include a work surface, a foot assembly and a linkage assembly that adjustably connects the work surface to the foot assembly allowing vertical adjustment of the work surface. The linkage assembly can include a pair of adjustment assemblies, each having a transverse linkage that maintains the work surface in a horizontal orientation as the work surface is elevated or lowered. A biasing mechanism, such as an extension spring or a torsion spring, biases the work surface toward the elevated position.

What is claimed is: 
     
         1 . A height adjustable desktop system, comprising:
 a work surface defining an underside and including a glide support and a support bracket positioned on the underside of the work surface;   a foot assembly including at least one foot bracket;   an adjustment assembly including:
 a glider slidable on the glide support; 
 a first linkage rotatably connected to the glider and rotatably connected to the foot bracket, wherein the first linkage is rotatable within a first plane; 
 a second linkage rotatable with the first linkage, the second linkage rotatably connected to the glider and rotatably connected to the foot bracket, wherein the second linkage is rotatable within a second plane parallel to and offset from the first plane; and 
 a transverse linkage rotatably connected to the support bracket and rotatably connected to the second linkage; 
   wherein the glider is slidable on the glide support between a first position proximate to the support bracket and a second position distal to the support bracket; wherein the first, second and transverse linkages are extended when the glide is positioned in the first position to position the work surface at an elevated position, wherein the first, second and transverse linkages are collapsed when the glide is positioned in the second position to position the work surface at a lowered position.   
     
     
         2 . The height adjustable desktop system of  claim 1 , wherein the work surface defines a primary top surface opposite the underside. 
     
     
         3 . The height adjustable desktop system of  claim 2 , wherein the work surface includes a shelf defining a secondary top surface lower than the primary top surface. 
     
     
         4 . The height adjustable desktop system of  claim 3 , wherein the shelf includes an attachment bracket for positioning the secondary top surface below the primary top surface. 
     
     
         5 . The height adjustable desktop system of  claim 1 , wherein the foot assembly includes a foot portion. 
     
     
         6 . The height adjustable desktop system of  claim 5 , wherein the foot portion includes a planar element for interfacing with a desktop. 
     
     
         7 . The height adjustable desktop system of  claim 5 , wherein the foot portion includes a wall bracket securable to a wall. 
     
     
         8 . The height adjustable desktop system of  claim 5 , wherein the foot portion includes a U-shaped element having a pair of arms for stabilizing the foot assembly. 
     
     
         9 . The height adjustable desktop system of  claim 1 , wherein the adjustment assembly includes an extension spring operably connected to the glider. 
     
     
         10 . The height adjustable desktop system of  claim 9 , wherein the extension spring operably connects the glider to the transverse linkage. 
     
     
         11 . The height adjustable desktop system of  claim 9 , wherein the extension spring operably connects the glider to a spring holding bracket affixed to the underside of the work surface. 
     
     
         12 . The height adjustable desktop system of  claim 1 , wherein the adjustment assembly includes a torsion spring that is tensioned between the underside of the work surface and the transverse linkage as the work surface is lowered to bias the work surface toward an elevated position. 
     
     
         13 . The height adjustable desktop system of  claim 1 , wherein the glide support includes a glide rod defining a plurality of indentations. 
     
     
         14 . The height adjustable desktop system of  claim 13 , wherein the glider defines a first glide hole and a second glide hole aligned with the first glide hole, wherein the glide rod is receivable in the first and second glide hole such that the glider is slidable on the glide rod. 
     
     
         15 . The height adjustable desktop system of  claim 14 , wherein the second glide hole defines a flat edge;
 wherein the glide rod is rotatable between a first position in which the indentations are aligned to engage the flat edge to prevent sliding of the glider on the glide rod and a second position in which the indentations are out of alignment with the flat edge to allow sliding of the glider on the glide rod.   
     
     
         16 . The height adjustable desktop system of  claim 15 , wherein the glide rod includes a lever operable to rotate the glide rod. 
     
     
         17 . The height adjustable desktop system of  claim 1 , wherein the transverse linkage includes a fan portion and defines a plurality of holes in the fan portion arranged in an arc. 
     
     
         18 . The height adjustable desktop system of  claim 17 , wherein the height adjustable desktop system includes a piston having a piston pin;
 wherein the piston pin is movable between an extended position in which the pin intersects one of the holes to prevent rotation of the transverse linkage and fixing elevation of the work surface and a retracted position allowing rotation of the transverse linkage permitting movement of the work surface.   
     
     
         19 . A height adjustable desktop system, comprising:
 a work surface;   a foot assembly;   a linkage assembly rotatably coupled to the work surface and rotatable coupled to the foot assembly, wherein the linkage assembly is configured to rotate the work surface between a lowered position and an elevated position generally perpendicular to the work surface.