Height adjustable work surface

Abstract

A tabletop positioning and locking assembly is described for use with a modular trapezoidal table frame structure that utilizes trapezoid tube weldments. The positioning and locking assembly automatically positions the tabletop on the trapezoidal table frame at the exact desired location in relation to the frame, and also securely locks the tabletop down onto the table frame without the need for hardware or tools.

What is claimed is: 
     
         1 . A table comprising:
 a tabletop;   a table frame having a first table frame member and a second table frame member substantially parallel to the first table frame member;   the first table frame member having a first angled side and the second table frame having a second angled side;   a first cam activated locking mechanism attached to the tabletop, the first cam activated locking mechanism engaging the first angled side of the first table frame member;   a second cam activated locking mechanism attached to the tabletop, the second cam activated locking mechanism engaging the second angled side of the second table frame member to secure the tabletop to the table frame.   
     
     
         2 . The table of  claim 1  wherein the first table frame member has a trapezoidal cross section. 
     
     
         3 . The table of  claim 2  wherein the second table frame member has a trapezoidal cross section. 
     
     
         4 . The table of  claim 1  wherein the first cam activated locking mechanism forces an angled surface into direct contact with the first angled side of the first table frame member. 
     
     
         5 . The table of  claim 4  wherein the second cam activated locking mechanism forces an angled surface into direct contact with the second angled side of the second table frame member. 
     
     
         6 . The table of  claim 1  wherein the first cam activated locking mechanism and the second cam activated locking mechanism generate forces directed towards each other. 
     
     
         7 . The table of  claim 1  wherein the first cam activated locking mechanism and the second cam activated locking mechanism generate forces directed opposite of each other. 
     
     
         8 . A table including a tabletop and a table frame;
 the table frame having at least two members with a trapezoidal cross section;   at least two attachment mechanisms secured to the tabletop that secure the tabletop to the table frame by engaging the sides of the two members.   
     
     
         9 . The table of  claim 8  wherein the two attachment mechanism are cam activated locking mechanisms. 
     
     
         10 . The table of  claim 9  wherein the two attachment mechanisms have angled surfaces that abut the angled surfaces of the two members with trapezoidal cross sections. 
     
     
         11 . A table including a tabletop and a table frame;
 the table frame comprising four members oriented substantially horizontal and four legs oriented substantially vertical;   the first member and second member being substantially parallel;   the tabletop including at first locking mechanism and a second locking mechanism attached to the underside of the tabletop; the first locking mechanism exerting force against the first member and the second locking mechanism exerting force against the second member to secure the tabletop to the table frame.   
     
     
         12 . The table of  claim 11  wherein the first member and second member have a trapezoidal cross section. 
     
     
         13 . The table of  claim 11  wherein the first and second locking mechanism is a cam activated locking mechanism.