A desktop assembly and height adjustment frame mechanism that facilitates height adjustment of said desktop, said desktop assembly and height frame adjustment mechanism comprising:
- a. a desktop assembly for placement in a stationary position on top of an existing desk comprising upper and lower platform surfaces each configured to support one or more monitors and a keyboard;
- b. a frame adjustment mechanism for adjustably supporting said desktop comprising:
- i. an upper support frame, including a left upper bracket and a right upper bracket, wherein each of said left and right upper brackets includes proximal and distal ends and each contain horizontal channels at their distal ends and wherein each of said left and right upper brackets is fixedly attached to the underside of said upper platform surface of said desktop;
- ii. a base support frame, including a left lower bracket and a right lower bracket, wherein each of said left and right lower brackets includes proximal and distal ends and each contain horizontal channels at their distal ends and wherein each of said left and right lower brackets is fixedly attached to the topside of said base support frame;
- iii. an X-shaped support frame that pivotally connects said upper support frame and said base support frame and permits a user to selectively adjust the height of said upper and lower platform surfaces of said desktop by vertically moving the desktop about a perpendicular axis relative to said base support frame, wherein said X-shaped support frame comprising a pair of left and right first pivot legs pivotally interconnected at the center to a pair of left and right second pivot legs, wherein:
- aa. said first pivot legs each having lower and upper ends, wherein said lower ends of said first pivot legs are pivotally connected to said proximal ends of each of said left and right lower brackets, and wherein said upper ends of said first pivot legs are pivotally and slideably attached within said horizontal channels of said distal ends of said left and right upper brackets, and wherein said first pivot legs are further connected to each other by one or more lateral stabilizing bars;
- bb. said second pivot legs each having lower and upper ends, wherein said upper ends of said second pivot legs are pivotally connected to said proximal ends of each of said left and right upper brackets, and wherein said lower ends of said second pivot legs are pivotally and slideably attached within said horizontal channels of said left and right lower brackets, and wherein said second pivot legs are further connected to each other by one or more lateral stabilizing bars;
- cc. a pair of hydraulic cylinders for facilitating raising and lowering said upper and lower platform surfaces, wherein each hydraulic cylinder has a lower end and an upper end, and wherein said lower end of each hydraulic cylinder is connected to said proximal ends of each of said left and right lower brackets, and wherein said upper end of each hydraulic cylinder is attached to the middle portion of each of said first pivot legs;
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- dd. a pair of manually adjustable locking levers, each pivotally attached to said upper platform surface and wherein each locking lever includes multiple teeth for selecting and mateably engaging one of said selected teeth with said left and right upper brackets for incrementally locking and unlocking the upper and lower platform surfaces at a selected height.