Patent ID: 6978721

Claim:
A fold-down work surface comprising: a planar top frame having first and second opposite ends and mounted thereto at least one parallelogram frame, said at least one parallelogram frame mounted to corresponding slides, said top frame forming an upper longitudinal element in said at least one parallelogram frame, each parallelogram frame of said at least one parallelogram frame lying in a corresponding vertical plane, and including a lower longitudinal element, parallel to the said frame, extending between said corresponding slides at a first end of said lower longitudinal element and at least one leg at an opposite second end of said lower longitudinal element, each said corresponding slide and each leg of said at least one leg, at the corresponding said second end of said lower longitudinal element, pivotally mounted to said first and second ends of said top frame and to the opposite first and second ends of said lower longitudinal element so that said top frame, said lower longitudinal element, said slide, and said leg for each parallelogram frame form a frame pivotable in said corresponding vertical plane, wherein each said slide is slidably mounted in a vertical track which is mountable to a vertical rigid supporting surface having a constraining upper edge, wherein at least one primary brace member is pivotally mountable, by mounting means, at a lower end thereof to the supporting surface, and an opposite upper end of each primary brace member of said at least one primary brace member is pivotally mounted to said top frame adjacent said first end of said top frame so that said upper end of said each primary brace member is pivotally mounted to, so as to be disposed between, said top frame and said mounting means when mounted adjacent said vertical track on said supporting surface, wherein, as said top frame is raised or lowered relative to the supporting surface, when said vertical track and primary brace member are mounted to the supporting surface, translation of said first end of said top frame is constrained by rotation of said top frame about said upper end of said each primary brace member and by vertical sliding translation of said each slide in its corresponding said vertical track so that, as said second end of said top frame is raised in an arc so that the second end is brought into adjacency with the constraining upper edge of the supporting surface as said top frame is brought flush with the supporting surface, said first end of said top frame is lowered into adjacency with the bottom of the supporting surface.