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US 5,490,466 AGranted
Adjustable keyboard support
AssigneeHowe Furniture Corporation
InventorNiels Diffrient
Life of this patent
Estimating the term…
Abstract
A table top is provided with a vertically adjustable keyboard support platform which is suspended on a parallel linkage assembly. The parallel linkage rotates about a pair of rotatable pivot rods carried by the underneath side of the platform. A gas spring is connected to the linkage to block its rotation when the platform is in a desired lowered position and to aid in returning the platform to a position flush with the table top.
Claims9
A table top having a top surface, an underneath surface, at least one edge, and a keyboard support platform comprising:
- a substantially rectangular recess formed in said table top including first and second ends extending inwardly from said edge;
- a substantially rectangular, vertically adjustable, platform substantially filling said recess when in a raised position, said platform having a bottom surface and a top surface;
- first and second substantially identical parallel linkage bars, each having a first end pivotally mounted in the first end of said recess and a depending second end;
- third and fourth parallel linkage bars substantially identical to said first and second bars, each having a first end pivotally mounted in the second end of said recess and a depending second end;
- a first rotatable pivot rod carried by said platform, said first pivot rod having first and second ends secured, respectively, to the depending ends of said first and third bars;
- a second rotatable pivot rod substantially parallel to said first pivot rod, said second pivot rod having first and second ends secured, respectively, to the depending ends of said second and fourth bars;
- and
- means for locking the rotation of said pivot rods to stabilize the vertical position of said platform relative to said table top.
5 more elements
Dependencies are inferred from the claim text.