Claims
- 1. An improved adjustable support mechanism for a keyboard platform assembly of the type including a platform supported by said support mechanism, said platform associated with a desk, said mechanism comprising in combination:
- a mounting plate for attachment to the underside of the desk surface member;
- a slide assembly cooperative with the mounting plate and slidable between an extended position and a retracted position;
- first bracket means projecting downwardly from the slide assembly, said first bracket means including an upper pivot and a lower pivot;
- a forward platform for support of a keyboard;
- second bracket means projecting downwardly from the forward platform, said bracket means including an upper pivot and a lower pivot;
- a first linkage arm between the upper pivots;
- a second linkage arm between the lower pivots whereby the arms and pivots provide a non-parallel unequal connecting linkages between the pivots, said arms defining means for tilting the platform from a first horizontal orientation to a second, not horizontal position as the platform is moved by the pivoting of the arms; and
- spring means for biasing the linkage arms about the axes of pivots wherein the spring means comprises a compressible fluid cylinder connected between the pivots of the first and second bracket means.
BACKGROUND OF THE INVENTION
This is a continuation-in-part of my earlier filed, copending patent application, Ser. No. 07/537,422, filed Jun. 13, 1990, now issued as U.S. Pat. No. 5,037,054.
US Referenced Citations (29)
Foreign Referenced Citations (5)
Number |
Date |
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1026723 |
Feb 1978 |
CAX |
1204420 |
May 1986 |
CAX |
2320344 |
Nov 1974 |
DEX |
2836655 |
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DEX |
2176996 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
537422 |
Jun 1990 |
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