Claims
- 1. A platform support mechanism comprising, in combination:
(a) a first bracket member; (b) a linkage arm assembly having a first end and second end pivotally connected at a first end to the first bracket member; (c) a second bracket member pivotally connected to the linkage arm assembly at the second end; (d) a brake mechanism for preventing pivotal movement of the pivotal connection of the linkage arm assembly at one end, said brake mechanism including a slide member pivotally connected to a bracket member and a housing for the slide rod member attached to the linkage arm assembly mechanism further including a gripping element mounted on the housing and movable between a first slide member gripping and holding position and a second slide member release position.
- 2. The support mechanism of claim 1 wherein the slide member comprises a rod and the gripping element comprises a spring mounted on the rod member.
- 3. The mechanism of claim 1 further including a second platform support mechanism, said second platform support mechanism including a first bracket member, a second bracket member, a linkage arm assembly pivotally connecting the first bracket member to the second bracket member and a first cross member linking the first bracket members and a second cross member linking the linkage arm assemblies.
- 4. The mechanism of claim 1 wherein the gripping element comprises a clamp member fitted on the rod member and a spreading element to spread the clamp member fitted on the rod member and a spreading element to spread the clamp member to release the rod member.
- 5. The mechanism of claim 3 further including a manual release control member mounted on a cross member
- 6. The mechanism of claim 3 where in the gripping element comprises a coil spring member.
CROSS REFERENCE TO RELATED APPLICATION
[0001] This utility application is a continuation in part application of Ser. No. 10/266,912 filed Oct. 8, 2002 which is a continuation of Ser. No. 10/022,432 filed Dec. 13, 2001, now U.S. Pat. No. 6,460,816 entitled Adjustable Computer Keyboard Platform Support Mechanism which is a continuation of Ser. No. 09/467,796 filed Dec. 21, 1999 now U.S. Pat. No. 6,336,618 which was based on a provisional application, Serial No. 60/159,660 that was filed Oct. 15, 1999 and for which priority is claimed with respect to all said cross referenced applications.
Provisional Applications (1)
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Number |
Date |
Country |
|
60159660 |
Oct 1999 |
US |
Continuations (2)
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Number |
Date |
Country |
Parent |
10022432 |
Dec 2001 |
US |
Child |
10395922 |
Mar 2003 |
US |
Parent |
09467697 |
Dec 1999 |
US |
Child |
10022432 |
Dec 2001 |
US |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
10266912 |
Oct 2002 |
US |
Child |
10395922 |
Mar 2003 |
US |