Releasable lock forchair control mechanism
First Claim
1. A chair control mechanism comprising:
- (a) a housing,(b) a set of lamellas in said housing for connection to a chair part to allow selective movement of said chair part, said lamellas having aligned openings therein,(c) a shaft extending into said housing and through said openings in said lamellas, one end of said shaft being fixed relative to said housing,(d) a slide member slidable on said shaft and extending through said housing and having a first end adjacent said lamellas and a second end outside said housing,(e) said slide member being slidable on said shaft between a first position in which said first end applies pressure to compress said lamellas and a second position in which said first end is moved away from said lamellas to release the pressure on said lamellas,(f) biasing means biasing said slide member to said first position to compress said lamellas together, said biasing means located between said housing and said first end of said slide member,(g) and cam means connected to the second end of said slide member and operable to cam said slide member to said second position, to selectively lock and unlock said lamellas.
1 Assignment
0 Petitions
Accused Products
Abstract
A chair control mechanism having compressible lamellas which when compressed lock a chair back and/or seat in position and when decompressed allow adjustment of the chair seat and/or back, and housing a releasable lock to compress and decompress the lamellas. The lock includes a U-shaped slide member slidable on the same shaft as that on which the lamellas are mounted, and having its cross member pressed against the lamellas and its free ends projecting through slots in a housing side wall. A coil spring between the side wall and connecting member biases the slide member against the lamellas to compress them. A cam connected to the legs of the slide member outside the side wall is moveable to pull the slide member outwardly through the side wall to release the pressure on the lamellas.
28 Citations
10 Claims
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1. A chair control mechanism comprising:
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(a) a housing, (b) a set of lamellas in said housing for connection to a chair part to allow selective movement of said chair part, said lamellas having aligned openings therein, (c) a shaft extending into said housing and through said openings in said lamellas, one end of said shaft being fixed relative to said housing, (d) a slide member slidable on said shaft and extending through said housing and having a first end adjacent said lamellas and a second end outside said housing, (e) said slide member being slidable on said shaft between a first position in which said first end applies pressure to compress said lamellas and a second position in which said first end is moved away from said lamellas to release the pressure on said lamellas, (f) biasing means biasing said slide member to said first position to compress said lamellas together, said biasing means located between said housing and said first end of said slide member, (g) and cam means connected to the second end of said slide member and operable to cam said slide member to said second position, to selectively lock and unlock said lamellas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification