Rotation mechanism for sequential angular variation of a...

Details Rotation mechanism for sequential angular variation of a... Rotation mechanism for sequential angular variation of a...

2006-11-14

2006-11-14

Nelson, Jr., Milton (Department: 3636)

Chairs and seats

Movable back

Tiltable

C297S378120

Reexamination Certificate

active

07134724

ABSTRACT:
The adjustment device comprises a toothed quadrant connected to the sitting surface, and a toothed quadrant which is connected to the back and which can be meshed into the toothed quadrant connected to the sitting surface, in a locked configuration of the seat, and can be demeshed from the toothed quadrant connected to the sitting surface, in an unlocked configuration of the seat, making it possible to adjust the angular position of the back with respect to the sitting surface,an element which possesses a stepped quadrant having a first convex surface and at least one second convex surface, each defining an angular sequence, which are connected to one another by a stop surface,a pawl possessing a tooth capable of following each convex surface until it comes to bear against a stop surface, and an element to pivot the pawl in order to release the tooth from a stop surface, so as to cause the seat to change from one angular sequence to the next sequence.

REFERENCES:
patent: 4314729 (1982-02-01), Klueting
patent: 4591207 (1986-05-01), Nithammer et al.
patent: 4836608 (1989-06-01), Sugiyama
patent: 4884845 (1989-12-01), Schmale et al.
patent: 5390980 (1995-02-01), Premji et al.
patent: 6139104 (2000-10-01), Brewer
patent: 6139105 (2000-10-01), Morgos et al.

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