Bilateral, warp-tolerant, cross-synchronized, gear-lock...

Details Bilateral, warp-tolerant, cross-synchronized, gear-lock... Bilateral, warp-tolerant, cross-synchronized, gear-lock...

2005-11-22

2005-11-22

White, Rodney B. (Department: 3636)

Chairs and seats

Movable back

Tiltable

C297S36700R

Reexamination Certificate

active

06966605

ABSTRACT:
A seat structure with two, lateral-side latching-unlatching mechanisms for enabling smoothly operating releasable locking and unlocking actions between a seat-base and an inclinable seat-back hinged to the seat-base in the seat structure. Two interengageable arcs of gear teeth forming part of each mechanism engage and release selectively under rocker-lever seat-occupant control to lock and unlock the seat-back for inclinational fixation and adjustment, and, as determined by tooth-pitch in the arcs, enable positive locking to take place in a large number of specific, small-angular-difference, seat-back inclinations. A floating cross-shaft, and two rocker cams joined thereto, interconnect the two lateral side mechanisms. The seat-base is fully twist-deformable in a catastrophic event replicating a conventional rack-and-roll test without the seat-back becoming unlocked relative to the seat-base.

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