Force multiplier device for furniture member adjustment

Details Force multiplier device for furniture member adjustment Force multiplier device for furniture member adjustment

2008-02-29

2011-12-20

Barfield, Anthony D (Department: 3636)

Chairs and seats

Chair hardware or attachment

C297S463200

Reexamination Certificate

active

08079645

ABSTRACT:
A furniture member component drive mechanism includes a force multiplying gear assembly. A wire member can slide within a flexible sheath in opposed first and second directions. The wire member is connected to the gear assembly for axial displacement. A lever arm connected to the gear assembly defines a lever arm first axis of rotation. Rotating the lever arm in a first direction about the first axis of rotation axially incrementally displaces the wire member in the first displacement direction. The lever arm is rotatably connected to a pivot base defining a second axis of rotation of the lever arm transverse to the first axis of rotation. Rotating the lever arm about the second axis of rotation displaces the wire member in the second displacement direction.

REFERENCES:
patent: 4828213 (1989-05-01), Saito et al.
patent: 4834333 (1989-05-01), Saito et al.
patent: 5107720 (1992-04-01), Hatfield
patent: 5497676 (1996-03-01), Barnard
patent: 7150205 (2006-12-01), Takachi
patent: 7862121 (2011-01-01), Ishijima et al.
patent: WO 2007086468 (2007-08-01), None

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