Backrest-tilting device

Details Backrest-tilting device Backrest-tilting device

2005-09-21

2010-06-01

Edell, Joseph F (Department: 3636)

Chairs and seats

Back movement resiliently opposed in operating position

Adjustable resistance

C297S300400

Reexamination Certificate

active

07726740

ABSTRACT:
A back rest tilting device in a reclining chair formed of fewer parts. A force promoting unit energizes a back rest in an upright direction. A rotating force promoting unit with rubber torsion springs includes a laterally extending pivot shaft rotated integrally with the back rest and an elastic body filled between an outer tube locked to a support body coaxially with the core and the pivot shaft so that the elastic body is elastically deformed when the pivot shaft is rotated about the center axis of the outer tube to impart a returning rotating force to the pivot shaft.

REFERENCES:
patent: 2677411 (1954-05-01), Grabarczyk
patent: 4537445 (1985-08-01), Neuhoff
patent: 4796950 (1989-01-01), Mrotz et al.
patent: 4986601 (1991-01-01), Inoue
patent: 6386634 (2002-05-01), Stumpf et al.
patent: 6439661 (2002-08-01), Brauning
patent: 6-327533 (1994-11-01), None
patent: 2002-142899 (2002-05-01), None
patent: 2004-49717 (2004-02-01), None
International Search Report PCT/JP2005/017354 dated Dec. 21, 2005 (Japanese Patent Office).

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