Deflectable seat back

Details Deflectable seat back Deflectable seat back

1994-01-31

1996-04-09

Cranmer, Laurie K.

Chairs and seats

Back movement resiliently opposed in operating position

Back adjusts independent of seat

2973034, 297374, 29744021, A47C 300

Patent

active

055055222

ABSTRACT:
A mechanism is provided for detachably interconnecting a seat base and a seat back of a chair such that the application of pressure to the seat back causes deflection therebetween and which returns to its normal orientation upon releasing the applied pressure. The mechanism includes a plate member secured to the chair frame adjacent the seat base. A upstanding link member is pivotably secured to the plate member and the two are interconnected with a spring member for providing resistance to the pivoting motion. The upstanding link member is further formed with a lost-motion slot through which extends a pin which is secured into the plate member for thereby limiting the amount of deflection. The upper portion of the upstanding link member is formed to receive a detachable seat back assembly. The detachable seat back mechanism of the present invention is also uniquely adapted to provide at least two means for adjusting the amount of pressure required on the seat back to cause deflection.

REFERENCES:
patent: 2427174 (1947-09-01), White
patent: 3525549 (1970-08-01), Knabusch et al.
patent: 3973798 (1978-08-01), White
patent: 4477118 (1984-10-01), Ruble
patent: 4693514 (1987-09-01), Volkle
patent: 4852943 (1989-08-01), Roper
patent: 5184871 (1993-02-01), LaPointe et al.

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