Chair with tiltable spring biased back-rest

Details Chair with tiltable spring biased back-rest Chair with tiltable spring biased back-rest

1975-10-15

1977-01-25

McCall, James T.

Chairs and seats

Movable back

Tiltable

A47C 300

Patent

active

040048365

ABSTRACT:
A wheel-chair having a spring biased tiltable back-rest. The resilient force exerted on the back-rest by the spring is continuously adjustable to suit the actual person sitting in the chair. Preferably, the spring is a gas spring which is combined with a device reducing the effect of the gas spring when the back-rest is in its upright position and adds to its effect when the back-rest is adjacent or in its horizontal position.

REFERENCES:
patent: 3024067 (1962-03-01), Brandoli
patent: 3185495 (1965-05-01), Pivacek
patent: 3455601 (1969-07-01), Lie
patent: 3528532 (1970-09-01), Moskow
patent: 3602537 (1971-08-01), Kerstholt

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