Adjustable gas cylinder chair control

Details Adjustable gas cylinder chair control Adjustable gas cylinder chair control

1977-01-31

1978-09-12

Parsons, Jr., Marion

Supports

Stand

Standard type

248404, 2481882, 188300, 297347, F16M 1100, F15B 1517

Patent

active

041132203

ABSTRACT:
An adjustable gas cylinder control comprising the combination of a single tube defining a single cylinder bore, a single piston slidable in the tube and dividing the tube into a first and a second compartment, a first and a second end plug adapted to sealably fit within the ends of the tube, a single spindle or rod fixedly mounted to the piston and reciprocable in the tube, gas inlet means for charging the sealed first compartment of the tube with gas, and valve means mounted in the piston and spindle for allowing gas flow between the first and second compartments of the tube thereby adjusting the position of the piston in the tube. The tube itself is made of rolled welded sheet metal with its ends having a simple cold formed impression holding the first and second end plugs. Also provided is actuating means including a lever connected to the spindle for actuating the valve means thereby allowing gas flow between the compartments of the tube. The distal portion of the first end plug including the gas inlet means is sized and adapted to fit a variety of chair bases and the distal end of the spindle is tapered and adapted to fit a variety of chair seats. In combination with a chair, the adjustable control provides structural support and allows the height of the chair seat to be readily varied while also providing a cushioning effect to the person seated.

REFERENCES:
patent: 2042443 (1936-05-01), Buckstone
patent: 2446127 (1948-07-01), Cramer
patent: 2837387 (1958-06-01), Greville
patent: 3223206 (1965-12-01), Bainbridge et al.
patent: 3285207 (1966-11-01), Hagen
patent: 3388883 (1968-06-01), Axthammer et al.
patent: 3790119 (1974-02-01), Bauer
patent: 3828651 (1974-08-01), Dorner et al.
patent: 3921952 (1975-11-01), Wirge

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