Support column unit

Details Support column unit Support column unit

Filed on

1983-10-24

Date issued

1986-04-08

Examiner

Britts, Ramon S.

Patent Class

Supports

SubClass

Stand

SubSubClass

Standard type

Other Related Categories

248631, F16M 1100

Type

Patent

Status

active

Patent number

045807493

Description

ABSTRACT:
A resilient support column for height-adjustable chairs or the like includes a piston-and-cylinder type pneumatic spring that is installable in and removable from the column by means of a retaining sleeve structure carried by the spring. The retaining sleeve is connected to the column through a threaded connection that permits quick one-step insertion of the combined sleeve-spring unit into the column, while thereafter affording the advantage of threaded adjustment within the column or threaded removal therefrom. A simple mechanical fastener holds the retaining sleeve in place on the pneumatic spring during shipment and/or assembly.

REFERENCES:
patent: 1951730 (1934-03-01), Johnson
patent: 3711054 (1973-01-01), Bauer
patent: 3741592 (1973-06-01), Muncy
patent: 3788587 (1974-01-01), Stemmler
patent: 3794309 (1974-02-01), Chrokey et al.
patent: 4072288 (1978-02-01), Wirges et al.
patent: 4139175 (1979-02-01), Bauer
patent: 4183689 (1980-01-01), Wirges et al.
patent: 4245826 (1981-01-01), Wirges
patent: 4329800 (1982-05-01), Shuman
patent: 4415135 (1983-11-01), French

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Also associated with

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