Adjustable-height chair column

Details Adjustable-height chair column Adjustable-height chair column

2005-01-21

2008-12-23

Baxter, Gwendolyn (Department: 3632)

Supports

Resilient support

Including spring zone understructure

C248S157000

Reexamination Certificate

active

07467774

ABSTRACT:
An adjustable-height chair column comprises an upright tube and a gas spring that is disposed coaxially in the upright tube. The gas spring comprises a valve for actuation of the gas spring. This valve is embodied for opening upon relief of the casing of the gas spring in relation to the upright tube.

REFERENCES:
patent: 3656593 (1972-04-01), Bauer
patent: 4245826 (1981-01-01), Wirges
patent: 4871149 (1989-10-01), Dony et al.
patent: 5620067 (1997-04-01), Bauer et al.
patent: 5806828 (1998-09-01), Rothe et al.
patent: 6276756 (2001-08-01), Cho et al.
patent: 6474619 (2002-11-01), Ma
patent: 2006/0175743 (2006-08-01), Chung
patent: 44 28 259 (1997-04-01), None

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