Vertically adjustable support for a chair or table

Details Vertically adjustable support for a chair or table Vertically adjustable support for a chair or table

1999-05-17

2001-07-31

Ramirez, Ramon O. (Department: 3632)

Supports

Stand

Standard type

C297S344180

Reexamination Certificate

active

06267337

ABSTRACT:

The present invention relates to a support, especially for chairs, tables and the like, with an arrangement for adjusting the length of the support, and with a sleeve for the guiding of the adjusting arrangement, whereby this sleeve is inserted in a guiding tube.
It is known, that the outside of those adjusting equipments, which are used in the supports of said type, is generally tubular shaped. It is also known that extraordinary large lateral forces, caused for example by a strong one-sided loading of the seat of a chair, can act on the adjusting equipment. The users of the chair or of a table, having such a support or the like, request, that the adjusting equipment sits free of wabbling in the guiding tube also when extremely large lateral forces are present and that the length of said equipment nevertheless can be adjusted. This demand can be satisfied in that manner, that the adjusting equipment is fitted in the guiding tube with a high precision. But the related manufacturing costs are correspondingly high.
The object of the present invention is to eliminate not only said disadvantages but also further disadvantages of the prior art.
This object is achieved at the support of the generic type defined in the beginning of this specification in accordance with the present invention in a manner which is defined in the characteristic part of the patent claim
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REFERENCES:
patent: 3913187 (1975-10-01), Okuda
patent: 5413414 (1995-05-01), Bauer
patent: 5496115 (1996-03-01), Bauer
patent: 5836699 (1998-11-01), Back
patent: 5865542 (1999-02-01), Ryu
patent: 5888014 (1999-03-01), Lung et al.
patent: 9200884 (1992-04-01), None
patent: 0551604 (1993-07-01), None

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