Rotationally secured column

Patent 5944290 Issued on August 31, 1999. Estimated Expiration Date:

July 16, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3004743

Surgical chair for a doctor
Patent #: 4061304
Issued on: 12/06/1977
Inventor: Schattmaier

Support devices for swivel chairs
Patent #: 4415135
Issued on: 11/15/1983
Inventor: French

Chair height adjustment mechanism
Patent #: 4750701
Issued on: 06/14/1988
Inventor: Folson , et al.

Continuously adjustable levelling column
Patent #: 4756496
Issued on: 07/12/1988
Inventor: Hosan , et al.

Seat damper assembly
Patent #: 4842238
Issued on: 06/27/1989
Inventor: Toiyama

Control assembly for chair height adjustment
Patent #: 5031869
Issued on: 07/16/1991
Inventor: Strater, et al.

Pillar intended to form part of a furniture support equipped with a gas spring
Patent #: 5284312
Issued on: 02/08/1994
Inventor: Dony

Telescoped tubular support members
Patent #: 5385323
Issued on: 01/31/1995
Inventor: Garelick

Guide means for telescoping cylindrical parts and a column unit comprising such guide means
Patent #: 5443573
Issued on: 08/22/1995
Inventor: Thiele, et al.

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Inventors

Assignee

Stabilus GmbH

Application

No. 895463 filed on 07/16/1997

US Classes:

248/161, Adjustable vertically248/188.5, Telescoping248/404, With force multiplying means297/344.19Gas or hydraulic cylinder

Examiners

Primary: Berger, Derek J.

Attorney, Agent or Firm

Baker & Botts, L.L.P.

Foreign Patent References

0366128 EP. 05/21/1990
1554216 DE. 04/21/1970
4313766 DE. 11/21/1994
4428259A1 DE. 02/21/1996

International Class

A47C 003/30

Foreign Application Priority Data

1996-07-17 DE

Abstract

A vertically adjustable column, in particular for chairs or tables, includes a pedestal tube having a coaxially arranged lengthwise adjusting element, e.g., a gas spring, and a rotational fixation profile engaging a counterpart profile extending parallel to the longitudinal centerline of the pedestal tube. The rotational fixation profile and the counterpart profile are operatively arranged between the pedestal tube and the lengthwise adjusting element, and one of the profile parts is arranged in series with the lengthwise adjusting element.