Patent · US Expired

Gas spring adjustable in length for vertically adjustable chairs, tables and the like

US4844392A · kind A · utility

24Cited by

6References

14Claims

0Family size

Assignee

Fritz Bauer + Sohne oHG · DE

Inventors

Hans-Peter Bauer · Altdorf, DE
Hans J. Bauer · Altdorf, DE
Adolf Gebhardt · Feucht, DE

Key dates

Filing date	Nov 18, 1987
Grant date	Jul 4, 1989
Priority date	—
Expiry date	Nov 18, 2007

Classification

Technology area (CPC A)Human Necessities
CPC primaryA47C3/30
WIPO fieldFurniture, games
WIPO sectorOther fields

Abstract

A gas spring adjustable in length has a housing and a piston rod brought out at one end. Disposed at the opposite end is a valve by means of which movements of longitudinal adjustment of the piston rod relative to a housing filled with a pressure medium are released or stopped. These gas springs are principally used for the vertical adjustment of chairs or tables. In order to make said vertical adjustment more comfortable, a damper valve is disposed in the valve effecting in different manner in each instance the throttling on the insertion of the piston rod into the housing or on the extraction of said piston rod out of the housing.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.