Patent · US Expired

Longitudinally adjustable gas spring

US5273259A · kind A · utility

10Cited by

5References

9Claims

0Family size

Assignee

SUSPA GMBH · DE

Inventors

Hans J. Bauer · Altdorf, DE
Hans-Peter Bauer · Altdorf, DE
Jochen Meyer · Creußen, DE
Jurgen Spathe · Creußen, DE
Herbert Wolf · Wooster, US

Key dates

Filing date	Mar 20, 1991
Grant date	Dec 28, 1993
Priority date	—
Expiry date	Mar 20, 2011

Classification

Technology area (CPC A)Human Necessities
CPC primaryA47C3/30
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

In the case of a longitudinally adjustable gas spring with two tubes enclosing each other concentrically and with a valve at one end and with a relief channel at the end where the piston rod exits the inner tube consists of plastics material. It has groove-like channels on its external wall which connect the relief channel with the valve. The webs between adjacent channels bear against the internal wall of the outer tube. The result is a cost-saving structure of the inner tube, which at the same time becomes very stable and is easy to manufacture.

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