Patent · US Expired

Longitudinally adjustable gas spring with dual layered cylinder

US5620067A · kind A · utility

16Cited by

6References

7Claims

0Family size

Assignee

SUSPA GMBH · DE

Inventors

Hans J. Bauer · Altdorf, DE
Walter Bohm · Leverkusen, DE

Key dates

Filing date	Jul 28, 1995
Grant date	Apr 15, 1997
Priority date	—
Expiry date	Jul 28, 2015

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16F2226/02
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A longitudinally adjustable gas spring for adjustable-height chairs, tables or the like has an external cylinder, in which a piston is guided for displacement, to which a piston rod is secured, which is guided out of the exterior cylinder. The exterior cylinder has a thin hard external nitrided layer and a considerably softer core layer enclosing the inside wall of the exterior cylinder.

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