Patent · US Active

Adjustable-length gas spring

US7540362B2 · kind B2 · utility

2Cited by

5References

9Claims

0Family size

Assignee

SUSPA GMBH · DE

Inventors

Holger Knaust · Neuenburg am Rhein, DE
Michael Schmidbauer · Hahnbach, DE

Key dates

Filing date	Jun 26, 2006
Grant date	Jun 2, 2009
Priority date	—
Expiry date	Aug 15, 2027

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16F9/0272
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

An adjustable length gas spring comprises a casing and a piston which is disposed for displacement in the casing and joined to a piston rod. An externally operable adjusting valve is formed in the piston. Further, the piston is provided with a traction valve, which, upon application of tractive force from outside, cancels any blockage of the piston.

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