Patent · US Expired

Adjustable-length gas spring with permanent release mechanism

US4779851A · kind A · utility

7Cited by

5References

9Claims

0Family size

Assignee

Fritz Bauer + Sohne oHG · DE

Inventors

Hans-Peter Bauer · Altdorf, DE
Hans J. Bauer · Altdorf, DE
Ludwig Stadelmann · Altdorf, DE
Herbert Wolf · Wooster, US

Key dates

Filing date	Jan 22, 1987
Grant date	Oct 25, 1988
Priority date	—
Expiry date	Jan 22, 2007

Classification

Technology area (CPC A)Human Necessities
CPC primaryA47C1/03216
WIPO fieldFurniture, games
WIPO sectorOther fields

Abstract

An adjustable-length gas spring has a compressed gas-filled housing in which a piston with a piston rod is sealingly guided. At one end of the housing is provided a valve with a valve pin for connecting or separating two housing chambers, the valve pin being movable into the housing against the force exerted thereon by the gas pressure with the valve in the open position. The pin is movable against such force when the valve is in the closed position. There is also a permanent release mechanism for securing the valve pin when the valve is in the open position. In order to permit a particularly simple operation of the gas spring, the permanent release mechanism is formed by a bi-stable locking mechanism constructed in the manner of a mechanical flip-flop and which is coupled to the valve pin, being operated by the insertion thereof into the housing.

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