Gas spring

Details Gas spring Gas spring

2007-10-09

2007-10-09

Torres, Melanie (Department: 3683)

Spring devices

Fluid

Expansible-contractible chamber device

C267S064110

Reexamination Certificate

active

10536985

ABSTRACT:
A gas spring for a pressing tool. A cylindrical chamber is divided by a piston into a first space and a second space. The piston is attached to a piston rod, which is axially moveable in the cylindrical chamber. The gas spring is designed with an opposing force to counteract a movement that is produced by forces acting axially on the piston rod in that the first space and the second space are pressurized with a gas. Passages connect the first space and the second space and permit a flow of gas between the first space and the second space. The passages occupy an area that is greater than 5% of the area of the piston in order to reduce the amount of heat generated in the gas spring. The area of the piston is the difference between the cross-sectional areas of the cylindrical chamber and the piston rod.

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patent: WO 02079664 (2002-10-01), None

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