Gas spring
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Oct 9, 2007
Grant Date -
May 11, 2006
app pub date -
Apr 5, 2004
filing date -
Apr 11, 2003
priority date (Note) -
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status (Latency Note)
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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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