Method of manufacturing gas springs
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United States of America Patent
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Jul 30, 2002
Grant Date -
N/A
app pub date -
Apr 2, 2001
filing date -
Aug 21, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The method includes making a fluid communication channel (44), which has a selectively variable cross-sectional area profile, in the inner face of a gas spring cylinder (32) so as to permit fluid communication at different selective rates bypassing around or across the piston assembly (68) of the gas spring (52)as the piston assembly (68) moves within the cylinder (32). Preferably the cross-sectional area profile of the fluid communication channel (44) is initially substantially the same throughout the length of the channel(44) and is thereafter selectively changed in certain portions of the channel (44) so as to restrict and in some instances block gas or fluid flow through the fluid communication channel (44).
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