Method of retaining an air suspension
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Aug 12, 2003
Grant Date -
N/A
app pub date -
Mar 14, 2000
filing date -
Mar 14, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of retaining a suspension system includes creating a negative pressure within an air spring such that a longitudinal member is retained in a substantially fixed position relative to a chassis component when the longitudinal member is placed in an unloaded condition. When there is no pressure in the air spring, the air cell is deflated and the suspension is mechanically bottomed out. By further introducing a negative pressure into the air cell with the gas feed, a partial vacuum is formed and the air cell collapses in upon itself. The collapsed air cell grips the piston thereby immobilizing the air spring. Accordingly, when the vehicle is lifted and the air suspension becomes unloaded, the longitudinal member is maintained relative to the chassis component by the immobilized air spring to thereby prevent the air cell from being inverted and damaged.
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