Gas spring with integrated lead screw drive
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United States of America Patent
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Feb 21, 2012
Grant Date -
Jan 5, 2006
app pub date -
Jul 1, 2004
filing date -
Jul 1, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
An improved gas spring has a drive motor for driving a piston. A piston head has a thread at an outer periphery that is guided along a mating thread in an inner periphery of a cylinder. The piston is caused to rotate relative to the cylinder, and is guided for reciprocating movement. In this manner, a drive motor is incorporated into the gas spring such that the gas spring has both a driven and a manual mode. The inventive gas spring has particular application in attaching a vehicle closure to a vehicle frame.
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