Pneumatic vane motor with improved sealing
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United States of America Patent
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Jul 10, 2012
Grant Date -
Apr 15, 2010
app pub date -
Oct 16, 2007
filing date -
Oct 16, 2006
priority date (Note) -
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Abstract
A pneumatic vane motor includes a stator with a cylinder, an inlet connectable to a pressure air source and an outlet connectable to an exhaust passage, a rotor journalled in the stator, and an output shaft. The stator has a front opening forming a clearance seal relative to the output shaft and an annular front cover with at least one elastic annular seal element encircling the output shaft at a distance from the clearance seal, wherein a low pressure chamber is formed between the clearance seal and the seal element or elements and communicates with the exhaust passage.
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