Pneumatic motor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Aug 13, 2002
Grant Date -
N/A
app pub date -
Oct 25, 2000
filing date -
Oct 25, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A double acting pneumatic motor having a cylinder, a piston within the cylinder that divides the cylinder into two cavities that vary in volume with movement of the piston, a source of fluid under pressure, and a valve assembly for alternately directing fluid to one cavity while exhausting the other cavity to make the piston reciprocate. The valve assembly resides in a housing, and includes a cylindrical spool that moves axially between two positions with at least one enlarged diameter portion between smaller diameter portions at each end. The pneumatic motor may be provided with a cover for attenuating sound from the exhaust.
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