Pneumatic hand tool exhaust muffler having inner and outer tubes
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 30, 2003
Grant Date -
Aug 16, 2001
app pub date -
Apr 2, 2001
filing date -
Jan 13, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A muffler is provided for use in a pneumatic hand tool having a handle with an exhaust passage. The muffler includes an inner tube, an outer tube, an upper plate, and an end cap. The inner tube is located within the outer tube, with one or more openings being provided in each. The upper plate is located near the inner tube and is provided to close off the exhaust passage so that a majority of the exhaust air is directed into the inner tube during use. The end cap attaches to the handle for closing off the exhaust passage, but for one or more exit openings. During use, exhaust air enters the inner tube, flows out its penguins, flows out the outer tube openings, and flows out the exit opening in the end cap. The tortuous path slows the exhaust air and assists in dampening exhaust noise.
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