Pneumatic fastener driving tool having air exhaust arrangement
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United States of America Patent
Stats
-
Jul 27, 1999
Grant Date -
N/A
app pub date -
Apr 2, 1998
filing date -
Apr 18, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A compressed air exhaust arrangement in a pneumatic fastener driving tool. An exhaust port is formed in an upper portion of a main body, and a cover member is fixed onto the upper portion. An annular muffler member is disposed between the cover member and an upper surface of the main body to surround the exhaust port. The cover member has a lower surface formed with a plurality of cranked grooves for providing a plurality of air vent passages relative to an upper surface of the muffler member. The air vent passage allows the compressed air from the exhaust port to pass therethrough toward an atmosphere. Before freeze of the muffler member, most of the compressed air discharged through the exhaust port directly passes through the muffler member. After freeze of the muffler member, the compressed air passes through the air vent passage.
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