Pneumatic ratchet drive wrench
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United States of America Patent
Stats
-
Jun 17, 2003
Grant Date -
Feb 6, 2003
app pub date -
Jul 19, 2001
filing date -
Jul 19, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pneumatic ratchet drive wrench of the present invention includes a pair of single springs that each bias a corresponding pawl into engagement with an output member and inhibit counter-rotation of the output member opposite the corresponding pawl. The pawl and spring construction allows the wrench head to be smaller than conventional pneumatic ratchet drive wrenches, providing better wrench access into small spaces. The spring is inexpensively formed as one piece of spring wire having independent spring coils for biasing the pawl and inhibiting counter-rotation of the output member.
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