Torque wrench
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United States of America Patent
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May 21, 2013
Grant Date -
Jun 30, 2011
app pub date -
Feb 16, 2010
filing date -
Apr 16, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
To make improvements in torque wrenches with a torque limiter that uses a cam mechanism and to provide a torque wrench that realizes more stable operation and is capable of highly precise tightening. In a torque wrench with a torque limiter that uses a cam mechanism, a solid columnar roller member 14 is engaged with a cam part 7 of a cam shaft 8 such that it is rotatably supported by a roller support lever member 12 mounted in a head portion 2 such as to be rotatable around a support shaft 16 and such that it is pressed against the cam part 7 by a spring force transmitting rod 18 biased by a torque setting spring. The roller support lever member 12 is configured such that the distance r2 from the support shaft 16 to a point of application of force of the spring force transmitting rod 18 is longer than the distance r1 from the support shaft 16 to the roller member 14.
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