Open-end wrench for turning normal and worn-out bolts and nuts of different specifications
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United States of America Patent
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-
Sep 3, 2002
Grant Date -
Oct 11, 2001
app pub date -
Jun 14, 2001
filing date -
Feb 11, 1998
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An open-end wrench is provided with a mouth between two jaws and a nest interconnecting the two jaws, a first convex surface portion is provided on the first jaw driving surface; and a first transverse tooth, a second transverse tooth and a second convex surface portion is provided on the second jaw driving surface. The first transverse tooth, the second transverse tooth and the second convex surface portion of the second jaw are respectively arranged at predetermined distances from the first convex surface portion of the first jaw driving surface. Further, the distance between the first transverse tooth and the second transverse tooth is 3/25 of the distance between the first convex surface portion of the first jaw driving surface and the first transverse tooth. This structural shaped and dimensional open-end wrench structural arrangement represents an improvement in grasping and turning new-type bolts and nuts as well as worn-out bolts and nuts.
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