One-piece, open-end wrenching head with roughened jaws
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United States of America Patent
Stats
-
Sep 22, 1992
Issued Date -
N/A
app pub date -
Nov 27, 1991
filing date -
Oct 16, 1989
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The open-end wrenching head includes two jaws and a throat interconnecting the jaws. The jaws include planar jaw driving surfaces each with a roughened region thereon adjacent to the throat and an unroughened region adjacent to the outermost end of the jaw driving surface, each of the roughened and unroughened regions being constructed and arranged to engage a portion of a selected side of a fastener. The throat may include either an arcuate surface or two planar throat driving surfaces. Each of the roughened regions has a coefficient of friction substantially greater than that of the unroughened regions and may be formed by deposition of an abrasive material by any of a number of processes or by deformation of the jaw driving surface by any of a number of processes.
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