Wrench having a greater driving strength
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 22, 1994
Grant Date -
N/A
app pub date -
Apr 23, 1993
filing date -
Apr 23, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A wrench for driving an object includes a circular engaging surface formed in a head portion, a number of ribs are formed in the circular engaging surface and extended radially inwards of the engaging surface, and the object includes a number of depressions for receiving the ribs such that the contact area between the ribs and the depressions are increased when the object is driven by the wrench.
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