US Patent: 5,381,710
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| Wrench with Inclined Drive Faces
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Patentee:
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| David R. Baker (exact or similar names) - Fort Worth, TX |
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Patent Dates:
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| Applied: |
Aug. 26, 1993 |
| Granted: |
Jan. 17, 1995 |
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Patent Pictures:
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Stan Schulz
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Description: |
| James E. Bradley - patent attorney
Abstract
A wrench for driving a nut utilizes curved drive faces. The drive faces are convex and protrude inward toward a center line between the jaw portions. Notches are formed on each drive face near the free end. One wrench is adjustable, having a positioner that pushes the nut outward as the movable jaw closes. The positioner maintains the nut in a position in contact with the curved drive surfaces.
CROSS REFERENCE TO RELATED APPLICATION
This application is a division, of application Ser. No. 07/791,024, filed on Nov. 12, 1991, now U.S. Pat. No. 5,239,899, which was a continuation-in-part of application Ser. No. 657,139, filed Feb. 15, 1991, now abandoned, David R. Baker, entitled "Open End Wrench".
The portion of the term of this patent subsequent to August 31, 2010 has been disclaimed.
Example in image #2 is marked:
1220BASD USA Patent 5381710 and
PROTO ANTI-SLIP DESIGN on obverse |
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