Tools – Wrench – screwdriver – or driver therefor – Rigid jaws
Patent
1998-01-23
2000-01-04
Scherbel, David A.
Tools
Wrench, screwdriver, or driver therefor
Rigid jaws
81186, B25B 1302
Patent
active
060097787
ABSTRACT:
An open end wrench having a mouth defined between two jaws and a nest thereof, and a flat raised portion and a longitudinal series of teeth respectively raised from the two jaws inside the mouth. The longitudinal series of teeth including seven teeth, the center of the raised portion is aligned with the center of the mouth and the middle tooth of the longitudinal series of teeth. The line between the front end of the raised portion and the second tooth of the longitudinal series of teeth is parallel to the line between the rear end of the raised portion and the second to last tooth of the longitudinal series of teeth. The longitudinal length of the longitudinal series of teeth being 0.56 of the width of the mouth, and the distance from the front end of the longitudinal series of teeth to the nest being 0.89 of the width of the mouth.
REFERENCES:
patent: 463137 (1891-11-01), Carpenter
patent: 529707 (1894-11-01), Clay
patent: 720554 (1903-02-01), Benesh
patent: 1479772 (1924-01-01), Cook
patent: 5860339 (1999-01-01), Mikic et al.
Danganan Joni B.
Scherbel David A.
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