Open end wrench for turning normal and worn-out bolts and nuts o

Details Open end wrench for turning normal and worn-out bolts and nuts o Open end wrench for turning normal and worn-out bolts and nuts o

1998-01-23

2000-11-14

Scherbel, David A.

Tools

Wrench, screwdriver, or driver therefor

Rigid jaws

81186, B25B 1302

Patent

active

061454141

ABSTRACT:
An open end wrench having a mouth defined between two jaws and a nest. A longitudinal series of transversely extended flat teeth are provided at each of the two jaws within the mouth, so that the longitudinal series of transversely extended flat teeth includes a first tooth remote from the nest, a third tooth adjacent to the nest, and a second tooth spaced between the first tooth and the third tooth by a respective transverse groove. The first tooth has a front side remote from the second tooth and a rear side adjacent to the second tooth. The longitudinal lengths of the first tooth, the second tooth and the third tooth have a ratio of 4:3:3:. The longitudinal length of the longitudinal series of transversely extended flat teeth is equal to 0.39 of the width of the mouth, and 0.77 of the distance from the front side of the first tooth to the nest.

REFERENCES:
patent: 834807 (1906-10-01), Hoffmann
patent: 5148726 (1992-09-01), Huebschen et al.
patent: 5551322 (1996-09-01), Mikic et al.

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