Wrench

Details Wrench Wrench

2005-12-27

2005-12-27

Smith, James G. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Pivoted outer jaw

C081S064000, C081S068000, C081S090600, C081S090700, C081S091200

Reexamination Certificate

active

06978701

ABSTRACT:
A wrench has a head portion (10) adapted to engage and apply torque to a workpiece, including a ring member (14) which surrounds the workpiece and has a fixed end (16) and a free end (18) such that, when the ring engages a workpiece and a torque is applied in a predetermined direction (48), the ring closes around the workpiece, increasing the grip between the wrench and the workpiece even if the workpiece is substantially worn, damaged or undersized.

REFERENCES:
patent: 1051562 (1913-01-01), Crolla et al.
patent: 1177620 (1916-04-01), Hardeman
patent: 1464128 (1923-08-01), Coes
patent: 1569148 (1926-01-01), Stainbrook
patent: 1584861 (1926-05-01), Jones
patent: 1666353 (1928-04-01), Schelf
patent: 2426498 (1947-08-01), Franklin
patent: 2436329 (1948-02-01), Stainbrook
patent: 2457223 (1948-12-01), Green
patent: D173568 (1954-11-01), Green
patent: 4967612 (1990-11-01), Sparling
patent: 6431032 (2002-08-01), Kuryan et al.
patent: 1 603 767 (1971-02-01), None
patent: 2554427 (1977-08-01), None
patent: 235434 (1925-06-01), None

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