Water pump pliers with single-hand control

Details Water pump pliers with single-hand control Water pump pliers with single-hand control

2005-05-24

2005-05-24

Smith, James G. (Department: 3723)

Tools

Tool jaw

Adjustable relationship between jaw

C081S357000, C081S417000

Reexamination Certificate

active

06895840

ABSTRACT:
Water pump pliers consisting of two pincer parts crossing themselves in a connecting region, each consisting of a handle portion and a jaw wherein said pincer parts are movably connected in said connecting region in such a way that said first pincer can be displaced relative to the second pincer to adjust a jaw opening-width on the one hand, and that the pincer parts with jaws can reciprocally pivot on the other hand. A blocking means is provided in such a manner that further shifting of the first pincer part is blocked when the jaws stop against a workpiece to be gripped. A spring element is installed between the pincer parts in such a way that a releasing force from the spring, operating in the opening direction of the jaws, acts upon the pincer parts. The spring element is designed and connected with the handle portions of the two pincer parts in such a way that the spring element, in addition to generating the releasing force, also acts upon the first pincer part with a torque directed around a spring fastening point in such a way that the jaws automatically move into a fully opened opening width following a manual release.

REFERENCES:
patent: 3005368 (1961-10-01), Johnson
patent: 3521510 (1970-07-01), Angquist
patent: 3675359 (1972-07-01), Ohno
patent: 4074597 (1978-02-01), Jansson
patent: 4635510 (1987-01-01), Box
patent: 4651598 (1987-03-01), Warheit
patent: 4893530 (1990-01-01), Warheit
patent: 5660089 (1997-08-01), Chow
patent: 5850768 (1998-12-01), Chow
patent: 5887495 (1999-03-01), Kao
patent: 6000303 (1999-12-01), Chang
patent: 6202518 (2001-03-01), Moffitt, Jr. et al.
patent: 6502482 (2003-01-01), Putsch et al.
patent: 20 31 661 (1971-01-01), None
patent: 298 06 998 (1998-08-01), None
patent: 1 265 295 (1972-01-01), None
patent: WO 0013856 (2000-03-01), None

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