Wrench with display device

Details Wrench with display device Wrench with display device

2006-03-21

2006-03-21

Wilson, Lee D. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Slidable jaw adjustments

C081S052000, C081S170000

Reexamination Certificate

active

07013763

ABSTRACT:
A display device is connected to a head of a wrench including a fixed jaw and a movable jaw. A variable electric resistor is connected to a side of the head and electrically connected to the display device. The movable jaw has a contact member which is movably in contact with the variable electric resistor. The changes of the value of electric resistance of the variable electric resistor is transformed into digitals to show the distance between the fixed jaw and the movable jaw, that is, the size of an object clamped between the fixed jaw and the movable jaw.

REFERENCES:
patent: 1562018 (1925-11-01), Warff
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patent: 2722150 (1955-11-01), Green
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patent: 4326436 (1982-04-01), McGraw
patent: 5331868 (1994-07-01), Elmore
patent: 5345636 (1994-09-01), Lamons
patent: 5385071 (1995-01-01), Her
patent: 5548903 (1996-08-01), Johnson et al.
patent: 5697166 (1997-12-01), Hommel
patent: 6508012 (2003-01-01), Wells, Jr.

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