Compact wrench with three-stage control

Details Compact wrench with three-stage control Compact wrench with three-stage control

2006-08-15

2006-08-15

Wilson, Lee D. (Department: 3723)

Tools

Wrench, screwdriver, or driver therefor

Handle clutched to head

C083S060000, C083S061000

Reexamination Certificate

active

07089830

ABSTRACT:
A wrench includes a handle, a head, a drive member rotatably mounted in the head, two pawls, an elastic element for biasing at least one of the pawls to engage with the drive member, and a pivotable switch. An end of each pawl defines a space. The end of each pawl further includes a protrusion. The spaces of the pawls overlap with each other and the protrusion of each pawl is located in the space of the other pawl. The switch includes an actuating member extending into the overlapped spaces of the pawls and between the protrusions of the pawls. The actuating member of the switch is pivotable to engage with and thus move the protrusion of one of the pawls, disengaging the pawl from the drive member and thereby changing a driving rotation direction and a free rotation direction of the wrench.

REFERENCES:
patent: 5467672 (1995-11-01), Ashby
patent: 6467378 (2002-10-01), Chen
patent: 6539825 (2003-04-01), Lin
patent: 6584875 (2003-07-01), Deng
patent: 6647833 (2003-11-01), Wu
patent: 6964216 (2005-11-01), Chen
patent: 6981434 (2006-01-01), Chen
patent: 6988429 (2006-01-01), Lee et al.
patent: 2004/0083860 (2004-05-01), Arnold et al.
patent: 519023 (2003-01-01), None

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