Tools – Wrench – screwdriver – or driver therefor – Handle clutched to head
Reexamination Certificate
2006-09-26
2006-09-26
Wilson, Lee. D. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Handle clutched to head
C081S060000, C081S058100
Reexamination Certificate
active
07111527
ABSTRACT:
There is disclosed a selective one-way screwdriver and, more particularly, a selective one-way screwdriver that includes a long handle and can easily be operated. It includes an elongated handle formed with at least one head formed at an end. The head defines a space for receiving an annular gear formed with a toothed wheel portion on the external side. The annular gear includes a recess in an end in order to receive a bit. The head further defines a cavity near the handle and a channel between the cavity and the space. A switch is put in the cavity. In the channel are put two pawls one of which can selectively be engaged with the toothed wheel portion of the annular gear under the control of the switch. Thus, the handle can drive the annular gear in selective one of two directions. The length of the handle is perpendicular to the axis of the bit so that a user can easily use a small force in order to a large torque through the selective one-way screwdriver.
REFERENCES:
patent: 4602534 (1986-07-01), Moetteli
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patent: 5957009 (1999-09-01), McCann
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patent: 2003/0121371 (2003-07-01), Chiu
patent: 2003/0154826 (2003-08-01), Lee
patent: 2004/0093995 (2004-05-01), Hu
Baxley Charles E.
Grant Alvin J
Wilson Lee. D.
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