Tools – Wrench – screwdriver – or driver therefor – Pivoted outer jaw
Reexamination Certificate
2011-03-29
2011-03-29
Thomas, David B (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Pivoted outer jaw
C081S090300
Reexamination Certificate
active
07913589
ABSTRACT:
A wrench includes a handle, and a driving unit pivotally mounted on the handle. The handle has an end portion provided with a support surface. The driving unit includes a first jaw having a first end pivotally mounted on the end portion of the handle, and a second jaw having a first end pivotally connected with a second end of the first jaw and a second end that is movable to abut the support surface of the handle and the first end of the first jaw. Thus, the second end of the second jaw abuts the support surface of the handle tightly and closely so that the force applied by a user is transmitted to the wrench directly so as to drive the wrench to operate the workpiece in an energy-saving manner.
REFERENCES:
patent: 334227 (1886-01-01), Hellem
patent: 747612 (1903-12-01), Jones
patent: 1019280 (1912-03-01), Serfoss
patent: 1177620 (1916-04-01), Hardeman
patent: 1764124 (1930-06-01), Smith
patent: 2448221 (1948-08-01), Jones
patent: 2847888 (1958-08-01), Paulson
patent: 3097552 (1963-07-01), Kelley
patent: 5957010 (1999-09-01), Petts
patent: 6286398 (2001-09-01), Huang
patent: 6978701 (2005-12-01), Buchanan
Kamrath Alan
Kamrath & Associates PA
Thomas David B
LandOfFree
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