Tools – Wrench – screwdriver – or driver therefor – Rigid jaws
Reexamination Certificate
2007-04-24
2007-04-24
Thomas, David B. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Rigid jaws
C081S058000, C192S046000
Reexamination Certificate
active
11174454
ABSTRACT:
A tool comprises a first handle and a second handle, each handle extending from a gripping end portion to a working end portion, the first handle having first screw threads disposed circumferentially about an inner portion of a first through-hole at the working end portion thereof, the second handle having second screw threads disposed circumferentially about an inner portion of a second through-hole at the working end portion thereof, the first and second respective through-holes being disposed concentrically about a common axis of the working end portions. First and second screw locks preferably are disposed concentrically with the first and second respective through-holes, the first screw lock having a plurality of locking/unlocking screw threads for engaging the first screw threads of the first handle, the second screw lock having a plurality of locking/unlocking screw threads for engaging the second screw threads of the second handle. A locking clutch drive, disposed concentrically with the first and second respective through-holes, engages the first screw lock and the second screw lock. The first handle and the second handle are selectively operable at their gripping end portions by a user using a single hand to activate the first and second screw locks to lock the locking clutch drive for either clockwise rotation about the common axis, or counter-clockwise rotation about the common axis, or to release the locking clutch drive so that the handles can be rotated together about the common axis either the clockwise or counter-clockwise direction without rotation of the locking clutch drive.
REFERENCES:
patent: 3534836 (1970-10-01), Dane
patent: 5174772 (1992-12-01), Vranish
patent: 5482144 (1996-01-01), Vranish
patent: 5518094 (1996-05-01), Myrick
patent: 5738472 (1998-04-01), Roopnarine et al.
patent: 6082512 (2000-07-01), Marks
patent: 6584874 (2003-07-01), Wade et al.
Geurts Bryan A.
Thomas David B.
United States of America as represented by the Administrator of
LandOfFree
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