Tools – Wrench – screwdriver – or driver therefor – Pivoted outer jaw
Patent
1981-11-20
1984-12-18
Schmidt, Frederick R.
Tools
Wrench, screwdriver, or driver therefor
Pivoted outer jaw
81 77, 81109, B25B 1328
Patent
active
044884613
ABSTRACT:
A continuously adjustable wrench suitable for use with a range of nut or bolt head sizes and having a handle which is offset or angularly disposed with respect to the wrench head. The wrench provides contact with the nut or bolthead at three spaced, opposing points such that the rotational torque imparted thereto is optimized and the strength required for the wrench head for a given torque is reduced. In one embodiment, the wrench head is pivotally disposed with respect to the handle either about a single pivot or a double pivot to drive a camming contact surface on the handle into contact with a confronting surface of the nut or bolthead. In another embodiment, a contact surface is adjustable longitudinally along the handle to be positioned adjacent the nut or bolthead. In a further embodiment, a wrench head is disposed at each end of the handle, and an adjustment screw is provided on the handle for sliding the handle with respect to the wrench heads for continuously adjusting both wrench heads simultaneously. The wrench heads of this embodiment may be either pivotally or non-pivotally disposed with respect to the handle.
REFERENCES:
patent: 1123462 (1915-01-01), Anderson
patent: 1286926 (1918-12-01), Brightly
patent: 1754717 (1930-04-01), Hughens
patent: 3670604 (1972-06-01), Fromell
patent: 4151763 (1979-05-01), Colvin
Encor Limited
Meislin Debra S.
Schmidt Frederick R.
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