Tools – Wrench – screwdriver – or driver therefor – Rigid jaws
Patent
1997-05-15
1999-07-20
Meislin, D. S.
Tools
Wrench, screwdriver, or driver therefor
Rigid jaws
811211, 81125, 81 34, B25B 1306
Patent
active
059243422
ABSTRACT:
An oil filter wrench for easily unscrew an oil filter from a vehicle or machinery includes a hollow wrench body which has a receiving opening provided at a top end thereof, an inner round base wall provided above a bottom end thereof, and a supporting base provided at the bottom end thereof, so as to define an interior chamber between the top end and the bottom end of the wrench body for receiving a lower portion of an oil filter therein through the receiving opening. The oil filter wrench further includes a locking device provided on the base wall for interlocking with a circular bottom edge of the oil filter when the oil filter wrench is turned in a unscrewing direction, a holding device mounted on the top end for gripping on a round body of the oil filter so as to ensure the oil filter wrench mounting on the oil filter, and a driving device integrally provided on the supporting base for driving the wrench body to rotate, in order to unlock and unscrew the oil filter by means of the locking device.
REFERENCES:
patent: 2930267 (1960-03-01), Apicelli
patent: 3005367 (1961-10-01), Vose
patent: 3853026 (1974-12-01), Rhodes
patent: 4266452 (1981-05-01), Crist
patent: 4865727 (1989-09-01), Krauss
patent: 5271299 (1993-12-01), Wadsworth
Chan Raymond Y.
Meislin D. S.
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