Crank arm for a windshield wiper drive mechanism

Details Crank arm for a windshield wiper drive mechanism Crank arm for a windshield wiper drive mechanism

B - Operations, Transporting

60

S

15/35

B60S 1/08 (2006.01) B60S 1/16 (2006.01) B60S 1/24 (2006.01)

Patent

CA 1130063

C-3173 CRANK ARM FOR A WINDSHIELD WIPER DRIVE MECHANISM Abstract of the Disclosure: A windshield wiper drive mechanism includes an electric motor having a worm shaft which meshes with a gear assembly which is drivingly connected to a crank arm. A windshield wiper transmission link is also connected to the crank arm. The crank arm has an inner diametral bearing surface which is rotatably supported on a pin secured at one end in cantilever fashion to a housing, and an outer diametral bearing surface which is adapted for rotatable support in a cylin- drical opening in another housing. The outer bearing surface has axially extending recesses in which a lubricant is retained. When high transmission loads are applied to the crank arm, the pin deflects slightly so that the increased bearing loads are supported on the outer bearing surface to prevent further deflection of the pin.

354365

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