Machine element or mechanism – Mechanical movements – Rotary to alternating rotary
Patent
1974-09-13
1976-03-09
Camby, John J.
Machine element or mechanism
Mechanical movements
Rotary to alternating rotary
74 75, 1525017, F16H 2140, A47L 100, B60S 102
Patent
active
039423859
ABSTRACT:
An actuating mechanism for imparting oscillatory motion to an output shaft journalled for pivotal movement about a fixed pivot axis. The actuating mechanism is adapted to be driven by a reversible motor means and comprises a power shaft carrying a drive worm, a worm gear in mesh with the drive worm and coupled to a drive shaft, and an articulated crank and link means coupling the drive shaft to the output shaft for translating rotation of the drive shaft into oscillation of the output shaft through an arc of predetermined angular size.
The drive shaft is journalled in a slide means. A guide means supports the slide means for shiftable movement in a direction parallel to the longitudinal axis of the power shaft between first and second positions, the slide means being shiftable from one position to the other upon the direction of rotation of the motor being reversed. The movement of the slide means causes corresponding movement of the drive shaft journalled therein toward or away from the fixed pivot axis of the output shaft thereby to shift the angular position of the arc through which the output shaft is oscillatable.
The actuating mechanism has particular utility in a vehicle windshield wiper system in which a wiper blade is oscillated through a wipe pattern and then shifted to a displaced position for parking in an inoperative position.
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Camby John J.
Ford Motor Company
Roethel John J.
Yuen Henry C.
Zerschling Keith L.
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