Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1990-06-29
1992-12-08
Hornsby, Harvey C.
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
74 70, 74 75, 74600, B60S 122, B60S 124
Patent
active
051685949
ABSTRACT:
Herein disclosed is a retractable wiper device which comprises: a first crank connected for forward and backward rotations to the reduction output shaft of a motor; and a second crank rotatably supported on the first crank such that it is kept in association at a predetermined bent angle with the first crank, while the first crank is being rotated forward, and in general association with the first crank while the first crank is being rotated backward. When in the forward rotation of the first crank, a stopper is always pushed to keep its engagement with the first crank thereby maintaining the aforementioned predetermined bent angle by two overlapped cams which are associated with each other at a predetermined play angle. When in the backward rotation of the first crank, on the other hand, the push of the stopper by the two cams is released in the vicinity of the top turn position of a wiper blade, and the portion of the stopper in the vicinity of the pushed portion by the cams is relieved in the forward direction of the first crank. As a result, the first and second cranks are generally linear in the vicinity of the top turn position of the wiper blade.
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Asmo Co. Ltd.
Graham Gary K.
Hornsby Harvey C.
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