Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1994-06-21
1995-11-28
Graham, Gary K.
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
15250351, B60S 132, B60S 144
Patent
active
054695953
ABSTRACT:
A windshield wiper assembly produces an automatic lifting and snapping action of an oscillating wiper arm to slap a wiper blade against a windshield of an automobile when an initiator arm is in an engagement position. The wiper arm is pivoted on a wiper base when a bell crank, which is connected to the wiper base, engages the initiator arm. When the wiper base oscillates in a first direction across the initiator arm, the bell crank pushes a lever, which in turn raises the tension vector from a spring connected between first and second tension points in the wiper arm above the pivot point and the wiper arm is lifted from the windshield. When the wiper base oscillates in an opposite direction over the initiator arm, the bell crank lowers the lever, which in turn lowers the tension vector below the pivotal connection and slaps the wiper arm back toward the windshield. The initiator arm may be continuously placed into the engagement position to cause a repeating slapping action, or it may be controllably swung into the engagement position at predetermined intervals to provide an occasional slapping action of the wiper against the windshield.
REFERENCES:
patent: 2187876 (1940-01-01), Ericson
patent: 2306980 (1942-12-01), Roberts
patent: 2337879 (1943-12-01), Folberth et al.
patent: 2717408 (1955-09-01), Le Page
patent: 2784438 (1957-03-01), Petersen
patent: 4370774 (1983-02-01), Bienert et al.
patent: 4439886 (1984-04-01), Yagasaki et al.
patent: 4736484 (1988-04-01), Bauer et al.
patent: 4907315 (1990-03-01), Arai et al.
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