Windshield wiper with variable arm pressure

Details Windshield wiper with variable arm pressure Windshield wiper with variable arm pressure

1991-03-29

1992-11-10

Hornsby, Harvey C.

Brushing, scrubbing, and general cleaning

Attachments

Optical-member-attachable cleaner

B60S 132

Patent

active

051612801

ABSTRACT:
A windshield wiper assembly provides variable contact pressure between the wiper blade and the windshield by utilization of a lever arm variably movable within a cam slot as the windshield wiper reciprocates across the windshield. A spring provides a bias force between the wiper arm and the lever arm of the assembly. The spring force acts through a moment arm to urge the wiper blade into contact with the windshield. The magnitude of the moment arm through which the spring bias force acts to urge the wiper blade into contact with the windshield is adjusted in accordance with the position of the wiper blade on the windshield as a result of the predetermined configuration of the cam slot which acts on the lever arm to which one end of the spring is attached. In this manner, the contact pressure between the wiper blade and the windshield is reduced at the extreme ends of the windshield wiper throw so as to reduce the noise typically associated with the windshield wiper reversing direction on the windshield.

REFERENCES:
patent: 3035296 (1962-05-01), Deibel
patent: 4370774 (1983-02-01), Bienert et al.
patent: 4993102 (1991-02-01), Honda et al.
patent: 5056182 (1991-10-01), Fukumoto et al.

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