Wiper arm for curved windshield

Details Wiper arm for curved windshield Wiper arm for curved windshield

1987-10-05

1988-12-20

Hornsby, Harvey C.

Brushing, scrubbing, and general cleaning

Attachments

Optical-member-attachable cleaner

1525035, 1525038, A47L 100

Patent

active

047916974

ABSTRACT:
A wiper arm for use with a highly curved windshield is designed so that the wiping pressure in the blade is substantially constant in spite of the deflections up and down to which the arm is subjected. The arm consists of two parts, a channel shaped main body cantilevered from the post of the wiper drive mechanism, and a slider bar that is free at its back end. As the arm deflects, the main body bends, creating a resistance force that adds to the wiping pressure in the blade, while the back end of the slider bar moves relative to the main body of the arm. A tension spring hooked between the back end of the slider bar and the vehicle pulls the arm toward the windshield, also adding to the wiping pressure. However, as the arm deflects up, the spring relaxes, so that the contribution of the spring to wiping pressure decreases concurrently with the contribution of the bending main body of the arm increasing. Therefore, the total wiping pressure remains more nearly constant.

REFERENCES:
patent: 2715239 (1955-08-01), Mintz
patent: 3042953 (1962-07-01), Batley
patent: 4545088 (1985-10-01), Kohler
patent: 4704761 (1987-10-01), South et al.

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