Brushing – scrubbing – and general cleaning – Attachments – Optical-member-attachable cleaner
Patent
1989-09-05
1990-11-06
Hornsby, Harvey C.
Brushing, scrubbing, and general cleaning
Attachments
Optical-member-attachable cleaner
219202, 338212, B60S 104, H05B 384
Patent
active
049674374
ABSTRACT:
A heated wiper blade assembly for windshields is provided, in which a plastic blade holder has an upper longitudinal groove for receiving a flat electric heating element enclosed in a ribbon of dielectric. The plastic blade holder also has at its lower portion, a longitudinal slot for receiving a wiper blade therein. A metal cap is positioned over the heating element and crimped around the plastic holder to form a wiper blade subassembly. Such subassembly is then mounted in an enclosing wiper housing such that the upper portion of the blade holder with heating element and metal cap or radiator, are positioned within the housing cavity and the lower portion of the blade holder and the wiper blade, face away from the housing, so that upon application of electricity to the heating element, heat is directed into the housing and also applied to the holder and indirectly to the wiper blade. The holder thus protects the wiper blade from direct application of heat and yet is of low cross-sectional profile and is of sufficient flexibility to follow curved windshield contours without early fatigue problems. The enclosing housing protects the radiator and heating element from wind chill and the radiator directs heat into said housing to warm same. The housing then reflects said heat back down around the holder and wiper blade and thus provides sufficient heat to minimize or prevent snow and ice build-up on housing and blade. In another embodiment of the invention, a flat flexible metal blade replaces the metal cap as radiator, to impart added flexibility to the wiper blade assembly.
REFERENCES:
patent: 3619556 (1971-11-01), Deibel
patent: 3667083 (1972-06-01), Linker
patent: 3852570 (1974-12-01), Tyler
patent: 4194261 (1980-03-01), Parkinson
patent: 4587686 (1986-05-01), Thompson
patent: 4603451 (1986-08-01), VanSickle
Engineering Plastics, Inc.
Hornsby Harvey C.
Machuga Joseph S.
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