Heated windshield wiper blade assembly
First Claim
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1. A reciprocating heated windshield wiper blade assembly for a vehicle having a windshield comprising;
- a flexible blade, a blade retainer secured to said blade, a blade holder, tensioning elements interconnecting the retainer to the holder, and a drive arm interconnecting the blade to a wiper motor for arcuately reciprocating the flexible blade assembly over the windshield of the vehicle,an electric heating element embedded in said flexible blade, said heating element comprising a relatively thin, flexible plastic strip molded within the flexible blade, a metallic resistance heating element etched into said plastic strip, electric circuitry connecting said heating element to a source of electrical power, a switch for selectively energizing said circuitry, and control means for controlling the flow of electrical current to said heating element, said control means comprising a normally closed pulse timer circuit for alternately opening and closing the flow of current to the heating element in response to the passage of a predetermined period of time when the electric circuitry to the heating element is in a closed or open condition whereby when said heating element is energized the wiper blade will be heated.
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Abstract
A heated wiper blade assembly for vehicles comprises an electric resistance heating element molded within the conventional wiper blade. A normally closed timer or temperature sensor controls operation of the heating element. The heating element heats the wiper blade and prevents ice build-up on the blade during snow or sleet precipitation.
21 Citations
1 Claim
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1. A reciprocating heated windshield wiper blade assembly for a vehicle having a windshield comprising;
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a flexible blade, a blade retainer secured to said blade, a blade holder, tensioning elements interconnecting the retainer to the holder, and a drive arm interconnecting the blade to a wiper motor for arcuately reciprocating the flexible blade assembly over the windshield of the vehicle, an electric heating element embedded in said flexible blade, said heating element comprising a relatively thin, flexible plastic strip molded within the flexible blade, a metallic resistance heating element etched into said plastic strip, electric circuitry connecting said heating element to a source of electrical power, a switch for selectively energizing said circuitry, and control means for controlling the flow of electrical current to said heating element, said control means comprising a normally closed pulse timer circuit for alternately opening and closing the flow of current to the heating element in response to the passage of a predetermined period of time when the electric circuitry to the heating element is in a closed or open condition whereby when said heating element is energized the wiper blade will be heated.
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Specification
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Current AssigneeBoyd P. Ehret, David B. Ehret
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Original AssigneeBoyd P. Ehret, David B. Ehret
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InventorsEhret, David B., Ehret, Boyd P.
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Primary Examiner(s)Graham, Gary K.
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Application NumberUS08/808,384Time in Patent Office620 DaysField of Search15/250.06, 15/250.07, 15/250.08, 15/250.09, 15/250.05, 15/250.48, 15/250.301, 219/202, 219/203, 219/492, 219/493, 219/482, 219/490US Class Current15/250.06CPC Class CodesB60S 1/3805 electricallyB60S 2001/3836 characterised by cross-sect...
