US3657618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Windshield washer and wiper
Assignee: Denso Corp
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Filing: 1969-07-31
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Granted: 1972-04-18
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Expires: 1989-07-31
Abstract
Abstract A windshield washer and wiper system inducing a washer motor circuit and a wiper motor circuit both connected in parallel with a source of power. The system comprises a washer and wiper interlocking control circuit having a heating wire connected in parallel with a washer motor and a thermal switch provided with the wiper motor and adapted to be opened and closed by said heating wire. A switch means is also connected in series with the parallel circuit of said heating wire and said washer motor for controlling the starting and stopping of said washer and wiper interlocking device, and may incorporate a thermal switch utilizing a transition between a stress-deformed state and a self-returned state of a snap strip provided with a tension wire which expands or contracts with the application of heat.
Inventors
- 👤 Takaaki Ori
- 👤 Keitaro Kanada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:10
CPC Classifications
B; B60; B60S; B60S1/00; B60S1/02; B60S1/46; B60S1/48; B60S1/481; B60S1/482; Y; Y10; Y10S; Y10S318/00; Y10S318/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
152 words
A windshield wiper and washer system comprising: a wiper motor and a washer motor, a thermal device comprising a heater wire and a normally open thermal switch which is closed by the heating of said heater wire, said heater wire and said washer motor being connected in parallel and adapted for electrical connection to one terminal of a power source, said wiper motor and said normally open thermal switch being connected in series and also adapted for electrical connection to one terminal of the power source, a second thermal device comprising a second heater wire and a second normally open thermal switch which is closed by the heating of said second heater wire, and a manually operated washer switch, said second heater wire and said washer switch being connected in series with said washer motor, said second thermal switch being connected in parallel with said second heater wire and said washer switch.
Claim 2
Dependent Claim
152 words
A windshield wiper and washer system comprising: a wiper motor and a washer motor, a thermal device comprising a heater wire and a normally open thermal switch which is closed by the heating of said heater wire, said heater wire and said washer motor being connected in parallel and adapted for electrical connection to one terminal of a power source, said wiper motor and said normally open thermal switch being connected in series and also adapted for electrical connection to one terminal of the power source, a second thermal device comprising a second heater wire and a second normally open thermal switch which is closed by the heating of said second heater wire, and a manually operated washer switch, said second heater wire and said washer switch being connected in series with said washer motor, said second thermal switch being connected in parallel with said second heater wire and said washer switch.
Claim 3
Dependent Claim
186 words
A windshield wiper and washer system comprising: a wiper motor and a washer motor, a thermal device comprising a heater wire and a normally open thermal switch which is closed by the heating of said heater wire, said heater wire and said washer motor being connected in parallel and adapted for electrical connection to one terminal of a power source, said wiper motor and said normally open thermal switch being connected in series and also adapted for electrical connection to one terminal of the power source, a second thermal device comprising a second heater wire and a second normally open thermal switch which is closed by the heating of said second heater wire, and a washer switch comprising a first normally open manual switch and a second manual switch which is closable when said first manual switch is at its closing state, said second heater wire and said first manual switch being connected in series with said washer motor, said second thermal switch and said second manual switch being connected in parallel to a series circuit of said second heater wire and said first manual switch.
Claim 4
Dependent Claim
186 words
A windshield wiper and washer system comprising: a wiper motor and a washer motor, a thermal device comprising a heater wire and a normally open thermal switch which is closed by the heating of said heater wire, said heater wire and said washer motor being connected in parallel and adapted for electrical connection to one terminal of a power source, said wiper motor and said normally open thermal switch being connected in series and also adapted for electrical connection to one terminal of the power source, a second thermal device comprising a second heater wire and a second normally open thermal switch which is closed by the heating of said second heater wire, and a washer switch comprising a first normally open manual switch and a second manual switch which is closable when said first manual switch is at its closing state, said second heater wire and said first manual switch being connected in series with said washer motor, said second thermal switch and said second manual switch being connected in parallel to a series circuit of said second heater wire and said first manual switch.
Claim 5
Dependent Claim
293 words
A windshield wiper and washer system comprising: a wiper motor and a washer motor, a thermal device comprising a heater wire and a normally open thermal switch which is closed by the heating of said heater wire, said heater wire and said washer motor being connected in parallel and adapted for electrical connection to one terminal of a power source, said wiper motor and said normally open thermal switch being connected in series and also adapted for electrical connection to one terminal of the power source, a manually operated washer switch, a manually operated wiper switch comprising a first manual wiper switch contact and a second manual wiper switch contact which are alternatively closable, and a wiper blade limiting switch comprising first and second limiting switch contacts which are respectively closed and opened when the wiper blade is located at a predetermined stop position, said first mentioned thermal device being further provided with a normally closed thermal switch contact which is opened by the heating of said first-mentioned heater wire, said washer switch being connected to said washer motor and adapted for connection to one terminal of the power source, said first-mentioned normally open thermal switch being connected to said wiper motor and adapted for connection to one terminal of said power source through said second manual wiper switch contact, said first manual wiper switch being connected to said wiper motor and adapted for connection to one terminal of said power source, and said normally closed thermal switch contact being connected in parallel to said first-mentioned normally open thermal switch through said second limiting switch contact and also being connected in parallel to the series circuit of said wiper motor and said second manual wiper switch contact through said first limiting switch contact.
Claim 6
Dependent Claim
293 words
A windshield wiper and washer system comprising: a wiper motor and a washer motor, a thermal device comprising a heater wire and a normally open thermal switch which is closed by the heating of said heater wire, said heater wire and said washer motor being connected in parallel and adapted for electrical connection to one terminal of a power source, said wiper motor and said normally open thermal switch being connected in series and also adapted for electrical connection to one terminal of the power source, a manually operated washer switch, a manually operated wiper switch comprising a first manual wiper switch contact and a second manual wiper switch contact which are alternatively closable, and a wiper blade limiting switch comprising first and second limiting switch contacts which are respectively closed and opened when the wiper blade is located at a predetermined stop position, said first mentioned thermal device being further provided with a normally closed thermal switch contact which is opened by the heating of said first-mentioned heater wire, said washer switch being connected to said washer motor and adapted for connection to one terminal of the power source, said first-mentioned normally open thermal switch being connected to said wiper motor and adapted for connection to one terminal of said power source through said second manual wiper switch contact, said first manual wiper switch being connected to said wiper motor and adapted for connection to one terminal of said power source, and said normally closed thermal switch contact being connected in parallel to said first-mentioned normally open thermal switch through said second limiting switch contact and also being connected in parallel to the series circuit of said wiper motor and said second manual wiper switch contact through said first limiting switch contact.
Claim 7
Dependent Claim
87 words
A windshield wiper and washer system as in claim 3 further comprising: a second thermal device comprising a second heater wire and a second normally open thermal switch which is closed by the heating of said second heater wire, said second heater wire and said washer switch being connected in series to said washer motor and adapted for connection to one terminal of said power source, said second thermal switch being connected in parallel to the series circuit of said second heater wire and said washer switch.
Claim 8
Dependent Claim
52 words
A windshield wiper and washer system as in claim 4, wherein: said first-mentioned thermal device is provided with a relay coil which is energized by the heating of said first-mentioned heater wire, said first-mentioned thermal switch and said normally closed thermal switch contact being actuated by the energizing of said relay coil.
Claim 9
Dependent Claim
51 words
A windshield wiper and washer system as in claim 3, wherein: said first-mentioned thermal Device is provided with a relay coil which is energized by the heating of said first-mentioned heater wire, said first-mentioned thermal switch and normally closed thermal switch contact being actuated by the energizing of said relay coil.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |