US3351836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Windshield wiper system with intermittent operation
Assignee: TANN CO
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Filing: 1964-12-01
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Granted: 1967-11-07
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Expires: 1984-12-01
Abstract
No abstract record available.
Inventors
- 👤 Robert W Kearns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:55
CPC Classifications
B; B60; B60S; B60S1/00; B60S1/02; B60S1/46; B60S1/48; B60S1/481; B60S1/482; B60S1/483; Y; Y10; Y10S; Y10S15/00; Y10S15/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
IN A WINDSHIELD CLEANING SYSTEM, AN ELECTRIC WINDSHIELD WIPER MOTOR UNIT FOR DRIVING WIPER MEANS THROUGH REPEATING WIPING CYCLES, AND CONTROL MEANS FOR AUTOMATICALLY DEENERGIZING SAID MOTOR NEAR THE END OF EACH WIPING CYCLE FOR A PREDETERMINED DWELL PERIOD, SAID CONTROL MEANS COMPRISING TRANSISTOR MEANS FOR DE-ENERGIZING THE MOTOR WHEN THE TRANSISTOR MEANS IS TURNED OFF AND ENERGIZING THE MOTOT WHEN THE TRANSISTOR MEANS IS TURNED ON, CAPACITIVE TIMING MEANS TO DETERMINE SAID PREDETERMINED DWELL PERIOD, AND SWITCH MEANS RESPONSIVE TO THE POSITION OF SAID MOTOR UNIT FOR CONDITIONING SAID CAPACITIVE TIMING MEANS TO BIAS SAID TRANSISTOR MEANS OFF FOR SAID PREDETERMINED DWELL PERIOD NEAR TO THE END OF SAID WIPING CYCLES.
Claim 2
Dependent Claim
112 words
IN A WINDSHIELD CLEANING SYSTEM, AN ELECTRIC WINDSHIELD WIPER MOTOR UNIT FOR DRIVING WIPER MEANS THROUGH REPEATING WIPING CYCLES, AND CONTROL MEANS FOR AUTOMATICALLY DEENERGIZING SAID MOTOR NEAR THE END OF EACH WIPING CYCLE FOR A PREDETERMINED DWELL PERIOD, SAID CONTROL MEANS COMPRISING TRANSISTOR MEANS FOR DE-ENERGIZING THE MOTOR WHEN THE TRANSISTOR MEANS IS TURNED OFF AND ENERGIZING THE MOTOT WHEN THE TRANSISTOR MEANS IS TURNED ON, CAPACITIVE TIMING MEANS TO DETERMINE SAID PREDETERMINED DWELL PERIOD, AND SWITCH MEANS RESPONSIVE TO THE POSITION OF SAID MOTOR UNIT FOR CONDITIONING SAID CAPACITIVE TIMING MEANS TO BIAS SAID TRANSISTOR MEANS OFF FOR SAID PREDETERMINED DWELL PERIOD NEAR TO THE END OF SAID WIPING CYCLES.
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) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |