US3411064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable speed windscreen wiper systems using permanent magnet motors
Assignee: ZF International UK Ltd
•
Filing: 1965-10-11
•
Granted: 1968-11-12
•
Expires: 1985-10-11
Abstract
No abstract record available.
Inventors
- 👤 Mellor Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:17
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/08; H02P7/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A WINDSCREEN WIPER MOTOR SYSTEM FOR A ROAD VEHICLE, COMPRISING A PERMANENT MAGNET WINDSCREEN WIPER MOTOR HAVING A COMMUTATOR, A PAIR OF BRUHSES DIAMETRICALLY OPPOSITE ONE ANOTHER AND ENGAGING SAID COMMUTATOR, A THIRD BRUSH ENGAGING SAID COMMUTATOR AND ANGULARLY SPACED FROM SAID PAIR OF BRUSHES, SAID THIRD BRUSH HAVING A CIRCUMFERENTIAL LENGTH WHICH IS SHORTER THAN THE CIRCUMFERENTIAL LENGTH OF SAID PAIR OF BRUSHES, AND SWITCH MEANS OPERABLE SELECTIVELY TO ENERGISE SAID PAIR OF BRUSHES OR ONE OF SAID PAIR OF BRUSHES AND SAID THIRD BRUSH, WHEREBY TO OPERATE THE MOTOR AT DIFFERENTIAL SPEEDS.
Claim 2
Dependent Claim
94 words
A WINDSCREEN WIPER MOTOR SYSTEM FOR A ROAD VEHICLE, COMPRISING A PERMANENT MAGNET WINDSCREEN WIPER MOTOR HAVING A COMMUTATOR, A PAIR OF BRUHSES DIAMETRICALLY OPPOSITE ONE ANOTHER AND ENGAGING SAID COMMUTATOR, A THIRD BRUSH ENGAGING SAID COMMUTATOR AND ANGULARLY SPACED FROM SAID PAIR OF BRUSHES, SAID THIRD BRUSH HAVING A CIRCUMFERENTIAL LENGTH WHICH IS SHORTER THAN THE CIRCUMFERENTIAL LENGTH OF SAID PAIR OF BRUSHES, AND SWITCH MEANS OPERABLE SELECTIVELY TO ENERGISE SAID PAIR OF BRUSHES OR ONE OF SAID PAIR OF BRUSHES AND SAID THIRD BRUSH, WHEREBY TO OPERATE THE MOTOR AT DIFFERENTIAL SPEEDS.
References Cited (Backward Citations)
US2642555A
Cited
US3310722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-12 | 1972-05-13 | 1972-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-12 | 1976-05-13 | 1976-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-12 | 1980-05-13 | 1980-11-12 | $7700.00 | Window Closed / Lapsed |