US3231772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brush and spring assembly
Assignee: RELIABLE SPRING AND WIRE FORMS CO
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Filing: 1963-01-14
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Granted: 1966-01-25
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Expires: 1983-01-14
Abstract
No abstract record available.
Inventors
- 👤 Albert G Polenschat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:37
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/14; H02K5/143; H02K5/148
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A SPRING DEVICE FOR EXERTING A SUBSTANTIALLY CONSTANT FORCE ON A BRUSH FOR AN ELECTRIC MOTOR COMPRISING, IN COMBINATION, A MOUNTING DEVICE, A BRUSH HOLDER MOUNTED ON SAID MOUNTING DEVICE AND ADAPTED TO HOLD A BRUSH IN POSITION ADJACENT THE COMMUTATOR OF THE ELECTRIC MOTOR, A COLIED CLOCK-TYPE SPRING HAVING A FREE END AND A SECURED END, CONNECTING MEANS SECURING SAID SECURED END TO SAID MOUNTING DEVICE, SAID SPRING HAVING ITS FREE END AGAINST THE SAID BRUSH WITHIN SAID BRUSH HOLDER TO URGE SAID BRUSH AGAINST SAID COMMUTATOR, SAID CONNECTING MEANS BEING OFFSET A SUBSTANTIAL AMOUNT FROM THE CENTER OF SAID COIL TOWARD THE FREE END OF SAID SPRING, THE AMOUNT OF SAID OFFSET BEING SUCH AS TO LOCATE SAID CONNECTING MEANS AT LEAST ABOUT HALF WAY BETWEEN THE CENTER OF SAID COILED SPRING AND THE OUTSIDE THEREOF.
Claim 2
Dependent Claim
138 words
A SPRING DEVICE FOR EXERTING A SUBSTANTIALLY CONSTANT FORCE ON A BRUSH FOR AN ELECTRIC MOTOR COMPRISING, IN COMBINATION, A MOUNTING DEVICE, A BRUSH HOLDER MOUNTED ON SAID MOUNTING DEVICE AND ADAPTED TO HOLD A BRUSH IN POSITION ADJACENT THE COMMUTATOR OF THE ELECTRIC MOTOR, A COLIED CLOCK-TYPE SPRING HAVING A FREE END AND A SECURED END, CONNECTING MEANS SECURING SAID SECURED END TO SAID MOUNTING DEVICE, SAID SPRING HAVING ITS FREE END AGAINST THE SAID BRUSH WITHIN SAID BRUSH HOLDER TO URGE SAID BRUSH AGAINST SAID COMMUTATOR, SAID CONNECTING MEANS BEING OFFSET A SUBSTANTIAL AMOUNT FROM THE CENTER OF SAID COIL TOWARD THE FREE END OF SAID SPRING, THE AMOUNT OF SAID OFFSET BEING SUCH AS TO LOCATE SAID CONNECTING MEANS AT LEAST ABOUT HALF WAY BETWEEN THE CENTER OF SAID COILED SPRING AND THE OUTSIDE THEREOF.
References Cited (Backward Citations)
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Cited
US2622700A
Cited
US2630316A
Cited
US2602100A
Cited
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Cited
US2833027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |