Patent US3234420A successfully refreshed from Google Patents.
US3234420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Commutator brush unit
Assignee: Individual
•
Filing: 1961-02-01
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Granted: 1966-02-08
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Expires: 1981-02-01
Abstract
No abstract record available.
Inventors
- 👤 Lindner Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:20
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/38; H01R39/39; H02; H02K; H02K5/00; H02K5/04; H02K5/14; H02K5/143; H02K5/145
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A COMMUTATOR BRUSH UNIT FOR A MINIATURE MOTOR, COMPRISING A PAIR OF SWINGABLE SUPORTS, A SEPARATE ELASTIC STRIP OF WIRE GAUZE SECURED TO EACH OF SAID SUPPORTS, EACH OF SAID STRIPS CONSISTING OF A FLAT ROLL OF THIN HIGHLY CONDUCTIVE WIRE HAVING A PLURALITY OF WINDINGS AND EXTENDING IN THE LONGITUDINAL DIRECTION OF SAID SUPPORT, SAID SUPPORTS HAVING EDGE PORTIONS ENGAGING WITH AND ACTING UPON SAID ROLLS WHEN SAID ROLLS ARE PRESSED BY SAID SUPPORTS AGAINST THE OPPOSITE SIDES OF A COMMUTATOR, WHEREBY SAID ROLLS YIELDABLY ENGAGE LARGE SURFACES OF THE COMMUTATOR, EACH ROLL BEING MERELY SECURED TO ITS SUPPORT AT THE FREE END THEREOF, WHILE THE REMAINDER OF SAID ROLL MERELY RESTS ON ITS SUPPORT IN THE LONGITUDINAL DIRECTION THEREOF, AND MEANS FOR SECURING THE OTHER END OF SAID SUPPORTS IN A FIXED POSITION RELATIVELY TO EACH OTHER.
Claim 2
Dependent Claim
139 words
A COMMUTATOR BRUSH UNIT FOR A MINIATURE MOTOR, COMPRISING A PAIR OF SWINGABLE SUPORTS, A SEPARATE ELASTIC STRIP OF WIRE GAUZE SECURED TO EACH OF SAID SUPPORTS, EACH OF SAID STRIPS CONSISTING OF A FLAT ROLL OF THIN HIGHLY CONDUCTIVE WIRE HAVING A PLURALITY OF WINDINGS AND EXTENDING IN THE LONGITUDINAL DIRECTION OF SAID SUPPORT, SAID SUPPORTS HAVING EDGE PORTIONS ENGAGING WITH AND ACTING UPON SAID ROLLS WHEN SAID ROLLS ARE PRESSED BY SAID SUPPORTS AGAINST THE OPPOSITE SIDES OF A COMMUTATOR, WHEREBY SAID ROLLS YIELDABLY ENGAGE LARGE SURFACES OF THE COMMUTATOR, EACH ROLL BEING MERELY SECURED TO ITS SUPPORT AT THE FREE END THEREOF, WHILE THE REMAINDER OF SAID ROLL MERELY RESTS ON ITS SUPPORT IN THE LONGITUDINAL DIRECTION THEREOF, AND MEANS FOR SECURING THE OTHER END OF SAID SUPPORTS IN A FIXED POSITION RELATIVELY TO EACH OTHER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |