Patent US3171997A successfully refreshed from Google Patents.
US3171997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct current small motor
Assignee: Diehl Verwaltungs Stiftung
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Filing: 1960-05-19
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Granted: 1965-03-02
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Expires: 1980-05-19
Abstract
No abstract record available.
Inventors
- 👤 Hammer Heinz Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:25
CPC Classifications
H; H02; H02K; H02K13/00; H02K13/10; H01; H01R; H01R39/00; H01R39/02; H01R39/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A UNIDIRECTIONAL DIRECT CURRENT SMASLL MOTOR WITH A COMMUTATOR, TWO RESILIENT CONTACT BLADES CONTACTING THE COMMUTATOR AT SPACED POINTS THEREABOUT, STATIONARY SUPPORTING MEANS, ONE END OF EACH SAID CONTACT BLADE BEING CLAMPED IN SAID SUPPORTING MEANS, MEANS FOR LIFTING ONE OF SAID BLADES OFF THE COMMUTATOR TO INTERRUPT OPERATION OF SAID MOTOR, SAID COMMUTATOR BEING PROVIDED WITH A PLURALITY OF CIRCUMFERENTIALLY DISTRIBUTED CONTACT PIECES OF WHICH AT LEAST THAT SURFACE WHICH IS ENGAGED BY THE SAID BLADES CONSISTS OF A SLIVER-PALLADIUM-CADMIUM ALLOY, THE ONE OF SAID BLADES WHICH IS POSITIVE AND WHICH IS THERE-
Claim 2
Dependent Claim
94 words
A UNIDIRECTIONAL DIRECT CURRENT SMASLL MOTOR WITH A COMMUTATOR, TWO RESILIENT CONTACT BLADES CONTACTING THE COMMUTATOR AT SPACED POINTS THEREABOUT, STATIONARY SUPPORTING MEANS, ONE END OF EACH SAID CONTACT BLADE BEING CLAMPED IN SAID SUPPORTING MEANS, MEANS FOR LIFTING ONE OF SAID BLADES OFF THE COMMUTATOR TO INTERRUPT OPERATION OF SAID MOTOR, SAID COMMUTATOR BEING PROVIDED WITH A PLURALITY OF CIRCUMFERENTIALLY DISTRIBUTED CONTACT PIECES OF WHICH AT LEAST THAT SURFACE WHICH IS ENGAGED BY THE SAID BLADES CONSISTS OF A SLIVER-PALLADIUM-CADMIUM ALLOY, THE ONE OF SAID BLADES WHICH IS POSITIVE AND WHICH IS THERE-
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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) | 1968-03-01 | 1968-08-31 | 1969-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-01 | 1972-08-31 | 1973-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-01 | 1976-08-31 | 1977-03-02 | $7700.00 | Window Closed / Lapsed |