Patent US3392318A successfully refreshed from Google Patents.
US3392318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct current commutation system for brushless electrical motors
Assignee: Motors Liquidation Co
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Filing: 1965-10-21
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Granted: 1968-07-09
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Expires: 1985-10-21
Abstract
No abstract record available.
Inventors
- 👤 Gerald O Huntzinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:55
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/5152; H02M7/5155
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
192 words
IN A DIRECT CURRENT COMMUTATION SYSTEM FOR BRUSHLESS TYPE ELECTRICAL MOTORS COMPRISING AT LEAST A BRIDGE TYPE COMMUTATING SWITCHING CIRCUIT INCLUDING A POSITIVE AND A NEGATIVE POLARITY BANK OF SILICON CONTROLLED RECTIFIER COMMUTATING SWITCHING DEVICES CONNECTED ACROSS THE POSITIVE AND NEGATIVE POLARITY TERMINALS OF A MAIN DIRECT CURRENT POTENTIAL SOURCE AND A PLURALITY OF ELECTRICAL CHARGE STORAGE DEVICES, EACH CORRESPONDING TO ONE OF SAID COMMUTATING SWITCHING DEVICES, FOR STORING AN ELECTRICAL CHARGE, THE COMBINATION WITH SAID ELECTRICAL CHARGE STORAGE DEVICES OF FIRST AND SECOND AUXILIARY CHARGING DIRECT CURRENT POTENTIAL SOURCES EACH HAVING POSITIVE AND NEGATIVE POLARITY TERMINALS, A FIRST CHARGING CIRCUIT MEANS INCLUDING THE SERIES COMBINATIONOF SAID MAIN DIRECT CURRENT POTENTIAL SOURCE AND ON EOF SAID AUXILIARY CHARGING DIRECT CURRENT POTENTIAL SOURCES FOR CHARGING THOSE SAID ELECTRICAL CHARGE STORAGE DEVICES CORRESPONDING TO THE SAID COMMUTATING SWITCHING DEVICES INCLUDED IN SID POSITIVE POLARITY BANK AND SECOND CHARGING CIRCUIT MEANS INCLUDING THE SERIES COMBINATION OF SAID MAIN DIRECT CURRENT POTENTIAL SOURCE AND THE OTHER ONE OF SAID AUXILIARY CHARGING DIRECT CURRENT POTENTIAL SOURCES FOR CHARGING THOSE SAID ELECTRICAL CHARGE STORAGE DEVICES CORRESPONDING TO THE SAID COMMUTATIN SWITCHING DEVICES INCLUDED IN SAID NEGATIVE POLARITY BANK.
Claim 2
Dependent Claim
192 words
IN A DIRECT CURRENT COMMUTATION SYSTEM FOR BRUSHLESS TYPE ELECTRICAL MOTORS COMPRISING AT LEAST A BRIDGE TYPE COMMUTATING SWITCHING CIRCUIT INCLUDING A POSITIVE AND A NEGATIVE POLARITY BANK OF SILICON CONTROLLED RECTIFIER COMMUTATING SWITCHING DEVICES CONNECTED ACROSS THE POSITIVE AND NEGATIVE POLARITY TERMINALS OF A MAIN DIRECT CURRENT POTENTIAL SOURCE AND A PLURALITY OF ELECTRICAL CHARGE STORAGE DEVICES, EACH CORRESPONDING TO ONE OF SAID COMMUTATING SWITCHING DEVICES, FOR STORING AN ELECTRICAL CHARGE, THE COMBINATION WITH SAID ELECTRICAL CHARGE STORAGE DEVICES OF FIRST AND SECOND AUXILIARY CHARGING DIRECT CURRENT POTENTIAL SOURCES EACH HAVING POSITIVE AND NEGATIVE POLARITY TERMINALS, A FIRST CHARGING CIRCUIT MEANS INCLUDING THE SERIES COMBINATIONOF SAID MAIN DIRECT CURRENT POTENTIAL SOURCE AND ON EOF SAID AUXILIARY CHARGING DIRECT CURRENT POTENTIAL SOURCES FOR CHARGING THOSE SAID ELECTRICAL CHARGE STORAGE DEVICES CORRESPONDING TO THE SAID COMMUTATING SWITCHING DEVICES INCLUDED IN SID POSITIVE POLARITY BANK AND SECOND CHARGING CIRCUIT MEANS INCLUDING THE SERIES COMBINATION OF SAID MAIN DIRECT CURRENT POTENTIAL SOURCE AND THE OTHER ONE OF SAID AUXILIARY CHARGING DIRECT CURRENT POTENTIAL SOURCES FOR CHARGING THOSE SAID ELECTRICAL CHARGE STORAGE DEVICES CORRESPONDING TO THE SAID COMMUTATIN SWITCHING DEVICES INCLUDED IN SAID NEGATIVE POLARITY BANK.
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) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |