US3313992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Braking circuit
Assignee: ABB Inc USA
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Filing: 1963-10-30
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Granted: 1967-04-11
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Expires: 1983-10-30
Abstract
No abstract record available.
Inventors
- 👤 Donald I Bohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:59
CPC Classifications
H; H02; H02P; H02P3/00; H02P3/06; H02P3/18; H02P3/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A BRAKING CIRCUIT FOR A THREE-PHASE A.-C. INDUCTION MOTOR HAVING A THREE-PHASE STATOR WINDING, EACH OF SAID PHASES OF SAID STATOR WINDING HAVING A RESPECTIVE TERMINAL; SAID BRAKING CIRCUIT INCLUDING A FIRST AND SECOND D.-C. CURRENT INJECTION CIRCUIT; THE TERMINALS OF SAID FIRST D.-C. CURRENT INJECTION CIRCUIT RESPECTIVELY CONNECTED TO A FIRST AND A SECOND OF SAID STATOR WINDING TERMINALS; THE TERMINALS OF SAID SECOND D.-C. CURRENT INJECTION CIRCUIT RESPECTIVELY CONNECTED TO SAID SECOND TERMINAL AND A THIRD OF SAID STATOR WINDING TERMINALS EACH OF SAID D.-C. CURRENT INJECTION CIRCUITS INCLUDING A RESPECTIVE D.-C. VOLTAGE SOURCE, AND A RESPECTIVE SATURABLE REACTOR CONNECTED IN SERIES WITH SAID D.-C. VOLTAGE SOURCE AND THE SAID TERMINALS OF SAID RESPECTIVE D.-C. CURRENT INJECTION CIRCUIT; EACH OF SAID RESPECTIVE D.-C. VOLTAGE SOURCES INCLUDING A RECTIFIER MEANS, AND A COMMON SINGLE PHASE VOLTAGE SOURCE CONNECTED TO EACH OF SAID RECTIFIER MEANS; SAID FIRST AND SECOND D.-C. CURRENT INJECTION CIRCUITS CONDUCTING UNIDIRECTIONAL CURRENT PULSES 60* PHASE DISPLACED FROM ONE ANOTHER.
Claim 2
Dependent Claim
163 words
A BRAKING CIRCUIT FOR A THREE-PHASE A.-C. INDUCTION MOTOR HAVING A THREE-PHASE STATOR WINDING, EACH OF SAID PHASES OF SAID STATOR WINDING HAVING A RESPECTIVE TERMINAL; SAID BRAKING CIRCUIT INCLUDING A FIRST AND SECOND D.-C. CURRENT INJECTION CIRCUIT; THE TERMINALS OF SAID FIRST D.-C. CURRENT INJECTION CIRCUIT RESPECTIVELY CONNECTED TO A FIRST AND A SECOND OF SAID STATOR WINDING TERMINALS; THE TERMINALS OF SAID SECOND D.-C. CURRENT INJECTION CIRCUIT RESPECTIVELY CONNECTED TO SAID SECOND TERMINAL AND A THIRD OF SAID STATOR WINDING TERMINALS EACH OF SAID D.-C. CURRENT INJECTION CIRCUITS INCLUDING A RESPECTIVE D.-C. VOLTAGE SOURCE, AND A RESPECTIVE SATURABLE REACTOR CONNECTED IN SERIES WITH SAID D.-C. VOLTAGE SOURCE AND THE SAID TERMINALS OF SAID RESPECTIVE D.-C. CURRENT INJECTION CIRCUIT; EACH OF SAID RESPECTIVE D.-C. VOLTAGE SOURCES INCLUDING A RECTIFIER MEANS, AND A COMMON SINGLE PHASE VOLTAGE SOURCE CONNECTED TO EACH OF SAID RECTIFIER MEANS; SAID FIRST AND SECOND D.-C. CURRENT INJECTION CIRCUITS CONDUCTING UNIDIRECTIONAL CURRENT PULSES 60* PHASE DISPLACED FROM ONE ANOTHER.
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) | 1970-04-10 | 1970-10-10 | 1971-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-10 | 1974-10-10 | 1975-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-10 | 1978-10-10 | 1979-04-11 | $7700.00 | Window Closed / Lapsed |