US3214664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible polyphase motor with phase protective device
Assignee: KITO SEISAKUSHO KK
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Filing: 1961-08-15
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Granted: 1965-10-26
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Expires: 1981-08-15
Abstract
No abstract record available.
Inventors
- 👤 Ishikawa Shogo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:23
CPC Classifications
H; H02; H02H; H02H7/00; H02H7/08; H02H7/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
IN COMBINATION WITH A THREE-PHASE MOTOR CONNECTED TO A THREE-PHASE SOURCE THROUGH A ROTATION DIRECTION CONTROL SWITCH OPERABLE TO SELECTIVELY CHANGE THE MOTOR ROTATION DIRECTION BY REVERSING THE CONNECTIONS OF ONE PHASE OF SAID SOURCE TO SAID MOTOR: MEANS FOR ENSURING PROPER DIRECTION OF ROTATION OF SAID MOTOR IN ACCORDANCE WITH PRE-SET OPERATION OF SAID REVERSING SWITCH, SAID MEANS COMPRISING, IN COMBINATION, REVERSING SWITCH MEANS CONNECTED IN SAID ONE PHASE BETWEEN SAID SOURCE AND SAID MOTOR AND OPERABLE, WHEN ACTUATED, TO INTERCHANGE THE CONNECTIONS OF SAID ONE PHASE TO SAID MOTOR; AND POLYPHASE ACTUATING MEANS FOR SAID REVERSING SWITCH MEANS CONNECTED TO SAID SOURCE AND OPERABLE, RESPONSIVE TO A POLARITY REVERSAL OF SAID ONE PHASE, TO ACTUATE SAID REVERSING SWITCH MEANS TO INTERCHANGE THE CONNECTIONS OF SAID ONE PHASE TO SAID MOTOR THROUGH SAID CONTROL SWITCH.
Claim 2
Dependent Claim
136 words
IN COMBINATION WITH A THREE-PHASE MOTOR CONNECTED TO A THREE-PHASE SOURCE THROUGH A ROTATION DIRECTION CONTROL SWITCH OPERABLE TO SELECTIVELY CHANGE THE MOTOR ROTATION DIRECTION BY REVERSING THE CONNECTIONS OF ONE PHASE OF SAID SOURCE TO SAID MOTOR: MEANS FOR ENSURING PROPER DIRECTION OF ROTATION OF SAID MOTOR IN ACCORDANCE WITH PRE-SET OPERATION OF SAID REVERSING SWITCH, SAID MEANS COMPRISING, IN COMBINATION, REVERSING SWITCH MEANS CONNECTED IN SAID ONE PHASE BETWEEN SAID SOURCE AND SAID MOTOR AND OPERABLE, WHEN ACTUATED, TO INTERCHANGE THE CONNECTIONS OF SAID ONE PHASE TO SAID MOTOR; AND POLYPHASE ACTUATING MEANS FOR SAID REVERSING SWITCH MEANS CONNECTED TO SAID SOURCE AND OPERABLE, RESPONSIVE TO A POLARITY REVERSAL OF SAID ONE PHASE, TO ACTUATE SAID REVERSING SWITCH MEANS TO INTERCHANGE THE CONNECTIONS OF SAID ONE PHASE TO SAID MOTOR THROUGH SAID CONTROL SWITCH.
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |