Patent US3094604A successfully refreshed from Google Patents.
US3094604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle electric heating system
Assignee: Pullman Inc
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Filing: 1960-08-12
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Granted: 1963-06-18
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Expires: 1980-08-12
Abstract
No abstract record available.
Inventors
- 👤 Sluys William Van Der
- 👤 John L Swarner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:40
CPC Classifications
B; B61; B61D; B61D27/00; B61D27/0036; B61D27/0045; B60; B60L; B60L1/00; B60L1/02; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
AN ELECTRIC HEATING SYSTEM FOR AN ENCLOSURE HAVING MEANS FOR ADMITTING FRESH AIR THEREIN, SAID SYSTEM COMPRISING A MOTOR-OPERATED FRESH AIR INTAKE DAMPER, TWO SEPARATE HEATING ELEMENTS WITHIN SAID ENCLOSURE, A POWER SOURCE SUPPLYING A PREDETERMINED MAXIMUM AMOUNT OF POWER TO SAID SYSTEM, AN INTERLOCKING CONTROL CIRCUIT CONNECTING SAID POWER SOURCE WITH SAID DAMPER MOTOR AND EACH SAID HEATING ELEMENT THROUGH EITHER A DELTA OR A Y CONNECTION, SAID CONTROL CIRCUIT REGULATING SAID DAMPER AND SAID DELTA AND Y CONNECTIONS TO ADJUST THE AMOUNT OF FRESH AIR ADMITTED TO SAID SYSTEM AND TO FORM RESPECTIVELY EITHER A DELTA-Y OR A Y-DELTA PAIR OF CONNECTIONS FOR SAID HEATING ELEMENTS IN ACCORDANCE WITH TEMPERATURE DEMAND IN SAID ENCLOSURE WHEREBY SAID SYSTEM CONSUMES A CONSTANT POWER LOAD SUBSTANTIALLY EQUAL TO SAID MAXIMUM POWER SUPPLY AT ALL TIMES DURING OPERATION TO HEAT SAID ENCLOSURE.
Claim 2
Dependent Claim
140 words
AN ELECTRIC HEATING SYSTEM FOR AN ENCLOSURE HAVING MEANS FOR ADMITTING FRESH AIR THEREIN, SAID SYSTEM COMPRISING A MOTOR-OPERATED FRESH AIR INTAKE DAMPER, TWO SEPARATE HEATING ELEMENTS WITHIN SAID ENCLOSURE, A POWER SOURCE SUPPLYING A PREDETERMINED MAXIMUM AMOUNT OF POWER TO SAID SYSTEM, AN INTERLOCKING CONTROL CIRCUIT CONNECTING SAID POWER SOURCE WITH SAID DAMPER MOTOR AND EACH SAID HEATING ELEMENT THROUGH EITHER A DELTA OR A Y CONNECTION, SAID CONTROL CIRCUIT REGULATING SAID DAMPER AND SAID DELTA AND Y CONNECTIONS TO ADJUST THE AMOUNT OF FRESH AIR ADMITTED TO SAID SYSTEM AND TO FORM RESPECTIVELY EITHER A DELTA-Y OR A Y-DELTA PAIR OF CONNECTIONS FOR SAID HEATING ELEMENTS IN ACCORDANCE WITH TEMPERATURE DEMAND IN SAID ENCLOSURE WHEREBY SAID SYSTEM CONSUMES A CONSTANT POWER LOAD SUBSTANTIALLY EQUAL TO SAID MAXIMUM POWER SUPPLY AT ALL TIMES DURING OPERATION TO HEAT SAID ENCLOSURE.
References Cited (Backward Citations)
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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) | 1966-06-17 | 1966-12-17 | 1967-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-17 | 1970-12-17 | 1971-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-17 | 1974-12-17 | 1975-06-18 | $7700.00 | Window Closed / Lapsed |