US3293876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration system including control arrangement for maintaining head pressure
Assignee: Carrier Corp
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Filing: 1964-10-28
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Granted: 1966-12-27
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Expires: 1984-10-28
Abstract
No abstract record available.
Inventors
- 👤 Richard H Geisler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:05
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; F25B49/027; F25B2600/00; F25B2600/11; F25B2600/111; Y; Y02; Y02B; Y02B30/00; Y02B30/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
IN A REFRIGERATION SYSTEM INCLUDING COMPRESSION MEANS HAVING SUCTION AND DISCHARGE SIDES, EXPANSION MEANS, FIRST HEAT EXCHANGE MEANS CONNECTING THE COMPRESSION MEANS DISCHARGE SIDE WITH THE EXPANSION MEANS, SECOND HEAT EXCHANGE MEANS CONNECTING THE EXPANSION MEANS WITH THE COMPRESSION MEANS SUCTION SIDE, AND A FAN FOR BRINGING AIR INTO HEAT EXCHANGE RELATIONSHIP WITH SAID FIRST HEAT EXCHANGE MEANS, THE COMBINATION OF A DRIVE MOTOR FOR SAID FAN; A CIRCUIT FOR ENERGIZING SAID DRIVE MOTOR; AN INDUCTANCE ACROSS SAID DRIVE MOTOR CIRCUIT HAVING AT LEAST ONE REDUCED VOLTAGE TAP; A SWITCH IN SAID DRIVE MOTOR CIRCUIT BETWEEN SAID DRIVE MOTOR AND SAID INDUCTANCE, SAID SWITCH BEING SAID DRIVE MOTOR MOVED TO CONNECT SAID DRIVE MOTOR WITH SAID REDUCED VOLTAGE TAP TO REDUCE POWER INPUT TO SAID FAN DRIVE MOTOR; AND MEANS FOR MOVING SAID SWITCH IN RESPONSE TO A PREDETERMINED CONDITION OF THE REFRIGERANT LEAVING SAID FIRST EXCHANGE MEANS TO ENERGIZE SAID FAN DRIVE MOTOR THROUGH SAID REDUCED VOLTAGE TAP.
Claim 2
Dependent Claim
159 words
IN A REFRIGERATION SYSTEM INCLUDING COMPRESSION MEANS HAVING SUCTION AND DISCHARGE SIDES, EXPANSION MEANS, FIRST HEAT EXCHANGE MEANS CONNECTING THE COMPRESSION MEANS DISCHARGE SIDE WITH THE EXPANSION MEANS, SECOND HEAT EXCHANGE MEANS CONNECTING THE EXPANSION MEANS WITH THE COMPRESSION MEANS SUCTION SIDE, AND A FAN FOR BRINGING AIR INTO HEAT EXCHANGE RELATIONSHIP WITH SAID FIRST HEAT EXCHANGE MEANS, THE COMBINATION OF A DRIVE MOTOR FOR SAID FAN; A CIRCUIT FOR ENERGIZING SAID DRIVE MOTOR; AN INDUCTANCE ACROSS SAID DRIVE MOTOR CIRCUIT HAVING AT LEAST ONE REDUCED VOLTAGE TAP; A SWITCH IN SAID DRIVE MOTOR CIRCUIT BETWEEN SAID DRIVE MOTOR AND SAID INDUCTANCE, SAID SWITCH BEING SAID DRIVE MOTOR MOVED TO CONNECT SAID DRIVE MOTOR WITH SAID REDUCED VOLTAGE TAP TO REDUCE POWER INPUT TO SAID FAN DRIVE MOTOR; AND MEANS FOR MOVING SAID SWITCH IN RESPONSE TO A PREDETERMINED CONDITION OF THE REFRIGERANT LEAVING SAID FIRST EXCHANGE MEANS TO ENERGIZE SAID FAN DRIVE MOTOR THROUGH SAID REDUCED VOLTAGE TAP.
References Cited (Backward Citations)
US2705404A
Cited
US2952991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |