US3238738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stage refrigeration system with by-pass means
Assignee: Individual
•
Filing: 1964-02-12
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Granted: 1966-03-08
•
Expires: 1984-02-12
Abstract
No abstract record available.
Inventors
- 👤 Robert C Webber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:28
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/10; F25B2400/00; F25B2400/04; F25B2400/0401
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
IN A PLURAL-STAGE REFRIGERATION SYSTEM, AN EVAPORTOR, A FIRST COMPRESSOR HAVING AN INTAKE AND AN OUTPUT, FIRST CONDUIT MEANS CONNECTING THE INTAKE OF SAID FIRST COMPRESSOR TO RECEIVE REFRIGERATION FROM SAID EVAPORATOR, A SECOND COMPRESSOR HAVING AN INTAKE AND AN OUTPUT, A SUCTION PRESSURE REGULATOR VALVE, SECOND CONDUIT MEANS CONNECTING FROM THE INTAKE OF SAID SECOND COMPRESSOR TO RECEIVE REFRIGERANT FROM THE OUTPUT OF SAID FIRST COMPRESSOR THROUGH SAID SUCTION PRESSURE REGULATOR VALVE, A CONDENSER, THIRD CONDUIT MEANS CONNECTING SAID CONDENSER TO RECEIVE REFRIGERANT FROM THE OUTPUT OF SAID SECOND COMPRESSOR, A BY-PASS CONNECTING SAID SECOND CONDUIT MEANS, AT A POINT BETWEEN SAID FIRST COMPRESSOR OUTPUT AND SAID SUCTION PRESSURE REGULATOR VALVE, WITH SAID THIRD CONDUIT MEANS, A CHECK VALVE IN SAID BY-PASS PREVENTING REFRIGERANT FLOW FROM SAID THIRD CONDUIT MEANS TOWARD SAID SECOND CONDUIT MEANS, AND FOURTH CONDUIT MEANS CONNECTING SAID EVAPORATOR TO RECEIVE REFRIGERANT FROM SAID CONDENSER.
Claim 2
Dependent Claim
149 words
IN A PLURAL-STAGE REFRIGERATION SYSTEM, AN EVAPORTOR, A FIRST COMPRESSOR HAVING AN INTAKE AND AN OUTPUT, FIRST CONDUIT MEANS CONNECTING THE INTAKE OF SAID FIRST COMPRESSOR TO RECEIVE REFRIGERATION FROM SAID EVAPORATOR, A SECOND COMPRESSOR HAVING AN INTAKE AND AN OUTPUT, A SUCTION PRESSURE REGULATOR VALVE, SECOND CONDUIT MEANS CONNECTING FROM THE INTAKE OF SAID SECOND COMPRESSOR TO RECEIVE REFRIGERANT FROM THE OUTPUT OF SAID FIRST COMPRESSOR THROUGH SAID SUCTION PRESSURE REGULATOR VALVE, A CONDENSER, THIRD CONDUIT MEANS CONNECTING SAID CONDENSER TO RECEIVE REFRIGERANT FROM THE OUTPUT OF SAID SECOND COMPRESSOR, A BY-PASS CONNECTING SAID SECOND CONDUIT MEANS, AT A POINT BETWEEN SAID FIRST COMPRESSOR OUTPUT AND SAID SUCTION PRESSURE REGULATOR VALVE, WITH SAID THIRD CONDUIT MEANS, A CHECK VALVE IN SAID BY-PASS PREVENTING REFRIGERANT FLOW FROM SAID THIRD CONDUIT MEANS TOWARD SAID SECOND CONDUIT MEANS, AND FOURTH CONDUIT MEANS CONNECTING SAID EVAPORATOR TO RECEIVE REFRIGERANT FROM SAID CONDENSER.
References Cited (Backward Citations)
US335386A
Cited
US2456386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-07 | 1969-09-06 | 1970-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-07 | 1973-09-06 | 1974-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-07 | 1977-09-06 | 1978-03-08 | $7700.00 | Window Closed / Lapsed |