US3355906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration system including control for varying compressor speed
Assignee: Borg Warner Corp
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Filing: 1965-11-08
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Granted: 1967-12-05
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Expires: 1985-11-08
Abstract
No abstract record available.
Inventors
- 👤 Alwin B Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:13
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/04; F25B1/053; F04; F04D; F04D27/00; F04D27/02; F25B49/00; F25B49/02; F25B49/022; F25B2600/00; F25B2600/02; F25B2600/021; Y; Y02; Y02B; Y02B30/00; Y02B30/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A REFRIGERATION SYSTEM COMPRISING A COMPRESSOR, A CONDENSER, AND AN EVAPORATOR CONNECTED TO PROVIDE A CLOSED REFRIGERATION CIRCUIT; INFINITELY VARIABLE DRIVE MEANS OPERATIVELY CONNECTED TO DRIVE SAID COMPRESSOR; MEANS FOR DERIVING A CONTROL SIGNAL WHICH IS A FUNCTION OF THE RATIO BETWEEN THE DISCHARGE PRESSURE AND THE SUCTION PRESSURE OF SAID COMPRESSOR; AND REGULATING MEANS FOR MODULATING THE SPEED OF SAID INFINITELY VARIABLE DRIVE MEANS IN RESPONSE TO SAID CONTROL SIGNAL.
Claim 2
Dependent Claim
71 words
A REFRIGERATION SYSTEM COMPRISING A COMPRESSOR, A CONDENSER, AND AN EVAPORATOR CONNECTED TO PROVIDE A CLOSED REFRIGERATION CIRCUIT; INFINITELY VARIABLE DRIVE MEANS OPERATIVELY CONNECTED TO DRIVE SAID COMPRESSOR; MEANS FOR DERIVING A CONTROL SIGNAL WHICH IS A FUNCTION OF THE RATIO BETWEEN THE DISCHARGE PRESSURE AND THE SUCTION PRESSURE OF SAID COMPRESSOR; AND REGULATING MEANS FOR MODULATING THE SPEED OF SAID INFINITELY VARIABLE DRIVE MEANS IN RESPONSE TO SAID CONTROL SIGNAL.
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) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |