US4494386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor refrigeration cycle system with constrained rotary vane compressor and low vapor pressure refrigerant
Assignee: Rovac Corp
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Filing: 1982-03-15
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Granted: 1985-01-22
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Expires: 2002-03-15
Abstract
Abstract A refrigeration system including a compressor, a condenser, an expansion valve and an evaporator with controls and interconnections to provide a system operating in a vapor refrigeration cycle containing a refrigerant or combination thereof selected from a group of low vapor pressure refrigerants having boiling points anywhere from about 10 degrees F. to 83 degrees F. and the compressor comprising an open system constrained rotary vane compressor having a ratio Q/D of cooling capacity per unit of displacement anywhere in the range from about 8,000 to 30,000 FT-LB per HR/FT 3 per HR determined by the refrigerant or combination thereof in the system and according to a specified formula.
Inventors
- 👤 Thomas C. Edwards
- 👤 Wayne C. Shank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:32
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/04; C; C09; C09K; C09K5/00; C09K5/02; C09K5/04; C09K5/041; C09K5/042; C09K5/044
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
118 words
A refrigeration system including a compressor, a condenser, an expansion valve and an evaporator with controls and interconnections to provide a system operating in a vapor refrigeration cycle, said system containing a refrigerant or combination thereof selected from a group of low vapor pressure refrigerants having boiling points anywhere from about 10 degrees F. to 83 degrees F., said compressor comprising an open system constrained rotary vane compressor having a ratio Q/D of cooling capacity per unit of displacement anywhere in the range from about 8,000 to 30,000 FT-LB per HR/FT 3 per HR determined by the refrigerant or combination thereof in the system and according to ##EQU1## for medium capacity refrigeration, air conditioning and heat pump applications.
Claim 2
Dependent Claim
118 words
A refrigeration system including a compressor, a condenser, an expansion valve and an evaporator with controls and interconnections to provide a system operating in a vapor refrigeration cycle, said system containing a refrigerant or combination thereof selected from a group of low vapor pressure refrigerants having boiling points anywhere from about 10 degrees F. to 83 degrees F., said compressor comprising an open system constrained rotary vane compressor having a ratio Q/D of cooling capacity per unit of displacement anywhere in the range from about 8,000 to 30,000 FT-LB per HR/FT 3 per HR determined by the refrigerant or combination thereof in the system and according to ##EQU1## for medium capacity refrigeration, air conditioning and heat pump applications.
Claim 3
Dependent Claim
117 words
A refrigeration system including a compressor, and means providing a system operable in a vapor refrigeration cycle, said system containing any refrigerant or combination thereof from a group of low vapor pressure refrigerants having boiling points from about 10 degrees F. to 83 degrees F., and said compressor comprising an open system constrained rotary vane compressor having a ratio Q/D of cooling capacity per unit of displacement anywhere in the range of from about 8,000 to 30,000 FT-LB per HR/FT 3 per HR determined by the refrigerant or combination thereof in the system and according to ##EQU2## for refrigeration, air conditioning and heat pump applications in the range of about one-half to ten tons of refrigeration capacity.
Claim 4
Dependent Claim
117 words
A refrigeration system including a compressor, and means providing a system operable in a vapor refrigeration cycle, said system containing any refrigerant or combination thereof from a group of low vapor pressure refrigerants having boiling points from about 10 degrees F. to 83 degrees F., and said compressor comprising an open system constrained rotary vane compressor having a ratio Q/D of cooling capacity per unit of displacement anywhere in the range of from about 8,000 to 30,000 FT-LB per HR/FT 3 per HR determined by the refrigerant or combination thereof in the system and according to ##EQU2## for refrigeration, air conditioning and heat pump applications in the range of about one-half to ten tons of refrigeration capacity.
Claim 5
Dependent Claim
24 words
A refrigeration system according to claim 2 in which high side pressures at the output of said compressor do not exceed about 120 psig.
References Cited (Backward Citations)
US4299097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |