Patent US3659433A successfully refreshed from Google Patents.
US3659433A
Expired / Lapsed
US
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Refrigeration system including a flow metering device
Assignee: Carrier Corp
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Filing: 1970-01-02
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Granted: 1972-05-02
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Expires: 1990-01-02
Abstract
Abstract A refrigerant flow metering device for use in a refrigeration system comprising a housing having an inlet and an outlet and defining a bore disposed within its confines, the ends of which communicate with the inlet and outlet, said bore being of a variable cross section to form a variable passage. A valve element positioned within the bore is capable of movement therein in response to changes in pressure in the refrigeration system. A spring associated with the valve element provides a force to move the element toward the inlet of said housing.
Inventors
- 👤 David N Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:42
CPC Classifications
F; F25; F25B; F25B41/00; F25B41/30; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7784; Y10T137/7792; Y10T137/7835; Y10T137/7837; Y10T137/7869
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
138 words
A refrigeration system including a compressor, a condenser, an evaporator, aNd a flow metering device disposed between said condenser and said evaporator, connected together to form said system, said compressor and said flow metering device defining therebetween a high pressure side and a low pressure side of said system, said flow metering device comprising: A. a valve housing having an inlet and an outlet and defining a bore disposed within its confines, said bore providing a flow path for refrigerant passing from said condenser to said evaporator through said flow metering device; and B. means operable to decrease the cross section of said bore as the pressure differential between said condenser and said evaporator increases, and being further operable to increase the cross section of said bore as the pressure differential between said condenser and said evaporator decreases.
Claim 2
Dependent Claim
138 words
A refrigeration system including a compressor, a condenser, an evaporator, aNd a flow metering device disposed between said condenser and said evaporator, connected together to form said system, said compressor and said flow metering device defining therebetween a high pressure side and a low pressure side of said system, said flow metering device comprising: A. a valve housing having an inlet and an outlet and defining a bore disposed within its confines, said bore providing a flow path for refrigerant passing from said condenser to said evaporator through said flow metering device; and B. means operable to decrease the cross section of said bore as the pressure differential between said condenser and said evaporator increases, and being further operable to increase the cross section of said bore as the pressure differential between said condenser and said evaporator decreases.
Claim 3
Dependent Claim
47 words
A refrigeration system in accordance with claim 1 wherein said last-mentioned means includes a valve element and a biasing member associated therewith, said biasing member providing a force acting on said valve element in opposition to a force provided by the refrigerant flowing through said metering device.
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |