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US3813893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration system charging kit
Assignee: Addison Products Co
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Filing: 1972-10-30
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Granted: 1974-06-04
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Expires: 1992-10-30
Abstract
Abstract Apparatus, in the form of a kit, for charging refrigeration systems utilizing a refrigeration system suction line wherein a thermostatically operated valve sensing suction line temperature controls the introduction of refrigerant into the refrigeration system. A restrictor is interposed between the thermostatic valve and the refrigeration system suction line controlling the rate of flow of the refrigerant supplied to a rate permitting the refrigerant supplied to the thermostatic valve to be in a liquefied state, and at a rate which prevents overcharging of the system. A manually operated shutoff valve, and pressure gauge, interposed between the refrigerant supply and the thermostatic valve permits determination of the condition of the system being charged. Insulative means mount the thermostatic valve temperature sensing bulb to the suction line to permit accurate suction line temperature sensing.
Inventors
- 👤 J Gemender
- 👤 E Schwenker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:54
CPC Classifications
F; F25; F25B; F25B45/00; F25B2345/00; F25B2345/001; F25B2345/005; F25B2345/0051; F25B2345/006
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
123 words
A charging system in combination with a refrigeration apparatus having an evaporator, a condenser, and a compressor having a refrigerant suction line and a suction line port comprising, a thermostatic valve having an inlet, an outlet, and a temperature sensing bulb controlling said valve, a first passage for connecting said valve inlet with a refrigerant supply, a second passage connecting said outlet to the refrigerant suction line port, means attaching said bulb to the refrigerant suction line for sensing the temperature thereof, and a refrigerant flow restrictor means located within said second passage restricting the flow of refrigerant from said valve to said suction line to a rate preventing overcharging and permitting withdrawal of refrigerant from said supply while in a liquid state.
Claim 2
Dependent Claim
123 words
A charging system in combination with a refrigeration apparatus having an evaporator, a condenser, and a compressor having a refrigerant suction line and a suction line port comprising, a thermostatic valve having an inlet, an outlet, and a temperature sensing bulb controlling said valve, a first passage for connecting said valve inlet with a refrigerant supply, a second passage connecting said outlet to the refrigerant suction line port, means attaching said bulb to the refrigerant suction line for sensing the temperature thereof, and a refrigerant flow restrictor means located within said second passage restricting the flow of refrigerant from said valve to said suction line to a rate preventing overcharging and permitting withdrawal of refrigerant from said supply while in a liquid state.
Claim 3
Dependent Claim
25 words
In a charging system as in claim 1, a manually operated shutoff valve located within said first passage controlling refrigerant flow to said thermostatic valve.
Claim 4
Dependent Claim
24 words
In a charging system as in claim 2, a pressure gauge communicating with said first passage intermediate said shutoff valve and said thermostatic valve.
Claim 5
Dependent Claim
22 words
In a charging system as in claim 1 wherein said restrictor means comprises an orificed fitting attached to said thermostatic valve outlet.
Claim 6
Dependent Claim
19 words
In a charging system as in claim 4 wherein said orifice fitting has an orifice of approximately 0.043 inches.
Claim 7
Dependent Claim
115 words
A charging system in combination with a refrigeration apparatus having an evaporator, a condenser, and a compressor having a refrigerant suction line and a suction line port and utilizing a supply of liquefied refrigerant comprising, a thermostatic valve having an inlet connectable to the supply of liquefied refrigerant, an outlet for communicating with the suction line port, and a suction line temperature sensing bulb controlling said valve for communicating with the suction line, and a refrigerant flow restrictor means mounted on said valve outlet restricting the flow of refrigerant from said valve to said suction line port to a rate preventing overcharging and permitting withdrawal of refrigerant from said supply while in a liquid state.
Claim 8
Dependent Claim
115 words
A charging system in combination with a refrigeration apparatus having an evaporator, a condenser, and a compressor having a refrigerant suction line and a suction line port and utilizing a supply of liquefied refrigerant comprising, a thermostatic valve having an inlet connectable to the supply of liquefied refrigerant, an outlet for communicating with the suction line port, and a suction line temperature sensing bulb controlling said valve for communicating with the suction line, and a refrigerant flow restrictor means mounted on said valve outlet restricting the flow of refrigerant from said valve to said suction line port to a rate preventing overcharging and permitting withdrawal of refrigerant from said supply while in a liquid state.
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) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |