US3250084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control systems
Assignee: Carrier Corp
•
Filing: 1963-09-25
•
Granted: 1966-05-10
•
Expires: 1983-09-25
Abstract
No abstract record available.
Inventors
- 👤 Carl M Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:18
CPC Classifications
F; F25; F25B; F25B1/00; F25B1/04; F25B1/053; F25B2600/00; F25B2600/02; F25B2600/025; F25B2600/0253; Y; Y02; Y02B; Y02B30/00; Y02B30/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
A REFRIGERATION SYSTEM COMPRISING: (A) A COOLER FOR CHILLING A FLUID MEDIUM, SAID COOLER HAVING AN INLET FOR FLUID MEDIUM TO BE CHILLED AND AN OUTLET FOR CHILLED FLUID MEDIUM; (B) A COMPRESSOR CONNECTED WITH SAID COOLER TO PROVIDE REFRIGERATION TO CHILL A FLUID MEDIUM IN SAID COOLER; (C) REFRIGERANT FLOW CONTROL MEANS FOR CONTROLLING THE REFRIGERATION CAPACITY OF SAID REFRIGERATION SYSTEM BY VARYING REFRIGERANT FLOW THROUGH SAID SYSTEM; (D) A CONTROL CIRCUIT FOR VARYING THE REFRIGERATION CAPACITY OF SAID SYSTEM, SAID CONTROL CIRCUIT COMPRISING: (1) A FIRST SENSOR DISPOSED TO SENSE THE TEMPERATURE OF CHILLED FLUID LEAVING SAID COOLER, (2) A SECOND SENSOR DISPOSED TO SENSE THE TEMPERATURE OF FLUID ENTERING SAID COOLER FOR CHILLING THEREIN, (3) A THIRD SENSOR DISPOSED TO SENSE THE POSITION OF SAID REFRIGERANT FLOW CONTROL MEANS, AND (4) CIRCUIT MEANS COMBINING THE SUM OF A FUNCTION OF SAID FIRST SENSOR AND SAID SECOND SENSOR WITH A NEGATVE FEEDBACK FUNCTION OF SAID THIRD SENSOR TO PROVIDE A STABLE PROPORTIONAL BAND TYPE CONTROL HAVING A DESIRED STABLE OPERATING CHARACTERISTIC; AND (E) MEANS FOR ADJUSTING THE POSITION OF SAID REFRIGERANT FLOW CONTROL MEANS IN RESPONSE TO THE COMBINED SIGNAL OUTPUT OF SAID CONTROL CIRCUIT TO CONTROL THE CAPACITY OF SAID REFRIGERATION SYSTEM.
Claim 2
Dependent Claim
205 words
A REFRIGERATION SYSTEM COMPRISING: (A) A COOLER FOR CHILLING A FLUID MEDIUM, SAID COOLER HAVING AN INLET FOR FLUID MEDIUM TO BE CHILLED AND AN OUTLET FOR CHILLED FLUID MEDIUM; (B) A COMPRESSOR CONNECTED WITH SAID COOLER TO PROVIDE REFRIGERATION TO CHILL A FLUID MEDIUM IN SAID COOLER; (C) REFRIGERANT FLOW CONTROL MEANS FOR CONTROLLING THE REFRIGERATION CAPACITY OF SAID REFRIGERATION SYSTEM BY VARYING REFRIGERANT FLOW THROUGH SAID SYSTEM; (D) A CONTROL CIRCUIT FOR VARYING THE REFRIGERATION CAPACITY OF SAID SYSTEM, SAID CONTROL CIRCUIT COMPRISING: (1) A FIRST SENSOR DISPOSED TO SENSE THE TEMPERATURE OF CHILLED FLUID LEAVING SAID COOLER, (2) A SECOND SENSOR DISPOSED TO SENSE THE TEMPERATURE OF FLUID ENTERING SAID COOLER FOR CHILLING THEREIN, (3) A THIRD SENSOR DISPOSED TO SENSE THE POSITION OF SAID REFRIGERANT FLOW CONTROL MEANS, AND (4) CIRCUIT MEANS COMBINING THE SUM OF A FUNCTION OF SAID FIRST SENSOR AND SAID SECOND SENSOR WITH A NEGATVE FEEDBACK FUNCTION OF SAID THIRD SENSOR TO PROVIDE A STABLE PROPORTIONAL BAND TYPE CONTROL HAVING A DESIRED STABLE OPERATING CHARACTERISTIC; AND (E) MEANS FOR ADJUSTING THE POSITION OF SAID REFRIGERANT FLOW CONTROL MEANS IN RESPONSE TO THE COMBINED SIGNAL OUTPUT OF SAID CONTROL CIRCUIT TO CONTROL THE CAPACITY OF SAID REFRIGERATION SYSTEM.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-09 | 1969-11-08 | 1970-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-09 | 1973-11-08 | 1974-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-09 | 1977-11-08 | 1978-05-10 | $7700.00 | Window Closed / Lapsed |