Patent US4205683A successfully refreshed from Google Patents.
Patent US3196629A successfully refreshed from Google Patents.
US3196629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refrigeration head pressure control systems
Assignee: Carrier Corp
•
Filing: 1964-06-01
•
Granted: 1965-07-27
•
Expires: 1984-06-01
Abstract
No abstract record available.
Inventors
- 👤 Russell E Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:33
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; F25B49/027; F25B2600/00; F25B2600/11; F25B2600/111; F25B2700/00; F25B2700/21; F25B2700/2116; Y; Y02; Y02B; Y02B30/00; Y02B30/70; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/917; Y10S388/918; Y10S388/923; Y10S388/934; Y10S62/00; Y10S62/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A REFRIGERATION SYSTEM COMPRISING A COMPRESSOR, A CONDENSER, AN EVAPORATOR, AND A REFRIGERANT METERING DEVICE CONNECTED TO PROVIDE REFRIGERATION; A FAN ARRANGED FOR PASSING AIR OVER SAID CONDENSER TO CONDENSE REFRIGERANT THEREIN; A FAN MOTOR ARRANGED TO DRIVE SAID FAN, SWITCH MEANS ARRANGED TO CONTROL THE PASSAGE OF CURRENT THROUGH SAID FAN MOTOR, SAID SWITCH INCLUDING ACTUATING MEANS TO ACTUATE SAID SWITCH TO A CONDUCTING STATE; TEMPERATURE RESPONSIVE MEANS DISPOSED IN HEAT EXCHANGE RELATION WITH SAID CONDENSER; MEANS PROVIDING TO SAID ACTUATING MEANS A CONTROL SIGNAL WHICH IS A FUNCTION OF TIME AND SENSED TEMPERATURE TO PERIODICALLY ACTUATE SAID SWITCH TO A CONDUCTING STATE; AND MEANS TO PERIODICALLY ACTUATE SAID SWITCH TO A NON-CONDUCTING STATE, SO AS TO LIMIT THE EFFECTIVE POWER SUPPLIED TO SAID MOTOR TO A VALUE WHICH RESULTS IN A FAN SPEED WHICH PROVIDES AT LEAST A PREDETERMINED DESIRED MINIMUM CONDENSER TEMPERATURE.
Claim 2
Dependent Claim
145 words
A REFRIGERATION SYSTEM COMPRISING A COMPRESSOR, A CONDENSER, AN EVAPORATOR, AND A REFRIGERANT METERING DEVICE CONNECTED TO PROVIDE REFRIGERATION; A FAN ARRANGED FOR PASSING AIR OVER SAID CONDENSER TO CONDENSE REFRIGERANT THEREIN; A FAN MOTOR ARRANGED TO DRIVE SAID FAN, SWITCH MEANS ARRANGED TO CONTROL THE PASSAGE OF CURRENT THROUGH SAID FAN MOTOR, SAID SWITCH INCLUDING ACTUATING MEANS TO ACTUATE SAID SWITCH TO A CONDUCTING STATE; TEMPERATURE RESPONSIVE MEANS DISPOSED IN HEAT EXCHANGE RELATION WITH SAID CONDENSER; MEANS PROVIDING TO SAID ACTUATING MEANS A CONTROL SIGNAL WHICH IS A FUNCTION OF TIME AND SENSED TEMPERATURE TO PERIODICALLY ACTUATE SAID SWITCH TO A CONDUCTING STATE; AND MEANS TO PERIODICALLY ACTUATE SAID SWITCH TO A NON-CONDUCTING STATE, SO AS TO LIMIT THE EFFECTIVE POWER SUPPLIED TO SAID MOTOR TO A VALUE WHICH RESULTS IN A FAN SPEED WHICH PROVIDES AT LEAST A PREDETERMINED DESIRED MINIMUM CONDENSER TEMPERATURE.
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) | 1968-07-26 | 1969-01-25 | 1969-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-07-26 | 1973-01-25 | 1973-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-07-26 | 1977-01-25 | 1977-07-27 | $7700.00 | Window Closed / Lapsed |