US3107500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature-responsive heat pump defrosting unit
Assignee: Individual
•
Filing: 1961-04-24
•
Granted: 1963-10-22
•
Expires: 1981-04-24
Abstract
No abstract record available.
Inventors
- 👤 George L Coad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:07
CPC Classifications
F; F25; F25B; F25B13/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN COMBINATION, A HEAT PUMP INCLUDING A PAIR OF HEAT EXCHANGE UNITS IN CLOSED FLUID CIRCUIT WITH A COMPRESSOR; A CONTROL UNIT FOR CONTROLLING THE CYCLE OF OPERATION OF SAID HEAT PUMP COMPRISING: FIRST AND SECOND SWITCHES; A SOLENOID INCLUDING AN ARMATURE FOR ACTUATING SAID FIRST AND SECOND SWITCHES AND A SOLENOID COIL COMMUNICATING WITH A SOURCE OF POWER THROUGH SAID FIRST SWITCH, THROUGH A PRESSURE-RESPONSIVE SWITCH, AND THROUGH A TEMPERATURE-RESPONSIVE SWITCH, SAID TEMPERATURE-RESPONSIVE SWITCH BEING ARRANGED TO CLOSE AT A FIRST PREDETEMINED TEMPERATURE AND TO OPEN AT A SECOND AND HIGHER PREDETERMINED TEMPERATURE; AND TEMPERATURE-SENSING MEANS FOR ACTUATING SAID PRESSURE-RESPONSIVE SWITCH AT A TEMPERA-
Claim 2
Dependent Claim
105 words
IN COMBINATION, A HEAT PUMP INCLUDING A PAIR OF HEAT EXCHANGE UNITS IN CLOSED FLUID CIRCUIT WITH A COMPRESSOR; A CONTROL UNIT FOR CONTROLLING THE CYCLE OF OPERATION OF SAID HEAT PUMP COMPRISING: FIRST AND SECOND SWITCHES; A SOLENOID INCLUDING AN ARMATURE FOR ACTUATING SAID FIRST AND SECOND SWITCHES AND A SOLENOID COIL COMMUNICATING WITH A SOURCE OF POWER THROUGH SAID FIRST SWITCH, THROUGH A PRESSURE-RESPONSIVE SWITCH, AND THROUGH A TEMPERATURE-RESPONSIVE SWITCH, SAID TEMPERATURE-RESPONSIVE SWITCH BEING ARRANGED TO CLOSE AT A FIRST PREDETEMINED TEMPERATURE AND TO OPEN AT A SECOND AND HIGHER PREDETERMINED TEMPERATURE; AND TEMPERATURE-SENSING MEANS FOR ACTUATING SAID PRESSURE-RESPONSIVE SWITCH AT A TEMPERA-
References Cited (Backward Citations)
US2290984A
Cited
US2446910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |