Patent US3402914A successfully refreshed from Google Patents.
Patent US3273635A successfully refreshed from Google Patents.
US3273635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat pump controls
Assignee: Hupp Corp
•
Filing: 1964-04-17
•
Granted: 1966-09-20
•
Expires: 1984-04-17
Abstract
No abstract record available.
Inventors
- 👤 Harry W. Jobes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:58
CPC Classifications
F; F25; F25D; F25D21/00; F25D21/002; F25B; F25B13/00; F25B47/00; F25B47/02; F25B47/022; F25B47/025; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1919; G05D23/275; F25B2313/00; F25B2313/025; F25B2313/029; F25B2313/0292; F25B2313/0293; F25B2313/0294; F25B2400/00; F25B2400/07; F25B2400/075; F25B2600/00; F25B2600/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
A CONTROL FOR DEFROSTING A HEAT PUMP OPERATING ON A HEATING CYCLE, SAID HEAT PUMP HAVING INDOOR AND OUTDOOR COILS, COMPRESSOR MEANS FOR CIRCULATING REFRIGERANT THROUGH SAID COILS AND A VALVE MEANS FOR CONNECTING THE DELIVERY SIDE OF SAID COMPRESSOR MEANS TO SAID INDOOR COIL ON THE HEATING CYCLE OR TO SAID OUTDOOR COIL FOR COOLING OR DEFROSTING COMPRISING: A CLOCK MECHANISM FOR REGISTERING THE TIME OF OPERATION OF SAID COMPRESSOR MEANS, MEANS FOR PREVENTING THE OPERATION OF SAID CLOCK EXCEPT WHEN THE OUTDOOR AMBIENT TEMPERATURE IS BELOW THE LEVEL AT WHICH FROST ACCUMULATES ON SAID OUTDOOR COIL, MEANS ENERGIZED WHEN SAID CLOCK REGISTERS A PREDETERMINED ACCUMULATED TIME FOR OPERATING SAID VALVE MEANS TO CONNECT THE DELIVERY SIDE OF SAID COMPRESSOR MEANS TO SAID OUTDOOR COIL TO HEAT SAID OUTDOOR COIL, AND MEANS RESPONSIVE TO A RISE IN THE PRESSURE OF REFRIGERANT IN SAID OUTDOOR COIL TO REVERSE SAID VALVE MEANS TO AGAIN CONNECT THE DELIVERY SIDE OF SAID COMPRESSOR MEANS TO SAID OUTDOOR COIL.
Claim 2
Dependent Claim
165 words
A CONTROL FOR DEFROSTING A HEAT PUMP OPERATING ON A HEATING CYCLE, SAID HEAT PUMP HAVING INDOOR AND OUTDOOR COILS, COMPRESSOR MEANS FOR CIRCULATING REFRIGERANT THROUGH SAID COILS AND A VALVE MEANS FOR CONNECTING THE DELIVERY SIDE OF SAID COMPRESSOR MEANS TO SAID INDOOR COIL ON THE HEATING CYCLE OR TO SAID OUTDOOR COIL FOR COOLING OR DEFROSTING COMPRISING: A CLOCK MECHANISM FOR REGISTERING THE TIME OF OPERATION OF SAID COMPRESSOR MEANS, MEANS FOR PREVENTING THE OPERATION OF SAID CLOCK EXCEPT WHEN THE OUTDOOR AMBIENT TEMPERATURE IS BELOW THE LEVEL AT WHICH FROST ACCUMULATES ON SAID OUTDOOR COIL, MEANS ENERGIZED WHEN SAID CLOCK REGISTERS A PREDETERMINED ACCUMULATED TIME FOR OPERATING SAID VALVE MEANS TO CONNECT THE DELIVERY SIDE OF SAID COMPRESSOR MEANS TO SAID OUTDOOR COIL TO HEAT SAID OUTDOOR COIL, AND MEANS RESPONSIVE TO A RISE IN THE PRESSURE OF REFRIGERANT IN SAID OUTDOOR COIL TO REVERSE SAID VALVE MEANS TO AGAIN CONNECT THE DELIVERY SIDE OF SAID COMPRESSOR MEANS TO SAID OUTDOOR COIL.
References Cited (Backward Citations)
US2847833A
Cited
US2934323A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |