Patent CH350200A successfully refreshed from Google Patents.
Patent US3320765A successfully refreshed from Google Patents.
US3320765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mine cooling unit
Assignee: Individual
•
Filing: 1966-02-18
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Granted: 1967-05-23
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Expires: 1986-02-18
Abstract
No abstract record available.
Inventors
- 👤 Rollin S Chapple
- 👤 John F Siegel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:03
CPC Classifications
F; F25; F25D; F25D15/00; E; E21; E21F; E21F3/00; F24; F24F; F24F1/00; F24F1/02; F24F1/022; F24F1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A MINE COOLING UNIT COMPRISING A CARRIAGE; A HOUSING CARRIED BY SAID CARRIAGE; SAID CARRIAGE AND HOUSING BEING OF A SIZE CAPABLE OF BEING POSITIONED IN AND MOVED ALONG A MINE PASSAGE; SAID HOUSING INCLUDING AN AIR INTAKE, AN AIR OUTLET AND AN AIR PASSAGEWAY EXTENDING BETWEEN SAID AIR INTAKE AND SAID AIR OUTLET; A FAN POSITIONED IN SAID AIR PASSAGEWAY FOR DRAWING AIR THERETHROUGH; A MOTOR LOCATED ADJACENT SAID AIR PASSAGEWAY AND OPERATIVELY CONNECTED WITH SAID FAN; REFRIGERATION APPARATUS LOCATED SUBSTANTIALLY IN SAID HOUSING, SAID REFRIGERATION APPARATUS COMPRISING A COMPRESSOR, A CONDENSER AND AN EVAPORATOR COIL; SAID COIL BEING LOCATED WITHIN SAID AIR PASSAGEWAY BETWEEN SAID AIR INTAKE AND SAID FAN AND HAVING SUFFICIENTLY SMALL AIR PASSAGES THERETHROUGH TO PREVENT DEBRIS OF ANY SUBSTANTIAL SIZE FROM ENGAGING SAID FAN; SAID CONDENSER BEING LOCATED ADJACENT TO THE BOTTOM OF SAID HOUSING AND SAID MOTOR AND SAID COMPRESSOR BEING LOCATED BELOW SAID AIR PASSAGEWAY AND ADJACENT SAID CONDENSER.
Claim 2
Dependent Claim
157 words
A MINE COOLING UNIT COMPRISING A CARRIAGE; A HOUSING CARRIED BY SAID CARRIAGE; SAID CARRIAGE AND HOUSING BEING OF A SIZE CAPABLE OF BEING POSITIONED IN AND MOVED ALONG A MINE PASSAGE; SAID HOUSING INCLUDING AN AIR INTAKE, AN AIR OUTLET AND AN AIR PASSAGEWAY EXTENDING BETWEEN SAID AIR INTAKE AND SAID AIR OUTLET; A FAN POSITIONED IN SAID AIR PASSAGEWAY FOR DRAWING AIR THERETHROUGH; A MOTOR LOCATED ADJACENT SAID AIR PASSAGEWAY AND OPERATIVELY CONNECTED WITH SAID FAN; REFRIGERATION APPARATUS LOCATED SUBSTANTIALLY IN SAID HOUSING, SAID REFRIGERATION APPARATUS COMPRISING A COMPRESSOR, A CONDENSER AND AN EVAPORATOR COIL; SAID COIL BEING LOCATED WITHIN SAID AIR PASSAGEWAY BETWEEN SAID AIR INTAKE AND SAID FAN AND HAVING SUFFICIENTLY SMALL AIR PASSAGES THERETHROUGH TO PREVENT DEBRIS OF ANY SUBSTANTIAL SIZE FROM ENGAGING SAID FAN; SAID CONDENSER BEING LOCATED ADJACENT TO THE BOTTOM OF SAID HOUSING AND SAID MOTOR AND SAID COMPRESSOR BEING LOCATED BELOW SAID AIR PASSAGEWAY AND ADJACENT SAID CONDENSER.
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) | 1970-05-22 | 1970-11-21 | 1971-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-22 | 1974-11-21 | 1975-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-22 | 1978-11-21 | 1979-05-23 | $7700.00 | Window Closed / Lapsed |