US4250716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary refrigeration system utilizing atmospheric air
Assignee: Individual
•
Filing: 1979-05-24
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Granted: 1981-02-17
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Expires: 1999-05-24
Abstract
Abstract Apparatus for use with refrigerators, particularly of the walk-in cooler type, wherein, when available, low temperature atmospheric air is drawn into the cooler for cooling purposes, rather than utilizing the usual compressor type refrigeration system. The apparatus is mounted within the space to be cooled and utilizes temperature sensing means for automatic operation, and in an embodiment, employs an electric storage battery which would permit extended operation in the event of a power failure.
Inventors
- 👤 Howard E. Huffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:33
CPC Classifications
F; F25; F25D; F25D1/00; F25B; F25B2700/00; F25B2700/21; F25B2700/2106
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
185 words
A unitized auxiliary refrigeration system utilizing atmospheric air for coolers having thermally insulated walls defining a cooled space and cooled by a primary refrigeration system comprising, in a combination, a rectangular housing adapted to be mounted within the space to be cooled having an end wall and sidewalls, an atmospheric air inlet defined in one of said housing walls, an atmospheric air outlet defined in another wall of said housing, a fan within said housing having an inlet port communicating with said atmospheric air inlet and an outlet port communicating with said atmospheric air outlet, an electric motor drivingly connected to said fan, first electric temperature sensing means mounted upon said housing sensing the temperature of the air within the space to be cooled, second electric temperature sensing means sensing the atmospheric air temperature, control means upon said housing electrically connected to said motor and first and second temperature sensing means adapted to energize said motor upon said first sensing means indicating the need for cooling and said second sensing means sensing a predetermined atmospheric temperature, and electric power supply means supplying said control means.
Claim 2
Dependent Claim
185 words
A unitized auxiliary refrigeration system utilizing atmospheric air for coolers having thermally insulated walls defining a cooled space and cooled by a primary refrigeration system comprising, in a combination, a rectangular housing adapted to be mounted within the space to be cooled having an end wall and sidewalls, an atmospheric air inlet defined in one of said housing walls, an atmospheric air outlet defined in another wall of said housing, a fan within said housing having an inlet port communicating with said atmospheric air inlet and an outlet port communicating with said atmospheric air outlet, an electric motor drivingly connected to said fan, first electric temperature sensing means mounted upon said housing sensing the temperature of the air within the space to be cooled, second electric temperature sensing means sensing the atmospheric air temperature, control means upon said housing electrically connected to said motor and first and second temperature sensing means adapted to energize said motor upon said first sensing means indicating the need for cooling and said second sensing means sensing a predetermined atmospheric temperature, and electric power supply means supplying said control means.
Claim 3
Dependent Claim
43 words
In an auxiliary refrigeration system as in claim 1, said first temperature sensing means including a first sensing bulb and said second temperature sensing means being mounted within said housing and including a second sensing bulb located within said housing atmospheric air inlet.
Claim 4
Dependent Claim
50 words
In an auxiliary refrigeration system as in claim 1 wherein said control means includes a transformer having a low voltage output and a relay, said power supply means comprising 110 volt AC supplying the input to said transformer, said temperature sensing means operating on said low voltage from said transformer.
Claim 5
Dependent Claim
55 words
In an auxiliary refrigeration system as in claim 1, wherein said control means includes a rechargable battery within said housing, a battery charger within said housing connected to said battery, and battery charger control means within said housing controlling operation of said charger, said power supply means being connected to said battery charger control means.
Claim 6
Dependent Claim
18 words
In an auxiliary refrigeration system as in claim 4 wherein said battery charger control means comprises a timer.
Claim 7
Dependent Claim
63 words
In an auxiliary refrigeration system as in claim 1, said housing including an air channel having an entrance and an exit in communication with the space to be cooled, a second electric fan within said air channel for moving air therethrough, said first temperature sensing means sensing the temperature within said air channel, said control means being electrically connected to said second fan.
Claim 8
Dependent Claim
25 words
In an auxiliary refrigeration system as in claim 6, said first temperature sensing means including a bulb, said bulb being located within said air channel.
Claim 9
Dependent Claim
18 words
In an auxiliary refrigeration system as in claim 7, said control means constantly energizing said second electric fan.
References Cited (Backward Citations)
US1053443A
Cited
US1600522A
Cited
US1693200A
Cited
US2067959A
Cited
US2216873A
Cited
US2407036A
Cited
US2855839A
Cited
US3659432A
Cited
US4006606A
Cited
US4023947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |