Patent US3859816A successfully refreshed from Google Patents.
US3859816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable air conditioner unit for use in mines and other like restricted areas
Assignee: Individual
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Filing: 1974-01-23
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Granted: 1975-01-14
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Expires: 1994-01-23
Abstract
Abstract A portable air conditioner unit which is entirely self-contained and sized to be readily moved about in the hot, humid, dusty and restricted working areas or passageways of mines or other similar areas which is capable of supplying such working areas with an abundant flow of recirculated, clean, filtered, dehumidified and cooled air when in operation.
Inventors
- 👤 Howard E Mcdonald
- 👤 James E Caffall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:43
CPC Classifications
E; E21; E21F; E21F3/00; F; F24; F24F; F24F1/00; F24F1/02; F24F1/022; F24F1/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
183 words
A mine cooling unit comprising: a housing, said housing being of a size capable of being positioned in and moved along a mine passageway, said housing including an air intake, an air outlet and an air passageway extending between said air intake and air outlet at the base of said housing, a removable filter mounted in said air intake, a fan positioned in said air passageway adjacent said air intake for drawing air therethrough, an enclosed chamber arranged in said housing above said air passageway and isolated therefrom, a motor operatively connected with said fan, refrigeration apparatus comprising a compressor, a condenser and an evaporator coil, said compressor and condenser being located in said chamber and said coil being located within said air passageway juxtapositioned to said air outlet, whereby the passage of air through said air passageway is cooled at the air outlet end of said housing to avoid condensation in said housing upstream thereof, and a drain trap and outlet mounted at the base of said coil downstream thereof for collecting and draining from said housing water condensed by said coil.
Claim 2
Dependent Claim
183 words
A mine cooling unit comprising: a housing, said housing being of a size capable of being positioned in and moved along a mine passageway, said housing including an air intake, an air outlet and an air passageway extending between said air intake and air outlet at the base of said housing, a removable filter mounted in said air intake, a fan positioned in said air passageway adjacent said air intake for drawing air therethrough, an enclosed chamber arranged in said housing above said air passageway and isolated therefrom, a motor operatively connected with said fan, refrigeration apparatus comprising a compressor, a condenser and an evaporator coil, said compressor and condenser being located in said chamber and said coil being located within said air passageway juxtapositioned to said air outlet, whereby the passage of air through said air passageway is cooled at the air outlet end of said housing to avoid condensation in said housing upstream thereof, and a drain trap and outlet mounted at the base of said coil downstream thereof for collecting and draining from said housing water condensed by said coil.
Claim 3
Dependent Claim
17 words
The mine cooling unit set forth in claim 1 wherein: said housing is mounted on a carriage.
Claim 4
Dependent Claim
17 words
The mine cooling unit set forth in claim 1 wherein: said motor is located in said chamber.
Claim 5
Dependent Claim
30 words
The mine cooling unit set forth in claim 1 wherein: the longitudinal axis of said air passageway is below the longitudinal axes of said air intake and said air outlet.
Claim 6
Dependent Claim
24 words
The mine cooling unit set forth in claim 4 wherein: the longitudinal axes of said air intake and said air outlet are coaxially aligned.
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) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |