Patent US3575011A successfully refreshed from Google Patents.
US3575011A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forced air freezer
Assignee: Whirlpool Corp
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Filing: 1969-02-18
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Granted: 1971-04-13
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Expires: 1989-02-18
Abstract
Abstract A refrigeration apparatus that has substantially uniform temperature throughout a storage enclosure in the apparatus comprising boundary walls defining the enclosure, an air duct substantially coextensive with a major portion of one of the walls and having edges adjacent others of the walls that are adjacent the one wall, peripheral discharge means at the air duct edges for directing air from the duct along the adjacent wall and toward a second wall that is directly opposite the one wall for flow of the discharge air along this second wall also, an air inlet adjacent one end of the duct for receiving air from the enclosure including the air that flows into the enclosure from along the second wall, means for forcing air through the air duct and means for refrigerating the duct air.
Inventors
- 👤 Charles R Dill
- 👤 Sylvester A Winterheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:04
CPC Classifications
F; F25; F25D; F25D17/00; F25D17/04; F25D17/06; F25D17/062; A; A47; A47F; A47F3/00; A47F3/04; A47F3/0404; A47F3/0408; F25D17/042; F25D17/045; F25D2400/00; F25D2400/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
123 words
Refrigeration apparatus having substantially uniform temperature throughout a storage enclosure therein, comprising: boundary walls defining said enclosure; an air duct means substantially coextensive with a major portion of one of said walls and having edges adjacent to but spaced from others of said walls; peripheral discharge means at said air duct means edges for providing streams of air at said edges directed along said adjacent walls and toward a second wall that is directly opposite said one wall for flow along said second wall; an air inlet means adjacent one end of said duct means for receiving air from said enclosure including air from along said second wall; means for forcing air through said air duct; and means for refrigerating said duct air.
Claim 2
Dependent Claim
123 words
Refrigeration apparatus having substantially uniform temperature throughout a storage enclosure therein, comprising: boundary walls defining said enclosure; an air duct means substantially coextensive with a major portion of one of said walls and having edges adjacent to but spaced from others of said walls; peripheral discharge means at said air duct means edges for providing streams of air at said edges directed along said adjacent walls and toward a second wall that is directly opposite said one wall for flow along said second wall; an air inlet means adjacent one end of said duct means for receiving air from said enclosure including air from along said second wall; means for forcing air through said air duct; and means for refrigerating said duct air.
Claim 3
Dependent Claim
34 words
The apparatus of claim 1 wherein said second wall comprises an access door having edge sealing means past which said air flows thereby carrying with it any exterior air leakage past said sealing means.
Claim 4
Dependent Claim
24 words
The apparatus of claim 1 wherein said means for forcing air through said duct means comprises blower means adjacent said duct air inlet means.
Claim 5
Dependent Claim
50 words
The apparatus of claim 1 wherein said means for refrigerating said duct air comprises a refrigerant evaporator, a housing therefor communicating with said storage enclosure and with said duct means entrance, and blower means in said housing for forcing air over said evaporator and into and through said duct means.
Claim 6
Dependent Claim
36 words
The apparatus of claim 4 wherein said evaporator, housing and blower means are positioned at said one wall adjacent said major portion of said one wall and adjacent said air inlet means to the duct means.
Claim 7
Dependent Claim
28 words
The apparatus of claim 2 wherein said one wall is a rear wall, said adjacent walls are top and sidewalls and said other wall is a front wall.
Claim 8
Dependent Claim
89 words
The apparatus of claim 6 wherein said means for refrigerating said duct air comprises a refrigerant evaporator, a housing therefor communicating with said storage enclosure and with said duct means entrance, and blower means in said housing for forcing air over said evaporator and into and through said duct means, and said evaporator, housing and blower means are positioned at said one wall adjacent said major portion of said one wall and adjacent said air inlet means to the duct means and above a bottom wall of said enclosure.
Claim 9
Dependent Claim
140 words
Refrigeration apparatus having substantially uniform temperature throughout a storage enclosure therein, comprising: boundary walls defining said enclosure; an air duct means substantially coextensive with a major portion of one of said walls and having edges adjacent others of said walls; peripheral discharge means at said air duct means edges for directing air from said duct along said adjacent walls and toward a second wall thAt is directly opposite said one wall for flow along said second wall; an air inlet means adjacent one end of said duct means for receiving air from said enclosure including air from along said second wall; means for forcing air through said air duct; means for refrigerating said duct air; and air flow control valve means in said duct means movable between open and closed positions for passing refrigerated air directly into said storage enclosure.
Claim 10
Dependent Claim
140 words
Refrigeration apparatus having substantially uniform temperature throughout a storage enclosure therein, comprising: boundary walls defining said enclosure; an air duct means substantially coextensive with a major portion of one of said walls and having edges adjacent others of said walls; peripheral discharge means at said air duct means edges for directing air from said duct along said adjacent walls and toward a second wall thAt is directly opposite said one wall for flow along said second wall; an air inlet means adjacent one end of said duct means for receiving air from said enclosure including air from along said second wall; means for forcing air through said air duct; means for refrigerating said duct air; and air flow control valve means in said duct means movable between open and closed positions for passing refrigerated air directly into said storage enclosure.
Claim 11
Dependent Claim
24 words
The apparatus of claim 8 wherein said valve means comprises a slidable plate having openings adapted to register with openings in said duct means.
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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |