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US4272969A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for refrigerating fresh products and keeping them fresh, as well as refrigerator for carrying out this method

Assignee: Individual
•
Filing: 1978-02-03
•
Granted: 1981-06-16
•
Expires: 1998-02-03
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Abstract

Abstract A refrigerator for maintaining high humidity therein where the evaporator surfaces are oversized and maintained at a frost-free temperature, continuous forced air is passed over the evaporator and over a drip water dish within the refrigerator compartment, and the compartment is vented to the outside of the refrigerator.

Inventors

  • 👤 Fernand Schwitzgebel

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 15:43
CPC Classifications
F; F25; F25D; F25D17/00; F25D17/04; F25D17/06; F25D17/062; F25D17/042; F25D21/00; F25D21/14; F25B; F25B2400/00; F25B2400/05; F25B2400/052; F25B2400/054; F25D2317/00; F25D2317/04; F25D2317/041; F25D2317/0413; F25D2317/06; F25D2317/068; F25D2317/0683; F25D2321/00; F25D2321/14; F25D2321/141; F25D2321/1411

Claims Analysis

Total Claims: 15
Claim 1
Independent Claim 162 words
A high humidity refrigerator for preventing the withdrawal of moisture from food products therein, said refrigerator including (a) a cold insulated compartment (b) a compressor, condenser and evaporator connected by refrigerant lines (c) said evaporator being positioned within, and in the upper portion of, said cold insulated compartment, and having a surface temperature above 0° C. (d) a continuously operating fan located within said cold insulated compartment above said evaporator for directing air vertically downwardly past the evaporator to prevent icing of the evaporator surface, resulting in the formation of condensation thereon, and (e) a drip dish in the lower portion of the compartment beneath the evaporator for receiving water produced by the condensation dropping from the evaporator (f) said drip dish lying in the direct path of the air flow from the fan, whereby the air impinges upon the water contained in the drip dish to constantly absorb moisture therefrom and return it into the air surrounding the goods being refrigerated.
Claim 2
Dependent Claim 162 words
A high humidity refrigerator for preventing the withdrawal of moisture from food products therein, said refrigerator including (a) a cold insulated compartment (b) a compressor, condenser and evaporator connected by refrigerant lines (c) said evaporator being positioned within, and in the upper portion of, said cold insulated compartment, and having a surface temperature above 0° C. (d) a continuously operating fan located within said cold insulated compartment above said evaporator for directing air vertically downwardly past the evaporator to prevent icing of the evaporator surface, resulting in the formation of condensation thereon, and (e) a drip dish in the lower portion of the compartment beneath the evaporator for receiving water produced by the condensation dropping from the evaporator (f) said drip dish lying in the direct path of the air flow from the fan, whereby the air impinges upon the water contained in the drip dish to constantly absorb moisture therefrom and return it into the air surrounding the goods being refrigerated.
Claim 3
Dependent Claim 33 words
The refrigerator of claim 1, wherein (a) said drip dish is provided with an overflow drain which extends above the bottom of the dish to drain off excess water from the drip dish.
Claim 4
Dependent Claim 29 words
The refrigerator of claim 2, with the addition of (a) a collecting trough exteriorly of said compartment, and in communication with said overflow drain, for receiving the excess water.
Claim 5
Dependent Claim 28 words
The refrigerator of claim 1, with the addition of (a) at least one vent opening in said compartment for exchanging air from within the compartment to the outside.
Claim 6
Dependent Claim 16 words
The refrigerator of claim 1, wherein (a) said continuously operated fan is a radial flow fan.
Claim 7
Dependent Claim 52 words
The refrigerator of claim 1, wherein (a) said evaporator is of the lamination type (b) said evaporator including evaporator coils (c) laminations perpendicular to, and in contact with, said evaporator coils, whereby the air flowing over said laminations, draws the cold away from the evaporator and into the interior of the compartment.
Claim 8
Dependent Claim 201 words
A high humidity refrigerator for preventing the withdrawal of moisture from food products therein, said refrigerator including (a) a cold insulated compartment (b) a compressor, condenser and evaporator connected by refrigerant lines (c) said evaporator being positioned within, and in the upper portion of, said cold insulated compartment, and having a surface temperature above 0° C. (d) a continuously operating fan located within said cold insulated compartment above said evaporator for directing air vertically downwardly past the evaporator to prevent icing of the evaporator surface, resulting in the formation of condensation therein (e) a drip dish in the lower portion of the compartment beneath the evaporator for receiving water produced by the condensation dropping from the evaporator (f) said drip dish lying in the direct path of the air flow from the fan, whereby the air impinges upon the water contained in the drip dish to constantly absorb moisture therefrom and return it into the air surrounding the goods to be refrigerated (g) an overflow drain which extends above the bottom of the dish to drain off excess water from the drip dish, and (h) a vent opening in said compartment for exchanging air from within the compartment to the outside.
Claim 9
Dependent Claim 201 words
A high humidity refrigerator for preventing the withdrawal of moisture from food products therein, said refrigerator including (a) a cold insulated compartment (b) a compressor, condenser and evaporator connected by refrigerant lines (c) said evaporator being positioned within, and in the upper portion of, said cold insulated compartment, and having a surface temperature above 0° C. (d) a continuously operating fan located within said cold insulated compartment above said evaporator for directing air vertically downwardly past the evaporator to prevent icing of the evaporator surface, resulting in the formation of condensation therein (e) a drip dish in the lower portion of the compartment beneath the evaporator for receiving water produced by the condensation dropping from the evaporator (f) said drip dish lying in the direct path of the air flow from the fan, whereby the air impinges upon the water contained in the drip dish to constantly absorb moisture therefrom and return it into the air surrounding the goods to be refrigerated (g) an overflow drain which extends above the bottom of the dish to drain off excess water from the drip dish, and (h) a vent opening in said compartment for exchanging air from within the compartment to the outside.
Claim 10
Dependent Claim 34 words
The refrigerator of claim 7, with the addition of (a) a collecting trough exteriorly of said compartment and in communication with said overflow drain for collecting the excess water drained from said drip dish.
Claim 11
Dependent Claim 16 words
The refrigerator of claim 7, wherein (a) said continuously operated fan is a radial flow fan.
Claim 12
Dependent Claim 51 words
The regrigerator of claim 7, wherein (a) said evaporator is of the lamination type and includes evaporator coils, and (b) laminations perpendicular to, and in contact with, said evaporator coils, whereby the air flowing over said laminations draws the cold away from the evaporator and into the interior of the compartment.
Claim 13
Dependent Claim 23 words
The refrigerator of claim 7, with the addition of (a) a throttle element located in the refrigerant line between said compressor and evaporator.
Claim 14
Dependent Claim 14 words
The refrigerator of claim 11, wherein (a) said throttle element is a capillary pipe.
Claim 15
Dependent Claim 26 words
The refrigerator of claim 7, wherein (a) the surface of said evaporator is in excess of double the size of evaporators of refrigerators of comparable size.

References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-06-15 1984-12-15 1985-06-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-06-15 1988-12-15 1989-06-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-06-15 1992-12-15 1993-06-16 $7700.00 Window Closed / Lapsed

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