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US3848429A Expired / Lapsed US ⏱️ 0.0 years remaining

Holdover cooling unit

Assignee: Individual
•
Filing: 1972-11-10
•
Granted: 1974-11-19
•
Expires: 1992-11-10
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Abstract

Abstract A cooling unit for mounting within a container to be maintained refrigerated or which may be utilized as a temporary portable and substantially self-contained air conditioning unit. The unit includes an outer cabinet or housing which may be closed at its top, provided with depending support legs and open at its bottom. The cabinet includes an upper air outlet opening in an upper wall portion thereof and a blower assembly is operatively associated with the air outlet opening for blowing air from within the upper portion of the cabinet outwardly therefrom, circulation air for the interior of the cabinet being drawn thereinto through the open bottom thereof. The interior of the cabinet contains one or more hollow tanks constructed of good heat conducting material and each tank is partially filled with a eutectic solution. Further, each tank has a coil of good heat transmitting material disposed therein with the inlet and outlet ends of the coil opening outwardly of the tank. The outlet ends of the coils open into an exhaust manifold which may discharge to the exterior of the cabinet and the inlet ends of the coils open into an inlet manifold provided with a supply line therefor whose inlet end is accessible from the exterior of the cabinet, the supply line being adapted for connection with a source of liquid nitrogen.

Inventors

  • 👤 P Franklin

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 15:34
CPC Classifications
F; F25; F25D; F25D3/00; F25D3/10

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 138 words
In combination with a source of liquid nitrogen under pressure, a housing including air inlet and air outlet openings and blower means operatively associated with the housing for pumping air through the housing and out the air outlet opening, at least one closed tank disposed within the housing for the passage of air being pumped through the housing in heat transfer relation with the outer surfaces of the tank, a quantity of eutectic solution disposed within the tank, and a coil of good heat transmitting material disposed within the tank and including inlet and outlet ends opening outwardly of the tank, fluid flow controlled means communicating the inlet end of the coil with said source of liquid nitrogen under pressure, said outlet end being free of gas flow restricting means for free venting of vaporized liquid nitrogen therefrom.
Claim 2
Dependent Claim 138 words
In combination with a source of liquid nitrogen under pressure, a housing including air inlet and air outlet openings and blower means operatively associated with the housing for pumping air through the housing and out the air outlet opening, at least one closed tank disposed within the housing for the passage of air being pumped through the housing in heat transfer relation with the outer surfaces of the tank, a quantity of eutectic solution disposed within the tank, and a coil of good heat transmitting material disposed within the tank and including inlet and outlet ends opening outwardly of the tank, fluid flow controlled means communicating the inlet end of the coil with said source of liquid nitrogen under pressure, said outlet end being free of gas flow restricting means for free venting of vaporized liquid nitrogen therefrom.
Claim 3
Dependent Claim 42 words
The combination of claim 1 wherein said housing is vertically elongated, provided with depending support legs and said air inlet opening is defined in the bottom of said housing, said air outlet opening being defined in an upper portion of said housing.
Claim 4
Dependent Claim 18 words
The combination of claim 2 wherein said tank is disposed within said housing below said air outlet opening.
Claim 5
Dependent Claim 17 words
The combination of claim 3 wherein said blower assembly is disposed within said housing above said tank.
Claim 6
Dependent Claim 85 words
The combination of claim 1 wherein a plurality of eutectic solution tanks are disposed within said housing and each of said tanks has a coil disposed therein having inlet and outlet ends opening outwardly of the tanks, the inlet ends of said coils opening into an inlet manifold within said housing into which a supply line opens, the inlet end of the supply line opening exteriorly of said housing, said fluid flow controlled means communicating said source with said inlet end of said supply line.

References Cited (Backward Citations)

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US2013848A Cited
US2560453A Cited
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US2607201A Cited
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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) 1977-11-18 1978-05-20 1978-11-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-11-18 1982-05-20 1982-11-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-11-18 1986-05-20 1986-11-19 $7700.00 Window Closed / Lapsed

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