US3733836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature controlled mobile cart
Assignee: MELBRO CORP
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Filing: 1972-01-17
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Granted: 1973-05-22
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Expires: 1992-01-17
Abstract
Abstract A mobile cart is provided with thermoelectric cooling means actuated by a circuit which provides for either external A. C. current input or integral D. C. current power supply. A cabinet is specially constructed to pass air through a finned heat sink for heat transfer purposes and through the controlled temperature container portion of the cart.
Inventors
- 👤 L Corini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:10
CPC Classifications
F; F25; F25D; F25D17/00; F25D17/04; F25D17/06; F25B; F25B21/00; F25B21/02; F25D11/00; F25D11/003; F25D2317/00; F25D2317/06; F25D2317/065; F25D2317/0651; F25D2317/066; F25D2317/0664; F25D2317/068; F25D2317/0683; F25D2400/00; F25D2400/10; F25D2400/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
400 words
A temperature controlled mobile cart adapted to provide controlled cooling within its interior, comprising: a. an insulated shell having an inner liner therein forming a container spaced therefrom to form an air passage; b. a first heat sink means within said air passage; c. fan means to circulate air through said container, air passage, and first heat sink means; d. cold shoe means comprising a separate block of heat conductive material having a first portion mounted in heat transfer relation to said first heat sink means; e. thermoelectric module means, having a first portion mounted in heat transfer relation to a second portion of said block of material; f. a second heat sink means mounted in heat transfer relation to a second portion of said module means; g. air flow means, having a fan for producing air flow and forming a channel which envelops said second heat sink means and directs air flow therethrough; h. integral D.C. power supply means, for providing a source of D.C. voltage to said thermoelectric means; i. A.C. input means adapted to connect to an external source of A.C. power; j. power converter means, connected to said A.C. input means, for converting A.C. to D.C. power, and having a D.C. voltage output connected to said thermoelectric module means; k. thermostat means for monitoring the temperature of said cart interior; l. switching means, having a switch operated by said thermostat means for maintaining D.C. voltage across said thermoelectric means when said cart interior is to be cooled and removing D.C. voltage from said module means when the temperature of said cart interior is below a predetermined temperature, and operative to hold said D.C. power supply voltage disconnected from said module means when said A.C. input means is connected to an external source of A.C. power; m. a charger circuit connected to said A.C. input means and providing a controlled D.C. voltage connected to said D.C. power supply means; n. an inverter circuit connected to the output of said converter means, for inverting D.C. power to A.C. power, and having an A.C. output con-nected to said fan means; and o. a low voltage detector means operatively connected to said battery when said A.C. input means is disconnected from said A.C. external source, and having an output connected to an audio alarm, for detecting when said battery voltage has dropped below a predetermined minimum and energizing said alarm.
Claim 2
Dependent Claim
400 words
A temperature controlled mobile cart adapted to provide controlled cooling within its interior, comprising: a. an insulated shell having an inner liner therein forming a container spaced therefrom to form an air passage; b. a first heat sink means within said air passage; c. fan means to circulate air through said container, air passage, and first heat sink means; d. cold shoe means comprising a separate block of heat conductive material having a first portion mounted in heat transfer relation to said first heat sink means; e. thermoelectric module means, having a first portion mounted in heat transfer relation to a second portion of said block of material; f. a second heat sink means mounted in heat transfer relation to a second portion of said module means; g. air flow means, having a fan for producing air flow and forming a channel which envelops said second heat sink means and directs air flow therethrough; h. integral D.C. power supply means, for providing a source of D.C. voltage to said thermoelectric means; i. A.C. input means adapted to connect to an external source of A.C. power; j. power converter means, connected to said A.C. input means, for converting A.C. to D.C. power, and having a D.C. voltage output connected to said thermoelectric module means; k. thermostat means for monitoring the temperature of said cart interior; l. switching means, having a switch operated by said thermostat means for maintaining D.C. voltage across said thermoelectric means when said cart interior is to be cooled and removing D.C. voltage from said module means when the temperature of said cart interior is below a predetermined temperature, and operative to hold said D.C. power supply voltage disconnected from said module means when said A.C. input means is connected to an external source of A.C. power; m. a charger circuit connected to said A.C. input means and providing a controlled D.C. voltage connected to said D.C. power supply means; n. an inverter circuit connected to the output of said converter means, for inverting D.C. power to A.C. power, and having an A.C. output con-nected to said fan means; and o. a low voltage detector means operatively connected to said battery when said A.C. input means is disconnected from said A.C. external source, and having an output connected to an audio alarm, for detecting when said battery voltage has dropped below a predetermined minimum and energizing said alarm.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |