Refrigerated semitrailer truck for long and local deliveries

Details Refrigerated semitrailer truck for long and local deliveries Refrigerated semitrailer truck for long and local deliveries

1975-08-22

1977-11-29

Capossela, Ronald C.

Refrigeration

Automatic control

With correlated manual or external operator and condition...

62239, 62332, 62514R, F25D 2900

Patent

active

040604004

ABSTRACT:
A refrigerated semitrailer truck for both long and local delivery of frozen foods in a hot environment is disclosed which utilizes both a liquid nitrogen unit and a mechanical refrigeration unit with an automatic control system. The system automatically turns the liquid nitrogen off when the temperature is above 30.degree. F., below -10.degree. F., or when an access door to the insulated truck is open. The liquid nitrogen also operates as a standby unit at all temperatures above -10.degree. F. in the event of a malfunction of the mechanical unit.

REFERENCES:
patent: 2479840 (1949-08-01), Johnson et al.
patent: 3127755 (1964-04-01), Hemery
patent: 3269133 (1966-08-01), Dixon
patent: 3287925 (1966-11-01), Kane et al.
patent: 3447334 (1969-06-01), Kimball
patent: 3507128 (1970-04-01), Murphy et al.

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