The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 23, 1997
Filed:
Nov. 07, 1996
Romuald Martin Jurewicz, St. Louis Park, MN (US);
Herman H Viegas, Bloomington, MN (US);
Thermo King Corporation, Minneapolis, MN (US);
Abstract
A control system is provided for a cryogenic refrigeration system having an evaporator-heater coil, an electronically controlled valve for regulating the amount of cryogenic gas to the coil, and a vapor motor powered by the cryogenic gas that drives both an alternator for recharging the system battery, and a fan for generating an air flow through the coil and into a conditioned space. The control system includes a temperature sensor for generating an electrical signal indicative of the temperature of the conditioned space, and a microprocessor that is electrically connected to the temperature sensor, the alternator, and the electronically controlled valve for modulating the flow of cryogenic gas through the evaporator-heater coil in said vapor motor to achieve a selected set point temperature in the conditioned space, and to maintain a sufficient alternator current to effectively recharge the system battery.