Vernon E Shelton

US Patent:

49428497, Jul 24, 1990

Filed:

Apr 6, 1989

Appl. No.:

7/334580

Inventors:

Vernon E. Shelton - Tyler TX

International Classification:

F01P 714

US Classification:

123 411

Abstract:

A system for converting the failure mode of a motor vehicle type thermostat whereby a secondary cooling fluid passage, connected in parallel to the primary (thermostat-controlled) cooling fluid passage, is established. The by-pass valve means of the secondary passage is normally open and is closed only when the motor vehicle ignition is started. If the control for the primary passage malfunctions, a thermocoupler interrupts the circuit that holds said by-pass valve closed, thus allowing cooling fluid to flow through said secondary passage. A means for manually controlling the secondary passage valve is further disclosed.