Engine coolant thermostat with overtemperature protection

Details Engine coolant thermostat with overtemperature protection Engine coolant thermostat with overtemperature protection

1998-04-30

1999-10-05

Tapolcal, William E.

Automatic temperature and humidity regulation

Cooling radiator

Bypass

236 93A, F01P 716

Patent

active

059610379

ABSTRACT:
An engine coolant thermostat of the type having a thermally expansible wax power element acting against a diaphragm and piston to move a poppet. The poppet has a retainer attached thereto which has portions sliding in slots on the thermostat housing; and these portions contact the ends of the slots to limit piston travel in the event of exposure to overtemperature and prevent failure of the thermostat.

REFERENCES:
patent: 2692731 (1954-10-01), Farrar
patent: 2847165 (1958-08-01), Freismuth
patent: 2873070 (1959-02-01), Drapeau
patent: 2981477 (1961-04-01), Salmon
patent: 4562953 (1986-01-01), Duprez et al.
patent: 5018664 (1991-05-01), Butler

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