Automatically actuatable fan clutch, in particular for cooling s

Details Automatically actuatable fan clutch, in particular for cooling s Automatically actuatable fan clutch, in particular for cooling s

1976-08-02

1978-03-28

Herrmann, Allan D.

192 clutches and power-stop control

Clutches

Operators

123 4112, 123 4116, 192 88A, F16D 2504, F16D 4325

Patent

active

040810666

ABSTRACT:
A fan for a cooling system in an internal combustion engine. The fan has a friction clutch therein which is engageable in response to a predetermined elevated temperature of air passing over a thermostat. The thermostat rotates with the fan. The thermostat is composed of an annular container filled with a liquid having a boiling point which is approximately in the temperature range at which the fan is to become engaged. One wall of the container is movable and forms a part of the friction clutch. The pressure of the liquid in the container is insufficient to effect an engagement of the friction clutch. However, when the temperature is elevated to a point whereat the liquid begins to boil, a gas pressure develops in the container and the gas pressure is sufficient to move the wall of the container to effect an engagement of the friction clutch and, as a result, a driving of the fan.

REFERENCES:
patent: RE24157 (1956-05-01), Johnson
patent: 1233518 (1917-07-01), Snyder
patent: 2005468 (1935-06-01), Modine
patent: 2734493 (1956-02-01), Findley
patent: 3075691 (1963-01-01), Kelley
patent: 3311205 (1967-03-01), Suppes et al.
patent: 3483855 (1969-12-01), Thoma
patent: 3505982 (1970-04-01), Walter et al.
patent: 3527329 (1970-09-01), Jordan

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