Apparatus for draining a cooling system

Details Apparatus for draining a cooling system Apparatus for draining a cooling system

1977-08-19

1978-11-21

Lazarus, Ronald H.

Internal-combustion engines

Cooling

System drained and/or heat-storing

137 62, F01P 1120

Patent

active

041261089

ABSTRACT:
The disclosure concerns apparatus for draining coolant from the liquid cooling system of a locomotive. The apparatus includes an automatic control which is armed upon shut-down of the engine and drains the cooling system upon the occurrence of freezing temperature conditions. The apparatus must be reset manually, and this requires two distinct manipulations, one of which effects override of the automatic control. Such override action is limited in duration to prevent inadvertent, prolonged disabling of the automatic control. The drain valve is a pilot operated, rotary plug valve. Preferably, the apparatus includes provisions for manually draining the cooling system, for effecting automatic draining by the combined effects of gravity and compressed air, and for providing visual indications of its operating state. Moreover, as far as practical, it is desirable to package the components in a unitary assembly which can be replaced easily and bench serviced and tested.

REFERENCES:
patent: 1786878 (1930-12-01), Van Keuren
patent: 1924250 (1933-08-01), McGuire
patent: 1924251 (1933-08-01), McGuire
patent: 2032670 (1936-03-01), Simmen
patent: 2408183 (1946-09-01), Wood
patent: 2597061 (1952-05-01), Burich
patent: 2688460 (1954-09-01), Borgerd
patent: 3621907 (1971-11-01), Ephraim
patent: 3648715 (1972-03-01), Boothe

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