Apparatus for draining a cooling system

Fluid handling – Freeze condition responsive safety systems – Low temperature responsive drains

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Details

251 14, 251 30, 251 58, F16K 31143, F01P 1120

Patent

active

042313848

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), VanKeuren
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
patent: 3650506 (1972-03-01), Bruton
patent: 3837616 (1974-09-01), Castriota-Scanderbeg

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