Internal-combustion engines – Cooling – System drained and/or heat-storing
Patent
1995-08-31
1997-05-13
Kamen, Noah P.
Internal-combustion engines
Cooling
System drained and/or heat-storing
440 88, 137 62, F01P 1102
Patent
active
056282850
ABSTRACT:
A drain valve assembly for automatically draining water from a cooling system of an inboard marine engine when the ambient temperature drops to a preselected value. The drain valve includes a cup-shaped base having a group of inlets connected to portions of a cooling system of the engine to be drained, and the open end of the base is enclosed by a cover. Each inlet defines a valve seat and a sealing piston is mounted for movement in the base and includes a series of valve members that are adapted to engage the valve seats. An outlet is provided in the sidewall of the cup-shaped base. The valve members on the sealing piston are biased to a closed position by a coil spring and a temperature responsive element interconnects the sealing piston with the cover. The temperature responsive element is characterized by the ability to exert a force in excess of the spring force of the coil spring when the ambient temperature is above about 50.degree. F., to thereby maintain the valve members in the closed position. When the temperature falls below the selected temperature, the temperature responsive element will retract, thereby permitting the valve members to be opened under the influence of the spring to automatically drain water from the cooling system of the engine.
REFERENCES:
patent: 4082068 (1978-04-01), Hale
patent: 4541448 (1985-09-01), Kolze
patent: 4693690 (1987-09-01), Henderson
patent: 4758190 (1988-07-01), Van Buren
"Dole Freeze Protection Valve", Easton Corporation.
Axton Terry D.
Erickson James E.
Gruenwald David J.
Hughes William E.
Jaeger Matthew W.
Brunswick Corporation
Kamen Noah P.
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