Valves and valve actuation – Electrically actuated valve – Including solenoid
Patent
1996-05-01
1998-05-05
McMahon, Marguerite
Valves and valve actuation
Electrically actuated valve
Including solenoid
417466, F16K 3106
Patent
active
057464138
ABSTRACT:
A fluid metering valve adaptable for outputting a fixed volume of lubricating oil from a diesel engine into an engine fuel system includes a sleeve slidably disposed in a body and a piston valve slidably disposed within the sleeve. A spring resiliently biases the sleeve to a default position blocking communication between a chamber and an outlet and the piston valve to a default position communicating an inlet with the chamber. The default position of the sleeve is established by a annular member resiliently biased into engagement with the body by another spring while the default position of the piston valve is established by another annular member urged into engagement with the body by a third spring. Movement of the piston valve toward the chamber by an input force such as a force motor initially blocks communication between the inlet and the chamber and subsequently increases the fluid pressure in the chamber to a level sufficient for moving the sleeve away from the chamber to establish communication between the outlet so that continued movement of the piston valve outputs a fixed volume of fluid.
REFERENCES:
patent: 1479978 (1924-01-01), Bobrick et al.
patent: 1556149 (1925-10-01), Koppelman
patent: 1726402 (1929-08-01), Lurcott
patent: 3925988 (1975-12-01), Kelley
patent: 4522372 (1985-06-01), Yano
patent: 4869346 (1989-09-01), Nelson
patent: 5174336 (1992-12-01), Casey et al.
Burrows J. W.
Caterpillar Inc.
Grant John W.
McMahon Marguerite
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