Internal-combustion engines – Lubricators – Crankcase – pressure control
Patent
1976-06-25
1978-08-22
Lazarus, Ronald H.
Internal-combustion engines
Lubricators
Crankcase, pressure control
251122, 13750541, F01M 100
Patent
active
041081340
ABSTRACT:
A modulator valve assembly comprising a valve body having a first compartment area at one end thereof and an elongated bore extending therethrough from the inner end of the first compartment area. The first compartment area is closed by an inlet cap which is in operative communication with a source of fluid under pressure. A piston is slidably mounted in the bore and is provided with a pair of spaced-apart metering slots formed in the periphery thereof which extend between one end thereof and a reduced diameter portion. The valve body is provided with a discharge port formed therein which communicates with the bore intermediate the ends thereof. A spring is mounted in the bore to yieldably urge the piston towards the inlet cap so that the metering slots permit fluid to pass from the first compartment area to the discharge port. Means is provided in the port to limit the movement of the piston in one direction. An adjustment cap is threadably mounted on the valve body and may be selectively rotated with respect thereto to permit the tension in the spring to be varied.
REFERENCES:
patent: 1156608 (1915-10-01), Marmon
patent: 1929108 (1933-10-01), Berry
patent: 3127879 (1964-04-01), Giacosa
patent: 3187775 (1965-06-01), Pinnell
patent: 3782858 (1974-01-01), Peters
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