Pumps – Expansible chamber type – Pumping member position controlled port
Patent
1978-04-03
1982-10-26
Cohan, Alan
Pumps
Expansible chamber type
Pumping member position controlled port
13762415, 417499, 251 57, F04B 704
Patent
active
043559611
ABSTRACT:
The invention comprises a control valve which is interposed between a hydraulically-operated fuel valve (for an engine) and a hydraulic fluid supply for regulating the operation (i.e, the opening and closing) of the fuel valve. The control valve has a housing-enclosed, sliding plunger which is spring-loaded to urge the plunger in a first direction in the housing, and which is translated in a second, opposite direction against the spring bias, by a contacting, rotating cam. Hydraulic fluid inlet and outlet ports are formed in the housing and are cyclically communicating and closed off from each other, for given periods of time, due to the translations of the plunger. The housing has an adjusting element operative for altering the translation of the plunger relative to the housing, to alter the given time periods and, as a consequence, the fuel valve is selectively and adjustably regulated thereby.
REFERENCES:
patent: 2378165 (1945-06-01), Waeber
patent: 2533097 (1950-12-01), Dale
patent: 3417702 (1968-12-01), Behm
Cohan Alan
Ingersoll-Rand Company
Murphy B. J.
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