Pumps – Expansible chamber type – Having pumping chamber pressure responsive distributor
Patent
1979-06-13
1980-12-30
Freeh, William L.
Pumps
Expansible chamber type
Having pumping chamber pressure responsive distributor
417454, 417539, F04B 2102, F04B 3910
Patent
active
042420636
ABSTRACT:
A multi-cylinder pump for delivering fluids under high pressure which includes a multi-lobed camshaft having bearing supported yoke elements disposed in an oil-filled crankcase for coupling the camshaft to plural piston elements such that displacement of the plural piston elements occur in a desired phase relationship and improved sealing arrangements disposed between the piston and the cylinders, between the suction inlet port and the high pressure outlet port and between the cylinders and the oil-filled crankcase to prevent cross-contamination of the oil lubricant and the fluid being pumped and to prevent any substantial leakage between the high pressure outlet port and low pressure inlet port during the suction and pressure strokes of the pistons.
REFERENCES:
patent: 3413929 (1968-12-01), Cook et al.
patent: 3431865 (1969-03-01), Cook et al.
patent: 3666382 (1972-05-01), Rasmussen
patent: 3746483 (1973-07-01), Headel
patent: 4032263 (1977-06-01), Pareja
Freeh William L.
Haugen Orrin M.
Lear Siegler, Inc.
Nikolai Thomas J.
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