Pumps – Intensifier
Patent
1979-12-06
1982-08-10
Gluck, Richard E.
Pumps
Intensifier
417391, 417403, F04B 1700
Patent
active
043435955
ABSTRACT:
A hydraulic actuated pressure booster unit includes a differential power piston and an integral control valve controlling the pumping direction and action. The control valve has a reciprocally mounted tubular spool member in a cylindrical valve body. The spool member has a control passageway and a plurality of spaced spools, one of which mates with the power piston passage to form a first valve for transfer of oil to the pumping chamber and from a transfer chamber to an exhaust passageway. A pair of spaced spools slide in stepped control chamber forming a control bore and exhaust bore connected by the spool passageway to the pumping chamber via the first valve. A sequence valve connects the exhaust bore to the exhaust through a directional control valve. The sequence valve is controlled by the output working pressure. A pilot valve controls the load connection to the one end of the cylinder and a high pressure relief valve limits the total pressure created within the working system. The valves and operating sections are axially mounted in longitudinal spacing within a tubular housing having fluid passages formed by recesses in the sidewalls and sealed by an outer shell.
REFERENCES:
patent: 2424332 (1947-07-01), Rose
patent: 2652780 (1953-09-01), Adams
patent: 2708412 (1955-05-01), Mueller
patent: 2787223 (1957-04-01), Sargent
patent: 2826149 (1958-03-01), Wrigley
patent: 3333425 (1967-08-01), Hemard
patent: 3440967 (1969-04-01), Pennther
patent: 3775028 (1973-11-01), Davis
Johnson Allen M.
Wells David L.
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