Pumps – Motor driven – Fluid motor
Patent
1986-07-11
1988-10-11
Croyle, Carlton R.
Pumps
Motor driven
Fluid motor
417388, 60588, 60593, F04B 908, F04B 3500
Patent
active
047767740
ABSTRACT:
In a hydraulic double-acting hydropneumatic pressure multiplying device suited for generating hydraulic pressure, and comprising a cylinder within which a piston is slidably mounted. The multiplying device is capable of generating hydraulic pressure in both the backward and forward strokes of the piston within the cylinder. For this purpose, the cylinder is closed at the bottom by a lower cap having an upwardly extending plunger received within a portion extending upwardly from the piston. The cylinder also provides an upper cap with a dome and the upwardly extending portion of the piston is reciprocating within this dome, thus defining between the portion of the piston and the dome a first pressure generating chamber, and within the upwardly extending portion of the piston and the plunger of the lower cap a second pressure generating chamber for obtaining hydraulic pressure in both of the strokes of the piston. Conduits and valves are also supplied for compensating the volumetrical variations in the respective chambers.
REFERENCES:
patent: 3174432 (1965-03-01), Eickmann
patent: 3306042 (1967-02-01), Crooks
patent: 3713755 (1973-01-01), Scheffer
patent: 3790310 (1974-02-01), Whelan
patent: 3839866 (1974-10-01), Seidel
Croyle Carlton R.
Obee Jane E.
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