Pumps – Motor driven – Fluid motor
Patent
1998-06-04
2000-05-16
Bennett, Henry
Pumps
Motor driven
Fluid motor
417401, F04B 1700
Patent
active
060628286
ABSTRACT:
A compressor that uses liquefied gas at high pressure as a hydraulic medium for compressing gas from low pressure to high pressure. The compressor comprises a central liquid cylinder and two gas cylinders disposed adjacent opposite ends of the liquid cylinder that are axially aligned therewith. A piston assembly is disposed within the cylinders that comprises a central liquid drive piston and two compression pistons that are free to slide within the respective liquid and gas cylinders. A low pressure gas manifold coupled to the piston assembly, and a liquid-gas manifold coupled to opposite ends of the piston assembly. A liquid switching valve having a first port comprising a high pressure liquid inlet, a second port coupled to an inlet of the central liquid cylinder, a third port coupled to an outlet of the central liquid cylinder, and a fourth port coupled to the liquid-gas manifold. Limit switches disposed at opposite ends of the piston assembly that are coupled to the liquid switching valve and cause the switching valve to rotate as a function of movement of the piston assembly.
REFERENCES:
patent: 2938465 (1960-05-01), Mcfarland et al.
patent: 3249289 (1966-05-01), Maglott
patent: 3771912 (1973-11-01), Conlee
patent: 3776665 (1973-12-01), Dalton
patent: 3779671 (1973-12-01), Lybecker et al.
Alkov Leonard A.
Bennett Henry
Boles Derek S.
Lenzen, Jr. Glenn H.
Raufer Colin M.
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