Pumps – Three or more cylinders arranged in parallel – radial – or... – Condition responsive fluid control
Patent
1980-03-07
1982-05-11
Freeh, William L.
Pumps
Three or more cylinders arranged in parallel, radial, or...
Condition responsive fluid control
F04B 118
Patent
active
043291210
ABSTRACT:
A hand operated tool comprising a cylinder with a drive piston therein operative to drive the cylinder to deliver a substantial lineal force. The piston has a large, tubular piston rod which functions also as a reservoir for the hydraulic fluid. A plurality of oil passages bored through the drive piston have small pump pistons reciprocable therein to receive on each return stroke a quantity of fluid from the self-contained reservoir to be delivered on the pump stroke to the other side of the drive piston. A wobble plate is mounted on the drive piston to drive the small pump pistons by tilting against them. A motor carried on the trailing end of the tubular piston rod rotates a shaft to drive a wheel carrying tapered pressure rollers around the wobble disc, tilting it against the pump pistons in circumferential sequence.
REFERENCES:
patent: 2913911 (1959-11-01), Gilkey
patent: 3129702 (1964-04-01), Arbanas
patent: 3296976 (1967-01-01), Soefers
Freeh William L.
Stidham Melvin R.
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