Hydraulic cylinder provided with a seal-less piston

Details Hydraulic cylinder provided with a seal-less piston Hydraulic cylinder provided with a seal-less piston

1989-04-19

1990-07-17

Garrett, Robert E.

Power plants

Pressure fluid source and motor

Pulsator

92168, 921691, 921701, B60T 11236

Patent

active

049413236

ABSTRACT:
A hydraulic cylinder having an internal groove in which is disposed a seal member peripherally engaging a seal-less reciprocable piston. In one form, the hydraulic cylinder is a master cylinder having a valved port in fluid communication with a source of fluid, opening and closing of the port being effected by a reciprocable plunger mounted on the end of the piston. An outlet port and a conduit places the chamber of the master cylinder in fluid communication with the chamber of the slave cylinder. In a slave cylinder version, a single port places the pressure chamber of the slave cylinder in communication with the master cylinder for introducing fluid and withdrawing fluid into and from the slave cylinder chamber, and thereby reciprocating the slave cylinder piston.

REFERENCES:
patent: 2242096 (1941-05-01), Thomas
patent: 3156097 (1964-11-01), Brown
patent: 3266383 (1966-08-01), Cairns
patent: 3312149 (1967-04-01), Fleckenstein et al.
patent: 4455832 (1984-06-01), Gaiser
patent: 4474005 (1984-10-01), Steer
patent: 4495772 (1985-01-01), Furuta
patent: 4505112 (1985-03-01), Nakamura
patent: 4514982 (1985-05-01), Bach
patent: 4528895 (1985-07-01), Nakamura
patent: 4557110 (1985-12-01), Price
patent: 4631924 (1986-12-01), Lowe
patent: 4671065 (1987-06-01), Ishiwata

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