Piston unit

Details Piston unit Piston unit

1979-06-11

1982-08-03

Witkowski, S. J.

Electricity: circuit makers and breakers

Retarded

Dashpot

200 83A, 200 83J, 200 83Q, 200 83T, 267114, 267124, 267 8R, 188282, 18832217, 188298, H01H 703, H01H 3538

Patent

active

043428843

ABSTRACT:
A small-sized differential piston unit is disclosed. The piston unit has a cylinder filled with liquid medium and a piston slideably mounted in the cylinder. An operation rod is operatively connected to said piston. An improved sealing member consisting of a membrane is used to completely seal the liquid medium in the cylinder. Control means is provided for imparting fluid resistance caused by the liquid medium to the piston differently between its forward movement and backward movement in the cylinder.

REFERENCES:
patent: 1152433 (1915-09-01), Murphy
patent: 2562286 (1951-07-01), Wall
patent: 2881285 (1959-04-01), Bank
patent: 2950499 (1960-08-01), Schlage
patent: 3639711 (1972-02-01), Jordan et al.
patent: 3711222 (1973-01-01), Hartley
patent: 3789949 (1974-02-01), Bortfield et al.
patent: 3839609 (1974-10-01), Prjpers

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