Jack-pump device

Details Jack-pump device Jack-pump device

1976-02-24

1977-03-08

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Selective or simultaneous power and manual energy inputs

60473, 60475, 60477, 60481, F15B 1309

Patent

active

040106098

ABSTRACT:
The invention relates to improved jack-pump devices comprising a pump with a sliding piston forming first and second pump chambers, one on each side, a jack with a sliding piston forming first and second jack-chambers, one on each side, a first valve between the pump chambers, acting unidirectionally from the second to the first pump chambers, a second valve between the first chambers of the pump and the jack, and a communication device between the second chambers of the pump and the jack, the pump and jack pistons being slidably mounted and axially aligned in the same body filled with fluid, a fixed transverse partition disposed in the cylinder body between the two pistons, and a plunger for compensating variations of volume, slidably mounted in one of the two second chambers, close to the corresponding extremity of the body.
The main application is as a lifting device for regulating the height of members or parts of moving machines, of seats for chairs, vehicles, building stays, etc.

REFERENCES:
patent: 302070 (1884-07-01), Watson
patent: 2473694 (1949-06-01), Renick
patent: 2563912 (1951-08-01), Belinkin

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