Pneumatic drive device

Details Pneumatic drive device Pneumatic drive device

1996-05-07

1997-10-14

Nguyen, Hoang

Motors: expansible chamber type

Cyclically operable

Working member controlled motive fluid for distributor motor

91316, 91327, 91329, 91348, F01L 2502, F01L 3100

Patent

active

056760337

ABSTRACT:
There is disclosed a pneumatic driving device having a cylindrical housing in which a piston element is axially displaceable. The piston element has at its ends a front piston and a rear piston which are connected to each other by a connecting pipe. A switch element is mounted in the housing between the pistons and defines a variable front chamber with the front piston and a variable rear chamber with the rear piston. Two inlet openings acted on by pressure are formed in the housing and can be connected with the front and rear chambers respectively. The switch element, in a first position, frees the inlet opening to the rear chamber so that the rear piston travels axially outward and the front piston axially inward and, in a second position, frees the inlet opening to the front chamber so that the front piston moves axially outward and the rear piston axially inward. The inwardly moving pistons reverse the switch element between the two positions.

REFERENCES:
patent: 2818022 (1957-12-01), Kangas
patent: 3606818 (1971-09-01), Hirn
patent: 4033134 (1977-07-01), Bentley
patent: 4174928 (1979-11-01), Austin
patent: 4364303 (1982-12-01), Sumida
patent: 4759260 (1988-07-01), Lew
patent: 5470209 (1995-11-01), Hartley et al.

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