Fluid controlled switching unit

Details Fluid controlled switching unit Fluid controlled switching unit

1998-03-16

2000-07-04

Nguyen, Hoang

Motors: expansible chamber type

Working member position responsive motive fluid control

91397, 91465, F15B 1520

Patent

active

060822430

ABSTRACT:
A fluid controlled switching unit includes a valve block; a guide bore provided in the valve block; first and second work chambers provided in the valve block and spaced from one another; first and second cylinder bores provided in the valve body; and a plunger rod guided in the guide bore for reciprocating motion therein along a displacement path. The plunger rod has first and second piston faces situated in the first and second work chambers, respectively, and exposed to fluid pressure prevailing therein. The first and second piston faces move in the first and second cylinder bores, respectively. A valve body is attached to the plunger rod for forming a unitary structure therewith. The valve body has opposite pressure faces as well as first and second opposite end positions determining opposite ends of the displacement path. The valve body, when situated in one of the end positions, is exposed solely unilaterally to fluid pressure at one of the pressure faces thereof. There are further provided a pressurized fluid supply, a depressurized fluid return and a switch-over valve for alternatingly coupling the first and second work chambers to the pressurized fluid supply and the depressurized fluid return for effecting the reciprocating motion.

REFERENCES:
patent: 5193495 (1993-03-01), Wood, III
patent: 5529030 (1996-06-01), Rose
patent: 5531192 (1996-07-01), Feucht et al.
patent: 5595148 (1997-01-01), Letsche et al.

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