Fluid flow control valves

Details Fluid flow control valves Fluid flow control valves

2006-04-11

2006-04-11

Hepperle, Stephen M. (Department: 3753)

Fluid handling

Systems

Supply and exhaust

C137S271000, C137S884000

Reexamination Certificate

active

07025090

ABSTRACT:
A fluid flow control valve system has a plurality of pairs of 3 port, 2 position (3/2) control valves (6, 6′) each valve being movable between its two positions by a pair of electrically-operable actuators (1, 2). A logic controller selectively generates electrical control signals for independently controlling operation of the pairs of 3/2 control valves, and a circuit means (11) is associated with each 3/2 control valve pair (6, 6′) to receive the control signals and provide electrical outputs to eit actuators (1, 2) of each 3/2 control valve of each pair. Variable switch means (14) forming part of the circuit means (11) pr the actuators (1, 2) to which the output is applied. Varying the switch means (14) programmes the fluid output mode of each 3/2 control valve pair to provide any one of a number of different effective valve types.

REFERENCES:
patent: 6397880 (2002-06-01), Stoll et al.
patent: 6715400 (2004-04-01), Muth et al.
patent: 29810091 (1999-01-01), None
patent: 0955473 (1999-11-01), None
patent: 2301167 (1996-11-01), None

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