Method and apparatus for valve control

Details Method and apparatus for valve control Method and apparatus for valve control

2005-03-01

2005-03-01

Berhane, Adolf (Department: 2838)

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

C251S129010

Reexamination Certificate

active

06862165

ABSTRACT:
A valve control circuit in accordance with the invention comprises a direct current (DC) voltage source and a DC-DC step-up converter coupled with the DC voltage source. The circuit also comprises a programmable controller coupled with the DC-DC converter, a first valve control switch coupled with the DC source and the controller, and a first valve coupled with the first valve control switch. The circuit further comprises a valve-picking circuit coupled with the controller such that a current source of the valve-picking circuit is selectively coupled with the first valve control switch to open the first valve in response to electrical signals from the controller.

REFERENCES:
patent: 4700888 (1987-10-01), Samulak
patent: 4834284 (1989-05-01), Vandermeyden
patent: 6059195 (2000-05-01), Adams et al.
patent: 6158715 (2000-12-01), Kirschbaum
patent: 6701874 (2004-03-01), Schultz et al.
patent: 20020132202 (2002-09-01), Clifford

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