Gas flow control

Details Gas flow control Gas flow control

2005-09-20

2005-09-20

Jacyna, J. Casimer (Department: 3751)

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

C251S030020, C251S061500, C137S100000

Reexamination Certificate

active

06945507

ABSTRACT:
A gas flow controller includes a control valve coupled for actuating a main valve. In one example embodiment, a gas flow controller includes a main valve and a servo valve operated by an actuator, said servo valve being used for controlling the opening of the main valve. The servo valve is implemented in a variety of manners, such as a three-way valve means or as a double two-way valve. The servo valve further communicates, via gas pipes, with a first gas chamber limited by a diaphragm being in operative connection with the main valve, as well as to a second gas chamber in the inlet area, and a third gas chamber in the outlet area.

REFERENCES:
patent: 3741710 (1973-06-01), Nelson
patent: 4615354 (1986-10-01), Bianchi
patent: 21 11 343 (1972-04-01), None
patent: 198 21 853 (1999-07-01), None
patent: 100 18 757 (2001-10-01), None
patent: 100 26 035 (2001-12-01), None
patent: 0 379 759 (1995-04-01), None
patent: 1 058 060 (2000-12-01), None

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