Gas flow control

Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface

Reexamination Certificate

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Details

C137S613000, C251S045000

Reexamination Certificate

active

06978798

ABSTRACT:
An approach for gas flow control is achieved with an arrangement involving a sealed housing with relatively few components. According to an example embodiment, a gas flow controller comprises a gas inlet, a gas outlet, and an auxiliary chamber including a partition wall that separates it from the gas inlet. By means of a differential pressure between the inlet and the auxiliary chamber, a valve arrangement is actuated through a diaphragm provided on the partition wall to control a flow from the gas inlet to the gas outlet. A servo pump2is provided on the partition wall and produces the differential pressure by pumping the gas from the auxiliary chamber to the gas inlet.

REFERENCES:
patent: 2417994 (1947-03-01), Sheets
patent: 3537475 (1970-11-01), Pottinger
patent: 3741710 (1973-06-01), Nelson
patent: 4744336 (1988-05-01), Miller
patent: 5899434 (1999-05-01), Nishimura
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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