Continuous liquid flow system

Details Continuous liquid flow system Continuous liquid flow system

2005-01-11

2005-01-11

Yu, Justine R. (Department: 3746)

Pumps

Successive stages

Prior stage delivers to atmospheric chamber

C417S043000, C417S037000, C222S056000, C222S071000

Reexamination Certificate

active

06840744

ABSTRACT:
A system for continuous delivery of a measured flow of liquid to a processing apparatus includes a reservoir for holding a bulk supply of the liquid and an intermediate vessel. A first pump delivers liquid from the intermediate vessel to processing equipment at one rate. A second pump delivers liquid from the reservoir to the intermediate vessel at a second much faster rate. A monitor device continuously monitors the weight of the vessel and controls the first pump accordingly to deliver the required weight of liquid at the required rate to the processing equipment. The monitoring device determines when the weight of liquid in the intermediate vessel has reached a minimum position to initiate operation of the second pump to refill to vessel and a further device terminates operation of the second pump when the liquid level in the vessel reaches a maximum position.

REFERENCES:
patent: 3128782 (1964-04-01), Limpert et al.
patent: 3252618 (1966-05-01), Anderson et al.
patent: 3836285 (1974-09-01), Purtell
patent: 5316444 (1994-05-01), Wicnienski
patent: 5402670 (1995-04-01), Wicnienski
patent: 0 662 844 (1998-03-01), None
patent: 2 354 443 (2001-03-01), None
patent: 10-104046 (1998-04-01), None
patent: WO 9407544 (1994-04-01), None

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