Dense phase pump with open loop control

Details Dense phase pump with open loop control Dense phase pump with open loop control

2006-06-23

2010-06-08

Crawford, Gene (Department: 3651)

Conveyors: fluid current

Blower or pump having load intake opening in housing

Including load or blower protecting means

C406S011000, C406S014000, C406S197000

Reexamination Certificate

active

07731456

ABSTRACT:
A pump for particulate material includes a pump chamber wherein material flows into the pump chamber under negative pressure and flows out of the pump chamber under positive pressure. A plurality of pinch valves are provided to control flow of material into and out of the pump chamber. The pinch valves are operated independent of each other and of the pump cycle rate. A modular design of the pump is provided. A pump control feature is provided for air flow rate control during positive and negative pressure conditions.

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Search Report from European Patent No. 06019948, mailed Feb. 19, 2008, 12 pgs.
Co-pending U.S. Appl. No. 11/261,088, filed Oct. 28, 2005, and entitled: Powder Pump Flow Monitoring Method and System.

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