Pumps – Condition responsive control of pump drive motor – With condition responsive control of pump fluid valve
Reexamination Certificate
2005-09-13
2010-11-09
Kramer, Devon C (Department: 3746)
Pumps
Condition responsive control of pump drive motor
With condition responsive control of pump fluid valve
Reexamination Certificate
active
07828527
ABSTRACT:
A paint circulating system is suitable for providing paint to applicators in a product finishing facility. The system includes a pump for pumping paint around the system and a back-pressure regulator (BPR), which substantially eliminates pressure fluctuations of paint in the system upstream of the BPR. A controller is provided for controlling the pump and the BPR to operate in one of a flow mode, wherein a required flow rate of paint around the system is maintained, and a pressure mode, wherein a pressure of paint between the pump and the BPR is maintained. The paint circulating method includes switching operation of the pump and the BPR between the flow mode and the pressure mode.
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Search report dated Nov. 24, 2006 for PCT/US2006/030176.
Xu and Koelling, “Development of a Closed Loop Paint Circulation System for Non-Ne
Smith Alan A.
Thomas Michael A.
Wood Nigel C.
Bobish Christopher
Fletcher Yoder
Illinois Tool Works Inc.
Kramer Devon C
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