Patents by Inventor Walter J. Woodcock, Jr.

Walter J. Woodcock, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Control algorithm of variable speed pumping system
    Patent number: 8019479
    Abstract: A pumping system includes a pump for moving water. In one aspect, this is in connection with performance of an operation. The system includes a variable speed motor operatively connected to drive the pump. A value indicative of flow rate of water is determined and the motor is controlled to adjust the flow rate indicative value toward a constant. A value indicative of flow pressure is determined and the motor is controlled to adjust the flow pressure indicative value toward a constant. A selection is made between flow rate control and flow pressure control. In another aspect, the pump is controlled to perform a first operation, and is operated to perform a second water operation. Control of operation of the pump to perform the first water operation is altered in response to operation of the pump to perform the second operation.
    Type: Grant
    Filed: November 23, 2005
    Date of Patent: September 13, 2011
    Assignee: Pentair Water Pool and Spa, Inc.
    Inventors: Robert W. Stiles, Lars Hoffmann Berthelsen, Ronald B. Robol, Christopher R. Yahnker, Everett Cox, Donald Steen, Kevin Murphy, Walter J. Woodcock, Jr., Daniel J. Hruby, Peter Westermann-Rasmussen, Gert Kjaer, Einar Kjartan Runarsson, Arne Fink Hansen, Alberto Morando, Florin Lungeanu, Nils-Ole Harvest