Patents by Inventor Martin Zetterquist

Martin Zetterquist 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).

  • Method for shutting off a pump as well as pump station arrangement
    Patent number: 10393122
    Abstract: A pump station arrangement and a method for turning off a pump configured for pumping liquid via a conduit. The pump, before being turned off, being driven at an operational frequency (FN) by a control unit. The method is characterized by the steps of, ramping down the frequency of the pump due to a turn off instruction, the terminal frequency of the ramping down being equal to the operational frequency (FN) of the pump minus at least 10 Hz and the ramping down time being at least a reflection time (TR) for the conduit in question, and the terminal frequency of the ramping down not being less than 10 Hz, and stopping the pump after the ramping down.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: August 27, 2019
    Assignee: XYLEM EUROPE GMBH
    Inventors: Martin Larsson, Jürgen Mökander, Martin Zetterquist
  • METHOD FOR SHUTTING OFF A PUMP AS WELL AS PUMP STATION ARRANGEMENT
    Publication number: 20170138363
    Abstract: A pump station arrangement and a method for turning off a pump configured for pumping liquid via a conduit. The pump, before being turned off, being driven at an operational frequency (FN) by a control unit. The method is characterized by the steps of, ramping down the frequency of the pump due to a turn off instruction, the terminal frequency of the ramping down being equal to the operational frequency (FN) of the pump minus at least 10 Hz and the ramping down time being at least a reflection time (TR) for the conduit in question, and the terminal frequency of the ramping down not being less than 10 Hz, and stopping the pump after the ramping down.
    Type: Application
    Filed: June 15, 2015
    Publication date: May 18, 2017
    Applicant: XYLEM IP MANAGEMENT S.À.R.L.
    Inventors: Martin Larsson, Jürgen Mökander, Martin Zetterquist