Patents by Inventor Ken Kin-ho Lai

Ken Kin-ho Lai 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).

  • Operating method for fluid working machine
    Patent number: 8206125
    Abstract: A fluid working machine (1) has several working chambers (5) of cyclically changing volume. For pumping hydraulic fluid, the inlet and outlet valves (8, 9) are electrically actuated. The timing of the actuation of said electrically actuated valves (8, 9) is varied depending on the fluid flow demand.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: June 26, 2012
    Assignees: Sauer-Danfoss ApS, Artemis Intelligent Power Ltd.
    Inventors: Onno Kuttler, Ken Kin-ho Lai
  • Method of operating a fluid working machine
    Patent number: 8197224
    Abstract: To improve the fluid output flow characteristics (14) of a synthetically commutated hydraulic pump (1), it is suggested to use a plurality of different valve (10) actuation strategies. For every fluid flow demand region I to VI a certain actuation strategy is chosen.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: June 12, 2012
    Assignees: Sauer-Danfoss ApS, Artemis Intelligent Power Ltd.
    Inventors: Onno Kuttler, Ken Kin-ho Lai
  • Method of operating a fluid working machine
    Patent number: 8197223
    Abstract: When the fluid flow output of a synthetically commutated hydraulic pump is adapted to a given fluid flow demand, pulsations in the fluid output flow of the synthetically commutated hydraulic pump can occur. To avoid such pressure pulsations, it is suggested, to use a set of pre-calculated actuation patterns for actuating the electrically commutated valves of the synthetically commutated hydraulic pump.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: June 12, 2012
    Assignees: Sauer-Danfoss ApS, Artemis Intelligent Power Ltd.
    Inventors: Onno Kuttler, Ken Kin-ho Lai
  • Method of controlling a cyclically commutated hydraulic pump
    Patent number: 8192175
    Abstract: When employing synthetically commutated hydraulic pumps (1), a time delay between a change in fluid flow demand (15) and the resulting fluid flow output (13) can be observed. It is suggested to use a time evolvement function, taking into account the time evolvement of the fluid flow demand and/or the time evolvement of the pumping strokes, to modify the actuation of the electrically commutated valves.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: June 5, 2012
    Assignees: Sauer-Danfoss ApS, Artemis Intelligent Power Ltd.
    Inventors: Onno Kuttler, Ken Kin-ho Lai
  • METHOD OF OPERATING A FLUID WORKING MACHINE
    Publication number: 20100303638
    Abstract: When the fluid flow output of a synthetically commutated hydraulic pump is adapted to a given fluid flow demand, pulsations in the fluid output flow of the synthetically commutated hydraulic pump can occur. To avoid such pressure pulsations, it is suggested, to use a set of pre-calculated actuation patterns for actuating the electrically commutated valves of the synthetically commutated hydraulic pump.
    Type: Application
    Filed: October 29, 2008
    Publication date: December 2, 2010
    Applicant: Sauer-Danfoss Aps
    Inventors: Onno Kuttler, Ken Kin-ho Lai
  • OPERATING METHOD FOR FLUID WORKING MACHINE
    Publication number: 20100303657
    Abstract: A fluid working machine (1) has several working chambers (5) of cyclically changing volume. For pumping hydraulic fluid, the inlet and outlet valves (8, 9) are electrically actuated. The timing of the actuation of said electrically actuated valves (8, 9) is varied depending on the fluid flow demand.
    Type: Application
    Filed: October 29, 2008
    Publication date: December 2, 2010
    Applicant: SAUER-DANFOSS APS
    Inventors: Onno Kuttler, Ken Kin-ho Lai
  • METHOD OF OPERATING A FLUID WORKING MACHINE
    Publication number: 20100296948
    Abstract: To improve the fluid output flow characteristics (14) of a synthetically commutated hydraulic pump (1), it is suggested to use a plurality of different valve (10) actuation strategies. For every fluid flow demand region I to VI a certain actuation strategy is chosen.
    Type: Application
    Filed: October 29, 2008
    Publication date: November 25, 2010
    Applicant: Sauer-Danfoss ApS
    Inventors: Onno Kuttler, Ken Kin-ho Lai
  • METHOD OF CONTROLLING A CYCLICALLY COMMUTATED HYDRAULIC PUMP
    Publication number: 20090120086
    Abstract: When employing synthetically commutated hydraulic pumps (1), a time delay between a change in fluid flow demand (15) and the resulting fluid flow output (13) can be observed. It is suggested to use a time evolvement function, taking into account the time evolvement of the fluid flow demand and/or the time evolvement of the pumping strokes, to modify the actuation of the electrically commutated valves.
    Type: Application
    Filed: October 30, 2008
    Publication date: May 14, 2009
    Applicant: Sauer-Danfoss ApS
    Inventors: Onno Kuttler, Ken Kin-ho Lai