Patents by Inventor Harvard B. Kolm

Harvard B. Kolm 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).

  • Patent number: 4285363
    Abstract: A servovalve including a base, first and second flappers mounted on the base and attached to first and second armatures, respectively, first and second nozzles on the base for discharging fluid, third and fourth nozzles on said base for receiving fluid from the first and second nozzles, respectively, first and second springs for normally biasing the first and second flappers, respectively, into positions for effectively preventing flow of fluid from the first and second nozzles, torque motor structure including first and second coils operatively associated with the first and second armatures for simultaneously causing either one of said flappers to move away from its associated nozzle while the other flapper moves into a more closed relationship with its associated nozzle depending on the direction of current flow through said coils, and gain adjustment blocks mounted on the first and second armatures.
    Type: Grant
    Filed: November 5, 1979
    Date of Patent: August 25, 1981
    Assignee: Hydraulic Servocontrols Corporation
    Inventor: Harvard B. Kolm