Patents by Inventor Steve Jon Kalfsbeck

Steve Jon Kalfsbeck 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: 6092784
    Abstract: A coil assembly for miniature solenoid valves, such as size SAE-6 valves, includes a flux tube which passes through the hollow core of the coil assembly. The flux tube is formed against a shoulder of a coupling member by using the "Tammel" orbital head forming technique in which a forming tube orbits around the end of the flux tube to form a flange which bears against the shoulder. A flux washer is disposed adjacent the coil and is held tightly thereagainst by the flux tube to help linearize magnetic force exerted upon energizing the coil. In order to facilitate stroking and destroking the solenoid valve, the tank ports close slightly before the pressure ports are opened when stroking and slightly after when destroking. The coil is designed to saturate the magnetic circuit early to diminish the effect of coil heating and resultant force loss at a given stroke displacement.
    Type: Grant
    Filed: December 30, 1997
    Date of Patent: July 25, 2000
    Assignee: Dana Corporation
    Inventor: Steve Jon Kalfsbeck