Patents by Inventor Harmut Schappler

Harmut Schappler 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: 5782541
    Abstract: A process and an apparatus for pressure control, in particular, to adjust braking pressures in a utility vehicle, are proposed. Two individual controllers (10, 11) are assigned respectively to an inlet valve (2) and to a discharge valve (3). A pilot control value consisting of a fixed value y.sub.v and of a memorized value .DELTA.y.sub.v is additively input to the output values of these controllers. The memorized components .DELTA.y.sub.v are the integration result of the I (integration) components of the individual controllers (10, 11) for the duration of a pressure increase (inlet valve) or pressure decrease (discharge valve). The memorizing process is ended after approximately five to ten brake applications and the value of .DELTA.y.sub.v which is then reached is used as an individual pilot control value.
    Type: Grant
    Filed: August 9, 1995
    Date of Patent: July 21, 1998
    Assignee: Wabco Vermogensverwaltung GmbH
    Inventor: Harmut Schappler