Patents by Inventor Leonardus H. M. Maaswinkel

Leonardus H. M. Maaswinkel 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).

  • Rotatable magnetic-head unit for a magnetic-tape apparatus
    Patent number: 4964008
    Abstract: A rotatable magnetic-head unit comprises a cylindrical drum with at least one magnetic head for recording and/or reproducing signals on/from a magnetic tape. This magnetic tape is wrapped around a part of the circumference of the drum and is moved past that part of the drum circumference. in order to obtain a stable bearing arrangement for the magnetic-head unit the magnetic head is fixedly connected to the drum, whose wall is supported by means of spiral-groove bearings in the direct proximity of the magnetic heads in a stationary cylindrical housing. The drum can rotate inside the housing. The housing is formed with an opening in which the magnetic tape moves.
    Type: Grant
    Filed: January 30, 1989
    Date of Patent: October 16, 1990
    Assignee: U.S. Philips Corporation
    Inventors: Budiman Sastra, Jacob G. Fijnvandraat, Leonardus H. M. Maaswinkel, Everhardus A. Muijderman