Patents by Inventor Rolf D. Hoppmanns

Rolf D. Hoppmanns 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: 4639801
    Abstract: A magnetic tape cassette apparatus has a holder into which a cassette can be pushed against an ejection slide, to a pushed-in position. A lifting device moves the holder from a position for receiving or ejecting a cassette, to an operating position. As the ejection slide is moved to the pushed-in position, a pivoting catch engages the slide to lock it and hold it during movement of the lifting device to the operating position. Upon reverse movement of the lifting device to a position for ejecting the cassette, a tilting lever engages a lug mounted to the apparatus frame, and pivots so as to pivot said catch and unlock the ejection slide. Ejection slides to each side of the holder may be interconnected by a rack and pinion arrangement having a brake for slowing rotation of the pinion shaft during ejection.
    Type: Grant
    Filed: July 9, 1984
    Date of Patent: January 27, 1987
    Assignee: U.S. Philips Corporation
    Inventors: Rolf D. Hoppmanns, Walter Steup, Willibald Wieczorek, Franz Beitler