Patents by Inventor Elwin De Valk

Elwin De Valk 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).

  • Shaving apparatus having contoured heads
    Patent number: 5544414
    Abstract: A shaving apparatus is provided having at least one shaving unit comprising an external shaving member (3) and an internal shaving member (4) which is rotatably drivable relative to the external shaving member, the external shaving member having an annular wall portion (5) with lamellae (7) which extend in substantially radial directions and between which hair-entry apertures are formed, the radial ends (13) of the lamellae having a rounding radius (R) of 0.3-0.7 mm viewed in a radial direction, and the internal shaving member (4) comprising cutters (9) having cutting edges (10) which describe a path (11) adjoining the inner side (12) of the annular wall portion (5) of the external shaving member.
    Type: Grant
    Filed: November 3, 1994
    Date of Patent: August 13, 1996
    Assignee: U.S. Philips Corporation
    Inventors: Jacobus N. Dekker, Elwin De Valk, Fred Fraij