Patents by Inventor Waldemar Wachowitz

Waldemar Wachowitz 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).

  • Shaft seal
    Patent number: 5143385
    Abstract: A shaft seal including a stiffening ring 1 and a lip ring 2 made of a polymeric material connected thereto. The lip ring 2 has a cylindrical surface 3 surrounding the shaft to be sealed about, i.e. shaft 5, in a very short distance and at least one retaining rib 4 projecting from said cylindrical surface towards the inside. The cylindrical surface 3, the retaining rib 4, and the shaft 5 surround capillary-active free spaces. The cylindrical surface rises above the retaining rib 4 on both sides in axial direction and the retaining rib 4 surrounds the shaft 5 on a sine-like course and continuously.
    Type: Grant
    Filed: January 31, 1992
    Date of Patent: September 1, 1992
    Assignee: Firma Carl Freudenberg
    Inventors: Stefan Sponagel, Waldemar Wachowitz