Patents by Inventor Ernst M. von Arndt

Ernst M. von Arndt 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 with multi-slitted sleeve
    Patent number: 4334687
    Abstract: A shaft seal for preventing leakage from a gap between a bore hole in a machine housing and a rotating shaft is disclosed. The seal consists of a contact pressure ring of elastic material and a multi-slitted, thin sleeve of polytetrafluoroethylene which is permanently joined to the inner wall of the ring.
    Type: Grant
    Filed: November 20, 1980
    Date of Patent: June 15, 1982
    Assignee: Firma Carl Freudenberg
    Inventors: Helmut Holzer, Ernst M. von Arndt
  • Two part shaft sealing ring
    Patent number: 4298203
    Abstract: A two part ring for sealing a shaft against solid, liquid or gas leakage is disclosed. The outer part is a stiffening ring which has a circular projection as its inside diameter surface. The inner part is a lip ring having a circular, concentric slot in its back end face. The projection fits into the slot to concentrically mate the lip and stiffening rings.
    Type: Grant
    Filed: November 18, 1980
    Date of Patent: November 3, 1981
    Assignee: Firma Carl Freudenberg
    Inventors: Helmut Holzer, Ernst M. von Arndt