Patents by Inventor Hans-Guenter Stueber

Hans-Guenter Stueber 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).

  • Bearings for use in negative-pressure environments
    Patent number: 5069603
    Abstract: A vacuum pump includes a rotor and at least one bearing that is supplied with a lubricant and that is situated, during operation, in a negative-pressure environment. In order to extend the useful life of the bearing, it is proposed that the bearing is formed from a ceramic material.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: December 3, 1991
    Assignee: Leybold Aktiengesellschaft
    Inventors: Guenter Schuetz, Hans-Guenter Stueber, Volker Kinzig
  • Bearings for use in negative-pressure environments
    Patent number: 5028219
    Abstract: A vacuum pump includes a rotor and at least one bearing that is supplied with a lubricant and that is situated, during operation, in a negative-pressure environment. In order to extend the useful life of the bearing, it is proposed that the bearing is formed from a ceramic material.
    Type: Grant
    Filed: August 21, 1989
    Date of Patent: July 2, 1991
    Assignee: Leybold Aktiengesellschaft
    Inventors: Guenter Schuetz, Hans-Guenter Stueber, Volker Kinzig
  • Pump stage for a high-vacuum pump
    Patent number: 4978276
    Abstract: A high-vacuum pump includes a plurality of pump stages, each of which has a rotor and a stator. In one of the pump stages, either the rotor or the stator is provided with a structure that effects the gas conveying includes radially extending webs whose pitch and width decrease from the suction side of the pump stage to the thrust side of the pump stage.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: December 18, 1990
    Assignee: Leybold Aktiengesellschaft
    Inventors: Hans-Peter Kabelitz, Winfried Kaiser, Hans-Guenter Stueber