Patents by Inventor Helmut Gernandt

Helmut Gernandt 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).

  • Piston and seal assembly
    Patent number: 4326724
    Abstract: A one-piece piston is formed with an outwardly open annular groove by machining in which a piston ring is received sealingly relative to the wall of a cylinder. According to the invention the flanks of the ring and the groove are formed as frustocones at least on one side of the ring. A support ring or backup ring may be provided between the piston ring and the other groove flank. The piston ring can be composed in whole or in part of a nonmetallic material such as polytetrafluoroethylene.
    Type: Grant
    Filed: December 20, 1979
    Date of Patent: April 27, 1982
    Assignee: Linde Aktiengesellschaft
    Inventor: Helmut Gernandt
  • Apparatus for the detection of liquid components in gases for dry-running compressors
    Patent number: 4080593
    Abstract: A device for the detection of liquid components in gases, especially to detect the presence of liquids such as lubricants in gases subjected to compression in dry-running compressors, comprises an electric capacitor having a moisture-receptive dielectric with dielectric constant varying from a normal dielectric constant in the presence of the absorbed liquid. The capacitor is connected in a capacitance-detection circuit and can operate an alarm or the like.
    Type: Grant
    Filed: October 8, 1976
    Date of Patent: March 21, 1978
    Assignee: Linde Aktiengesellschaft
    Inventors: Helmut Gernandt, Heinz Heeg