Patents by Inventor Rolf Prox

Rolf Prox 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).

  • Proximity sensing head
    Patent number: 4408159
    Abstract: A proximity sensor includes a housing having one compartment which houses the components of an oscillator control circuit and another compartment which houses a sensing head including a ferrite core and oscillator coil assembly. An end cap closes the open end of the sensing head compartment. A fluid passage is provided in the end cap which permits fluid to flow around the oscillator coil assembly. A relatively thick seal assembly is interposed between the one compartment and the oscillator coil assembly to prevent the passage of fluid into the one compartment.
    Type: Grant
    Filed: April 2, 1981
    Date of Patent: October 4, 1983
    Assignee: Abex Corporation
    Inventor: Rolf Prox