Patents by Inventor Robert L. Eicher

Robert L. Eicher 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).

  • Magnetic proximity device
    Patent number: 4117431
    Abstract: A proximity device comprises a pair of connected magnets that are movable with respect to a magnetizable member located intermediate the magnets and secured in a housing. The magnets are arranged to provide a high rate of change of force between the magnets and the member as the magnets are moved by the approach or retreat of a magnetizable operator to or from an area adjacent one of the magnets and remote from the magnetizable member between the magnets.
    Type: Grant
    Filed: June 13, 1977
    Date of Patent: September 26, 1978
    Assignee: General Equipment & Manufacturing Co., Inc.
    Inventor: Robert L. Eicher