Patents by Inventor Jack M. Meyer

Jack M. Meyer 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).

  • Sealing manhole cover for use on existing unsealed sanitary sewer manhole cover frames
    Patent number: 4101236
    Abstract: A manhole cover having no openings is provided with a blind pocket for insertion of a lifting tool and has a rectangular O-ring groove in the lower surface to receive a circular O-ring. The groove is so located as to cause the O-ring to engage the flat bearing surface of a conventional manhole cover frame. A complete seal against storm water is afforded.
    Type: Grant
    Filed: June 29, 1977
    Date of Patent: July 18, 1978
    Assignee: Neenah Foundry Company
    Inventor: Jack M. Meyer