Patents by Inventor Henry Knaack, Jr.

Henry Knaack, Jr. 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).

  • Cam lever assembly for manhole center
    Patent number: 6595716
    Abstract: A sealable manhole system having a weld ring, a cover with a gasket shaped to engage the weld ring, and a cam lever assembly. The cam lever assembly comprising includes a cam lever having a cam surface and a pivot aperture. A pivot pin is sized to engage the pivot aperture and has a screw aperture formed there through. A connector operatively attached to the weld ring and an adjustment screw passes through the screw aperture and engages the connector. The cover further includes a gasket channel with a neck and an internal shoulder formed above the neck. The internal shoulder further has a dimension wider than the neck and is oriented at an angle to the neck.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: July 22, 2003
    Assignee: Delaware Capital Formation, Inc.
    Inventors: Bryan VanDeVyvere, Henry Knaack, Jr.