Patents by Inventor Arnold Lutter

Arnold Lutter 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).

  • Patent number: 4015324
    Abstract: Pipe flanges of a flanged-pipe joint are separated for replacement of seals or any other purpose by fitting an expandable plug into a bore of one of the flanges, inserting a plate in the gap between the flanges and threading a screw into the expandable plug to cause the latter to grip the wall of the bore while the screw bears against the plate to push the flanges apart. The expandable plug preferably comprises an internal wedging core which displaces outwardly the segments from which the outer member of the plug is formed, the segment being externally toothed to grip the wall.
    Type: Grant
    Filed: May 21, 1976
    Date of Patent: April 5, 1977
    Inventor: Arnold Lutter