Patents by Inventor Roderick C. Brewis

Roderick C. Brewis 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).

  • Drilling apparatus
    Patent number: 5607257
    Abstract: A swivel device for coupling a back reamer to a plastic pipe to be drawn through a hole has a swivel shaft that extends into a tubular body and engages a bearing. At one side of the bearing an O-ring seals between the shaft and the body. A grease supply path extends past the bearing to a grease chamber on the bearing side of the O-ring and thence via a duct, to a grease chamber on the other side of the O-ring.
    Type: Grant
    Filed: January 10, 1995
    Date of Patent: March 4, 1997
    Inventor: Roderick C. Brewis