Patents by Inventor Roelof H. Marissen

Roelof H. Marissen 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).

  • Pipe part with socket provided with longitudinally extending channels
    Patent number: 4432395
    Abstract: The invention relates to a pipe part with a socket being provided with longitudinally extending channels. The channels extend into the wall of the socket. The socket engages a J-shaped retaining ring which forms with the socket a recess for retaining the flange of a seal that includes a sealing sleeve. The retaining ring adheres to the outer side of the socket by an adhesive.
    Type: Grant
    Filed: April 21, 1982
    Date of Patent: February 21, 1984
    Assignee: Wavin B.V.
    Inventors: Joannes H. Beune, Roelof H. Marissen
  • Plastic pipe provided with a groove
    Patent number: 4428591
    Abstract: A plastic pipe comprises an inner wall and an outer wall, being integral with longitudinal partitions betweem them and bounding longitudinally extending channels and a circumferential, helically or non-helically extending groove, which groove has been formed by closing the channels by pressing channel wall parts onto each other. A retaining ring may be snapped into an external groove.
    Type: Grant
    Filed: May 17, 1982
    Date of Patent: January 31, 1984
    Assignee: Wavin B.V.
    Inventors: Roelof H. Marissen, Joannes H. Beune
  • Pipe part with socket provided with longitudinally extending channels
    Patent number: 4344461
    Abstract: Pipe part with socket being provided with longitudinally extending channels, said channels also extending in the wall of the socket, said socket being provided with an annular groove, formed by sealingly pressing the walls of the channels onto each other, the socket further engaging a J-shaped retaining ring forming with the socket a recess for retaining the flange of a sealing means, comprising a sealing sleeve.
    Type: Grant
    Filed: December 28, 1979
    Date of Patent: August 17, 1982
    Assignee: Wavin B.V.
    Inventors: Joannes H. Beune, Roelof H. Marissen
  • Plastic pipe provided with a groove
    Patent number: 4338716
    Abstract: A plastic pipe comprises an inner wall and an outer wall, being integral with longitudinal partitions between them and bounding longitudinally extending channels and a circumferential, helically, or non-helically extending groove, which groove has been formed by closing the channels by pressing channel wall parts onto each other. A retaining ring may be snapped into an external groove.
    Type: Grant
    Filed: December 28, 1979
    Date of Patent: July 13, 1982
    Assignee: Wavin B.V.
    Inventors: Roelof H. Marissen, Joannes H. Beune