Patents by Inventor Arjan Dirk van Lenthe

Arjan Dirk van Lenthe 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).

  • Thermoplastic tube
    Publication number: 20070164486
    Abstract: A method for producing a tube section from thermoplastic material, in which a tube section is extruded by means of an extruder which is provided with an extruder die having an inner core, which inner core defines an axial hollow space in the tube section, the tube section coming out of the extruder die downstream of the extruder die being internally cooled by means of an internal cooling member and externally cooled by means of an external cooling device. Immediately after the tube section leaves the extruder die, the internal cooling member brings about internal cooling of the tube. The external cooling device is positioned downstream of the internal cooling member, so that the external cooling of the tube section is brought about after the internal cooling.
    Type: Application
    Filed: March 16, 2007
    Publication date: July 19, 2007
    Inventors: Arjan Dirk Van Lenthe, Jan Hendrik Prenger, Jan Visscher
  • Thermoplastic tube
    Patent number: 7217379
    Abstract: A method for producing a tube section from thermoplastic material, in which a tube section is extruded by means of an extruder which is provided with an extruder die having an inner core, which inner core defines an axial hollow space in the tube section, the tube section coming out of the extruder die downstream of the extruder die being internally cooled by means of an internal cooling member and externally cooled by means of an external cooling device. Immediately after the tube section leaves the extruder die, the internal cooling member brings about internal cooling of the tube. The external cooling device is positioned downstream of the internal cooling member, so that the external cooling of the tube section is brought about after the internal cooling.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: May 15, 2007
    Assignee: Wavin B.V.
    Inventors: Arjan Dirk van Lenthe, Jan Hendrik Prenger, Jan Visscher
  • Methods and devices for the production of a pipe from biaxialy oriented thermoplastic material having an integrated socket
    Patent number: 7069635
    Abstract: A method for forming an integral socket to a pipe made from biaxially oriented thermoplastic material is described. The pipe has a pipe body and is provided, at one or both ends, with an integral socket. The biaxially oriented thermoplastic pipe is subjected to a socket-forming operation comprising the steps of fixing both axial ends of the unheated end part of the pipe, heating the fixed end part to a suitable socket-forming temperature in one or more steps, and expanding the axially fixed end part with the aid of a fluid pressure in the interior of the end part and/or a vacuum on the outer side of the end part, which expansion may begin as early as during the heating of the end part.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: July 4, 2006
    Assignee: Wavin B.V.
    Inventors: Arjan Dirk van Lenthe, Jan Visscher, Duncan Hamilton Wormald, Jan Hendrik Prenger
  • Thermoplastic tube
    Patent number: 6726863
    Abstract: A method for producing a tube section from thermoplastic material, in which a tube section is extruded by means of an extruder which is provided with an extruder die having an inner core, which inner core defines an axial hollow space in the tube section, the tube section coming out of the extruder die downstream of the extruder die being internally cooled by means of an internal cooling member and externally cooled by means of an external cooling device. Immediately after the tube section leaves the extruder die, the internal cooling member brings about internal cooling of the tube. The external cooling device is positioned downstream of the internal cooling member, so that the external cooling of the tube section is brought about after the internal cooling.
    Type: Grant
    Filed: August 29, 2001
    Date of Patent: April 27, 2004
    Assignee: Wavin B.V.
    Inventors: Arjan Dirk van Lenthe, Jan Hendrik Prenger, Jan Visscher
  • Methods and devices for the production of a pipe from biaxialy oriented thermoplastic material having an integrated socket
    Publication number: 20040016100
    Abstract: A method for forming an integral socket to a pipe made from biaxially oriented thermoplastic material is described. The pipe has a pipe body and is provided, at one or both ends, with an integral socket. The biaxially oriented thermoplastic pipe is subjected to a socket-forming operation comprising the steps of fixing both axial ends of the unheated end part of the pipe, heating the fixed end part to a suitable socket-forming temperature in one or more steps, and expanding the axially fixed end part with the aid of a fluid pressure in the interior of the end part and/or a vacuum on the outer side of the end part, which expansion may begin as early as during the heating of the end part.
    Type: Application
    Filed: June 30, 2003
    Publication date: January 29, 2004
    Inventors: Arjan Dirk Van Lenthe, Jan Visscher, Duncan Hamilton Wormald, Jan Hendrik Prenger
  • Thermoplastic tube
    Publication number: 20020022101
    Abstract: A method for producing a tube section from thermoplastic material, in which a tube section is extruded by means of an extruder which is provided with an extruder die having an inner core, which inner core defines an axial hollow space in the tube section, the tube section coming out of the extruder die downstream of the extruder die being internally cooled by means of an internal cooling member and externally cooled by means of an external cooling device.
    Type: Application
    Filed: August 29, 2001
    Publication date: February 21, 2002
    Inventors: Arjan Dirk van Lenthe, Jan Hendrik Prenger, Jan Visscher