Patents by Inventor Sven Sjoberg
Sven Sjoberg 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).
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Patent number: 9862136Abstract: A method of spirally winding a thermoplastic profile in the manufacture of welded plastic tubes and a winding apparatus for manufacturing a spirally wound tube. A thermoplastic profile is received on a plurality of sliding members being arranged in an axial direction of the tube to be manufactured and defining an essentially cylindrically shaped winding surface with a diameter essentially corresponding to the inner diameter of the tube. The profile is directed along a spiral path towards the previous turn of the profile in order to force opposite edges of the profile together for welding. The radial position of the sliding member is adjusted to control the tension in the thermoplastic profile and the force with which it constricts itself around the winding surface as defined by the sliding member.Type: GrantFiled: November 19, 2013Date of Patent: January 9, 2018Assignee: UPONOR INFRA OYInventors: Christian Glasberg, Kari Karjalainen, Johan Portman, Sven Sjöberg
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Patent number: 9821514Abstract: A method and apparatus in the manufacture of a spirally wound and welded tube is disclosed. A thermoplastic profile is slid along a path on a slider arranged in an axial direction of the tube and defining a cylindrically shaped winding surface with a diameter corresponding to the inner diameter of the tube to be manufactured. The profile is directed along a spiral path towards a previous turn of said profile by means of radial rollers spaced along said spiral path by adjusting the position of the rollers: Opposite edges of said profile turns are welded together by providing an extruded welding mass between said profile turns. The welded tube is fed from the welding station by means the rollers by sliding it onto a rotating support.Type: GrantFiled: November 19, 2013Date of Patent: November 21, 2017Assignee: UPONOR INFRA OYInventors: Christian Glasberg, Kari Karjalainen, Sven Sjöberg
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Patent number: 9550210Abstract: The present publication discloses a method for coating pipes. The method comprises applying curable first polymer (e.g. epoxy) onto the surface of the pipe and partially curing the first polymer or leaving the first polymer uncured to in order to form a reactive first polymer layer. Thereafter, the pipe with the reactive first polymer layer is heated and a second polymer (e.g. polyolefin) is applied directly onto the heated reactive first polymer layer, whereby the two polymers react and form a protective coating on the pipe or pipe section. In particular, the heating can be carried out in two steps such that the first polymer stays reactive until the application of the second polymer.Type: GrantFiled: September 16, 2010Date of Patent: January 24, 2017Assignees: BOREALIS AG, UPONOR INFRA OYInventors: Leif Leiden, Jouni Purmonen, Sven Sjoberg
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Publication number: 20160144391Abstract: Device and connector tube for coating a pipe or portion of a pipe, which has an outer surface determined by the outer circumference of the pipe or portion of a pipe. The device includes a moving device, which can rotate around the outer surface of the pipe or portion of a pipe, and a coating nozzle, which is connected to a molten-polymer source in order to form a polymer film, which nozzle is attached to the device, which can rotate around the pipe. The feed tube forms at least part of the molten polymer's feed route from the source to the coating nozzle, which feed tube includes at least two rigid tubes and at least one connector, which includes at least two connector parts for connection to the tube and a bearing arrangement fitted between the connector parts, which permits the connector parts to rotate around their common longitudinal axis and keeps the connector parts parallel to each other.Type: ApplicationFiled: June 19, 2014Publication date: May 26, 2016Applicant: UPONOR INFRA OYInventors: Christian GLASBERG, Kari KARJALAINEN, Sven SJÖBERG, Alpo SIEKKINEN
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Publication number: 20150336325Abstract: A method of spirally winding a thermoplastic profile in the manufacture of welded plastic tubes and a winding apparatus for manufacturing a spirally wound tube. A thermoplastic profile is received on a plurality of sliding members being arranged in an axial direction of the tube to be manufactured and defining an essentially cylindrically shaped winding surface with a diameter essentially corresponding to the inner diameter of the tube. The profile is directed along a spiral path towards the previous turn of the profile in order to force opposite edges of the profile together for welding. The radial position of the sliding member is adjusted to control the tension in the thermoplastic profile and the force with which it constricts itself around the winding surface as defined by the sliding member.Type: ApplicationFiled: November 19, 2013Publication date: November 26, 2015Applicant: UPONOR INFRA OYInventors: Christian GLASBERG, Kari KARJALAINEN, Johan PORTMAN, Sven SJÖBERG
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Patent number: 9186838Abstract: The invention relates to an apparatus and method for coating a pipe or a section of a pipe with a polymer layer. The apparatus comprises an applicator for applying polymer melt on the surface of a pipe or pipe section, a roller for pressing the polymer applied by the applicator towards the pipe or pipe section, and means for circumferentially moving the applicator and the roller around the periphery of the pipe or pipe section. According to the invention the apparatus further comprises a drive for rotating the roller as the roller is moving around the periphery of a pipe or pipe section. By means of the invention, higher quality coatings can be applied to field joints of steel pipes, for example.Type: GrantFiled: September 16, 2010Date of Patent: November 17, 2015Assignees: OY KWH PIPE AB, BOREALIS AHInventors: Leif Leiden, Jouni Purmonen, Sven Sjoberg
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Publication number: 20150314525Abstract: A method and apparatus in the manufacture of a spirally wound and welded tube is disclosed. A thermoplastic profile is slid along a path on a slider arranged in an axial direction of the tube and defining a cylindrically shaped winding surface with a diameter corresponding to the inner diameter of the tube to be manufactured. The profile is directed along a spiral path towards a previous turn of said profile by means of radial rollers spaced along said spiral path by adjusting the position of the rollers: Opposite edges of said profile turns are welded together by providing an extruded welding mass between said profile turns. The welded tube is fed from the welding station by means the rollers by sliding it onto a rotating support.Type: ApplicationFiled: November 19, 2013Publication date: November 5, 2015Applicant: UPONOR INFRA OYInventors: Christian GLASBERG, Kari KARJALAINEN, Sven SJÖBERG
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Patent number: 8932681Abstract: Method and apparatus for coating a pipe or a pipe section with a layer of at least one polymer. The method includes providing the pipe or the pipe section having an outer surface defining the periphery of the pipe or the pipe section; applying on the outer surface of the pipe or pipe section a layer of at least one polymer material in melt stage using a nozzle, which is mounted on a carriage capable of travelling along the periphery of the pipe or the pipe section; and moving the carriage along at least a part of the periphery during the application of the polymer material to form a layer on the surface of the pipe or the pipe section that is particularly useful for coating field joints in pipelines.Type: GrantFiled: March 18, 2013Date of Patent: January 13, 2015Assignees: Uponor Infra Oy, Borealis Technology OyInventors: Leif Leiden, Sven Sjoberg, Rauno Smatt
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Patent number: 8663767Abstract: A hollow profile used in the manufacture of a spirally wound double-walled thermo-plastic pipe, having essentially a rectangular cross section, two side walls and an outer wall and an inner wall limiting a cavity within. In the hollow profile the inner wall of the pipe is thicker than the wall of the hollow profile intended to form the outer wall of the pipe. The inner rounding radius of the edges adjacent to the thicker wall of the hollow profile is considerably larger than the rounding radius of the two other edges of the cavity and the inside surface of the thicker wall comprises a rib extending in the hollow cavity of the profile, on the side of the profile forming the inner side of the pipe, in the longitudinal direction of the profile at least essentially along the whole length of the profile.Type: GrantFiled: January 18, 2011Date of Patent: March 4, 2014Assignee: Oy KWH Pipe ABInventors: Sven Sjöberg, Christian Vestman
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Patent number: 8474401Abstract: Method and apparatus for coating a pipe or a pipe section with a layer of at least one polymer. The method includes providing the pipe or the pipe section having an outer surface defining the periphery of the pipe or the pipe section; applying on the outer surface of the pipe or pipe section a layer of at least one polymer material in melt stage using a nozzle, which is mounted on a carriage capable of travelling along the periphery of the pipe or the pipe section; and moving the carriage along at least a part of the periphery during the application of the polymer material to form a layer on the surface of the pipe or the pipe section that is particularly useful for coating field joints in pipelines.Type: GrantFiled: April 24, 2008Date of Patent: July 2, 2013Assignees: Oy KWH Pipe AB, Borealis Technology OyInventors: Leif Leidén, Sven Sjöberg, Rauno Smått
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Publication number: 20130011620Abstract: A hollow profile used in the manufacture of a spirally wound double-walled thermo- plastic pipe, having essentially a rectangular cross section, two side walls and an outer wall and an inner wall limiting a cavity within. In the hollow profile the inner wall of the pipe is thicker than the wall of the hollow profile intended to form the outer wall of the pipe. The inner rounding radius of the edges adjacent to the thicker wall of the hollow profile is considerably larger than the rounding radius of the two other edges of the cavity and the inside surface of the thicker wall comprises a rib extending in the hollow cavity of the profile, on the side of the profile forming the inner side of the pipe, in the longitudinal direction of the profile at least essentially along the whole length of the profile.Type: ApplicationFiled: January 18, 2011Publication date: January 10, 2013Applicant: OY KWH PIPE ABInventors: Sven Sjöberg, Christian Vestman
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Publication number: 20120231168Abstract: The invention relates to an apparatus and method for coating a pipe or a section of a pipe with a polymer layer. The apparatus comprises an applicator for applying polymer melt on the surface of a pipe or pipe section, a roller for pressing the polymer applied by the applicator towards the pipe or pipe section, and means for circumferentially moving the applicator and the roller around the periphery of the pipe or pipe section. According to the invention the apparatus further comprises a drive for rotating the roller as the roller is moving around the periphery of a pipe or pipe section. By means of the invention, higher quality coatings can be applied to field joints of steel pipes, for example.Type: ApplicationFiled: September 16, 2010Publication date: September 13, 2012Applicants: BOREALIS AG, OY KWH PIPE ABInventors: Leif Leiden, Jouni Purmonen, Sven Sjoberg
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Publication number: 20110248072Abstract: Method and apparatus for coating a pipe (2) or a pipe section with a layer of at least one polymer. The method comprises providing a pipe (2) or a pipe section having an outer surface defining the periphery of the pipe or pipe section; applying on the outer surface of the pipe or pipe section a layer of at least one polymer material in melt stage using a nozzle (3), which is mounted on a carriage capable of travelling along the periphery of the pipe (2) or pipe section; and moving the carriage along at least a part of the periphery during the application of the polymer material to form a layer on the surface of the pipe (2) or pipe section. The outer surface of the pipe or pipe section is being locally heated by induction heating before the application of the polymer material onto said surface. The present invention is particularly useful for coating field joints in pipelines.Type: ApplicationFiled: October 23, 2009Publication date: October 13, 2011Applicants: BOREALIS AG, OY KWH PIPE ABInventors: Leif Leidén, Sven Sjöberg, Rauno Smått
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Patent number: 7770604Abstract: This invention relates to a hollow profile (1) used for the manufacture of a spirally wound double-walled thermoplastic pipe, which hollow profile has essentially a rectangular cross section and the wall (2) of the hollow profile intended to form the inner wall of the pipe is thicker than the wall (4) intended to form the outer wall (4) of the pipe. The invention is characterized in that the inner rounding radius (7a) of the edges adjacent to the thicker wall (2) of the hollow profile is considerably larger than the rounding radius (7) of the two other edges of the cavity (6).Type: GrantFiled: February 23, 2004Date of Patent: August 10, 2010Assignee: Oy KWH Pipe AbInventor: Sven Sjöberg
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Publication number: 20100133324Abstract: Method and apparatus for coating a pipe (2) or a pipe section with a layer of at least one polymer. The method comprises providing a pipe (2) or a pipe section having an outer surface defining the periphery of the pipe or pipe section; applying on the outer surface of the pipe or pipe section a layer of at least one polymer material in melt stage using a nozzle (3), which is mounted on a carriage capable of travelling along the periphery of the pipe (2) or pipe section; and moving the carriage along at least a part of the periphery during the application of the polymer material to form a layer on the surface of the pipe (2) or pipe section. The present invention is particularly useful for coating field joints in pipelines.Type: ApplicationFiled: April 24, 2008Publication date: June 3, 2010Inventors: Leif Leidén, Sven Sjöberg, Rauno Smått
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Publication number: 20060225804Abstract: This invention relates to a hollow profile (1) used for the manufacture of a spirally wound double-walled thermoplastic pipe, which hollow profile has essentially a rectangular cross section and the wall (2) of the hollow profile intended to form the inner wall of the pipe is thicker than the wall (4) intended to form the outer wall (4) of the pipe. The invention is characterized in that the inner rounding radius (7a) of the edges adjacent to the thicker wall (2) of the hollow profile is considerably larger than the rounding radius (7) of the two other edges of the cavity (6).Type: ApplicationFiled: February 23, 2004Publication date: October 12, 2006Applicant: Oy KWH Pipe AbInventor: Sven Sjoberg