Patents Assigned to Wavin
  • Guttering
    Patent number: 4378177
    Abstract: A gutter fitting 1 comprises a body member 2 defining a channel for receiving therein a gutter length. A sealing member 6 extends through a slot 8 in the body member and has a respective compressible sealing portion 9 extending transversely of the slot 8 on one or each side of the slot for providing a seal between the inside surface 10 of the body member and the outside surface of a gutter length (not shown) received in the channel. The sealing arrangement is particularly applicable to rectilinear gutter systems.
    Type: Grant
    Filed: June 17, 1981
    Date of Patent: March 29, 1983
    Assignee: Wavin B.V.
    Inventor: Terry G. Nicholas
  • Plastic socket pipe part and method of manufacturing same
    Patent number: 4369159
    Abstract: A thermoplastic socket pipe part with a sealing member comprising a sealing head and sealing sleeve, the sealing head being retained by means of a retaining ring, which retaining ring is formed by bending back the end part of an extruded plastic tube provided with three widenings with decreasing inner diameter as seen from the free end of the plastic tube.
    Type: Grant
    Filed: March 3, 1981
    Date of Patent: January 18, 1983
    Assignee: Wavin B.V.
    Inventor: Adolf Irmer
  • Centering device for shaping tools of extrusion presses
    Patent number: 4368026
    Abstract: The present disclosure is directed to a centering device for shaping tools for extrusion presses, wherein an outer mandrel together with an inner mandrel define a through gap for plastic extrusion material which device has a plurality of centering members supported on the outer mandrel which are distributed over the periphery of a radial plane and which are adjustable in the radial direction and which are constructed in the form of push rods guided for radial displacement. Each push rod (6,106) has associated therewith an individually adjustable drive, an adjustable lever (7,107) supported for pivoting on the outer mandrel and which are actuable by means of a tightening device (8,108) and form a transmission gear for applying the tightening force.
    Type: Grant
    Filed: January 19, 1981
    Date of Patent: January 11, 1983
    Assignee: Wavin B.V.
    Inventors: Eduard J. Budel, Heinrich Fehrmann, Johan de Kok
  • Method for installing a sealing body in a groove of a socket and pipe part of plastic material
    Patent number: 4351791
    Abstract: Method for installing a sealing body in a groove of a socket by forming a closed space in the inner side of the socket. Said closed space is bound by an inner core and an inflatable core being connected with each other by a connecting wall part and is filled with a flowable thermoplastic elastomer through an opening in the wall of the groove. After setting of the thermoplastic elastomer, the two cores are removed.
    Type: Grant
    Filed: December 16, 1980
    Date of Patent: September 28, 1982
    Assignee: Wavin B.V.
    Inventor: Warner J. de Putter
  • 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
  • Plastics pipes having walls with lengthwise extending channels
    Patent number: 4341392
    Abstract: Plastic pipes comprising an inner and outer wall being interconnected by lengthwise extending connecting partitions, forming channels, the ends of the channels being each separately sealed by sealingly pressing the end walls of a channel to each other after these walls have been heated to a temperature surpassing the plasticizing temperature.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: July 27, 1982
    Assignee: Wavin B.V.
    Inventor: Jan P. van Dongeren
  • 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
  • Coloring composition for coloring thermoplastic polymers
    Patent number: 4339278
    Abstract: Coloring composition for coloring thermoplastic polymers obtained by solidifying a liquid mixture of coloring pigments and an ester of phtalic acid and an alcohol. The composition contains at least 40% of pigments and at most 60% of an ester of phtalic acid and an alcohol comprising 12 to 16 carbon atoms.
    Type: Grant
    Filed: June 16, 1980
    Date of Patent: July 13, 1982
    Assignee: Wavin B.V.
    Inventor: Jan U. Stoffelsma
  • Socket pipe
    Patent number: 4331625
    Abstract: Socket pipe of thermoplastics having a groove with longitudinally extending additional recess, which groove is bound by a radially extending head portion.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: May 25, 1982
    Assignee: Wavin B.V.
    Inventors: Jelle van de Zee, Arien Breunis
  • Pipe part provided with a flange
    Patent number: 4330016
    Abstract: A fiber reinforced plastic pipe is provided with an integral flange, comprising circumferentially extending glass fiber fabrics. As the width of the fabrics exceeds the width of the finished flange, the fabrics are provided with inwardly bent parts at one or both side walls of the flange, or with undulating parts.
    Type: Grant
    Filed: October 26, 1979
    Date of Patent: May 18, 1982
    Assignee: Wavin B.V.
    Inventor: Mannes Grendelman
  • Device for manufacturing plastics pipes with oblong channels
    Patent number: 4323339
    Abstract: An apparatus for forming a plastic pipe having a circular cross-section and elongated longitudinal channels in the pipe wall is disclosed. A mass of synthetic plastic material is pressed through an annular space defined by inner and outer annular supports, the annular space having a plurality of spaced pin supports concentrically disposed therein and regulating the quantity of material flow through the annular space, depending on the shape of the pin supports, by selectively moving the walls of the annular supports closer to each other. In a particularly advantageous embodiment, either the wall of the inner annular support or the wall of the outer annular support, or both, are moved closer to each other in the area between adjacent pin supports.
    Type: Grant
    Filed: May 7, 1980
    Date of Patent: April 6, 1982
    Assignee: Wavin B.V.
    Inventors: Johan de Kok, Jan P. van Dongeren
  • Method of and apparatus for manufacturing a plastic pipe comprising longitudinally extending hollow channels in its wall
    Patent number: 4321228
    Abstract: Method and extruder for manufacturing plastic pipes provided with longitudinal channels in its wall. Before the extrusion nozzle of the extruder, the stream of plastics to be extruded for forming the pipe is subdivided into two concentric annular streams flowing through two annular division channels formed by means of a dividing member being retained by only a breaker in the outer division channel, the other division channel forming a free passage between the channel inlet and the outlet.
    Type: Grant
    Filed: March 25, 1980
    Date of Patent: March 23, 1982
    Assignee: Wavin B.V.
    Inventor: Johan de Kok
  • Plastics pallet
    Patent number: 4316419
    Abstract: A plastic pallet provided with oblong channels in which reinforcing rods are locked. The locking is obtained by partially closing the end of a channel or by inwardly shrunk edge parts of openings in said channels.
    Type: Grant
    Filed: December 20, 1978
    Date of Patent: February 23, 1982
    Assignee: Wavin, B.V.
    Inventor: Ernst P. Cupido
  • Pipe part with a displaceable abutment edge
    Patent number: 4313627
    Abstract: A pipe part comprising an abutment-edge and a retaining ring being interconnected by means of retaining strips or dumb-bells which dumb-bells or strips will yield under a load without breaking. The pipe part consists of a polyolefin, preferably a polypropylene.
    Type: Grant
    Filed: March 29, 1979
    Date of Patent: February 2, 1982
    Assignee: Wavin B.V.
    Inventor: Tinus de Lange
  • Crates
    Patent number: 4308966
    Abstract: A crate 1 for bottles with cylindrical body portions has double-skinned corner portions 7 which define with portions 13 of an internal partitioning grid 5 corner compartments 6a for bottles. The inner skin 12 of the corner portion is formed with vertical ribs 14 adjacent the grid portions 13. These ribs, which are interconnected with the outer skin 8 of the corner portion to form hollow columns 14a therewith, strength the corner portions and allow the spacing of the skins thereof to be reduced so that the size of the compartment can be increased for given external crate dimensions, and as the ribs are located adjacent the partitioning portions 13 they occupy space which would otherwise be free and do not reduce the effective size of the corner compartments.
    Type: Grant
    Filed: March 5, 1980
    Date of Patent: January 5, 1982
    Assignee: Wavin B.V.
    Inventors: Ernst Ettema, Coenraad J. B. Benraad
  • Method of manufacturing a plastic tube with longitudinal channels in the wall
    Patent number: 4305899
    Abstract: This invention relates to a method of making a tube of thermoplastic material, comprising longitudinal channels of circular cross-section and having such wall stresses that, after axially cutting the tube, the edge parts along the cut edge overlap each other for less than 8% of the outer circumference of the tube.
    Type: Grant
    Filed: May 9, 1980
    Date of Patent: December 15, 1981
    Assignee: Wavin B.V.
    Inventor: Jan P. van Dongeren
  • Method and apparatus for installing a sealing ring
    Patent number: 4304037
    Abstract: A sealing ring is installed in a groove chamber of a socket by impressing said sealing ring and pushing the impressed sealing ring into the socket, whereafter the impression is terminated and the sealing ring is received in a groove chamber.An apparatus for carrying out the method comprises a sealing ring impression member and sealing ring retaining means for maintaining the sealing ring in the impressed state.
    Type: Grant
    Filed: March 26, 1980
    Date of Patent: December 8, 1981
    Assignee: Wavin B.V.
    Inventor: Wilhelmus F. T. C. Olderaan
  • Guttering
    Patent number: 4297053
    Abstract: A gutter fitting 1 comprises a body member 2 defining a channel for receiving a gutter length. A sealing member 6 extends through a slot 7 in the body member and has a sealing portion 10 for sealing against the gutter length and a retaining portion 11 which extends transversely of the slot 7 and is clamped in a passage 12 between the body member 2 and a clip 13 which snap fits over the opposite longitudinal edges--one edge 8 only shown--of the channel to clamp the gutter length in the channel. The sealing member is thereby adequately retained in the fitting against displacement.
    Type: Grant
    Filed: December 19, 1979
    Date of Patent: October 27, 1981
    Assignee: Wavin B.V.
    Inventor: Terry G. Nicholas
  • Cage construction for use in breeding fur-bearing animals
    Patent number: 4287854
    Abstract: A cage construction for use in breeding fur-bearing animals such as mink, comprises a plurality of cages arranged on a stand, whereby each cage is provided with a breeding coop with an opening giving access to the cage. Each breeding coop is formed by a vertical plastic pipe open at both ends and having a substantially rectangular cross section, the pipe wall being formed by a central foam plastic layer and an outer and an inner solid surface layer. These layers are integrally connected.
    Type: Grant
    Filed: February 11, 1980
    Date of Patent: September 8, 1981
    Assignee: Wavin B.V.
    Inventors: Finn Hansen, Bernhard Lodder
  • Plastics pipes having walls with lengthwise extending channels
    Patent number: 4280534
    Abstract: Plastics pipes comprising an inner and outer wall being interconnected by lengthwise extending connecting partitions, forming channels, the ends of the channels being each separately sealed by sealingly pressing the end walls of a channel to each other after these walls have been heated to a temperature surpassing the plasticizing temperature.
    Type: Grant
    Filed: May 9, 1978
    Date of Patent: July 28, 1981
    Assignee: Wavin B.V.
    Inventor: Jan P. van Dongeren