Patents by Inventor Raimo Karhu

Raimo Karhu 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).

  • Patent number: 5546741
    Abstract: The reverse stranding apparatus and method provides elongated elements drawn from supply reels through a divider device, torsion tubes surrounding a central element peripherally and rotatable periodically in opposite directions about the central element and a twisting head rotatable in opposite directions into a nozzle. To achieve a constant pitch and to adjust the tension, the elements are guided to pass about an input capstan before the dividing device and a stranded cable is passed about an output capstan immediately after the nozzle. The input and output capstans are rotated so that the peripheral speeds thereof are constantly higher than the speed of the cable.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: August 20, 1996
    Assignee: Nokia-Maillefer Oy
    Inventor: Raimo Karhu
  • Patent number: 5355669
    Abstract: A method and an arrangement in connection with reverse stranding, comprising drawing conductors through a stationary divider, peripheral tubes peripherically surrounding a central tube and twistable around the central tube recurrently in opposite directions and a twisting device rotatable in opposite directions, into a stranding nozzle or similar. To achieve longitudinal strip winding, a strip is fed into the central tube. The strip is guided to pass through the rotatable twisting device and further between the desired conductors ahead of the stranding nozzle or similar, the stranding nozzle or similar bending the edges of the strip in the desired direction.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: October 18, 1994
    Assignee: Nokia-Maillefer Holding S.A.
    Inventor: Raimo Karhu
  • Patent number: 5307617
    Abstract: A reverse stranding apparatus for the reverse stranding of conductors. The apparatus comprises a stationary divider plate, a twisting plate rotatable in different directions, and a central element disposed between the parts, and peripheral tubes surrounding the central element, the central element and the peripheral tubes being pressed against each other at least during the twisting step of the conductors, and the conductors to be stranded being adapted to pass through at least the peripheral tubes. To allow high speeds of rotation, the peripheral tubes are connected substantially for their entire length to the central element by a substantially radial part.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: May 3, 1994
    Assignee: Nokia-Maillefer Holding S.A.
    Inventor: Raimo Karhu
  • Patent number: 5277019
    Abstract: A reverse stranding apparatus for the reverse stranding of conductors. The apparatus comprises a stationary divider element, a twisting element rotatable in different directions, and a central element disposed between said parts, and peripheral tubes surrounding said central element, the central element and the peripheral tubes being pressed against each other at least during the twisting step of the conductors and the conductors to be stranded being adapted to pass through at least the peripheral tubes. To attain high speeds of rotation, the peripheral tubes and the central element are united in a tube packet by a reticular fabric enveloping the peripheral tubes and extending substantially over the entire length of said peripheral tubes.
    Type: Grant
    Filed: August 17, 1992
    Date of Patent: January 11, 1994
    Assignee: Nokia-Maillefer Holding S.A.
    Inventor: Raimo Karhu
  • Patent number: 5226271
    Abstract: A reverse stranding apparatus for the reverse stranding of conductors to produce cables or the like and to a method in connection with stranding and reverse stranding. The conductors are drawn from a distributor into a nozzle or equivalent through peripheral tubes circumferentially surrounding a central tube and being twistable about the central tube recurrently in opposite directions. To facilitate the passage of the conductor, a pressurized fluid is fed through the peripheral tubes upstream ends and into the peripheral tubes during the drawing of the conductors to produce oscillation, whereby the conductors passing through each peripheral tube remain substantially detached from the inner surfaces of the peripheral tubes.
    Type: Grant
    Filed: June 20, 1991
    Date of Patent: July 13, 1993
    Assignee: Nokia-Maillefer Holding, S.A.
    Inventor: Raimo Karhu