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Process of making a flow regulation device

  • US 5,549,866 A
  • Filed: 06/22/1994
  • Issued: 08/27/1996
  • Est. Priority Date: 03/18/1991
  • Status: Expired due to Term
First Claim
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1. A method of manufacturing a flow regulation device, comprising the steps of:

  • providing a guide member within an open end of a tube;

    inserting a rod through said guide member and into said tube whereby said guide member maintains said rod coaxial with the axis of said tube, said rod having a smaller external diameter than an internal diameter of said tube;

    molding a portion of the tube around the rod by keeping a cross-section of internal regions of the portion of the tube circular through an entire duration of the step of molding and preventing an outside surface of the tube from becoming semi-molten throughout the entire duration of the step of molding, pressing the portion of the tube on the rod and high frequency heating the portion of the tube; and

    extracting the rod and guide member, whereby the molded portion of the tube that remains constitutes the flow regulation device.

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