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Tube-to-hose coupling (spin-sert) and method of making same

  • US 5,370,425 A
  • Filed: 08/25/1993
  • Issued: 12/06/1994
  • Est. Priority Date: 08/25/1993
  • Status: Expired due to Term
First Claim
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1. A tube coupling comprising a metal tube of relatively uniform thickness and having a radially outwardly expanded integral sleeve at one end thereof, and a radially extending tube shoulder being defined at the juncture at which said sleeve is expanded outwardly, said tube having a throughbore of a first inner diameter, and said expanded sleeve having a throughbore of a second inner diameter greater than said first inner diameter and concentric therewith;

  • a cylindrical, hollow insert concentric with the axis of said tube, said insert including a radially extending annular collar at one end thereof, said collar having a tube end face abutting said radial tube shoulder and being inertially welded to said tube at the interface of said tube end face and said radial tube shoulder;

    said insert including at its other end a cylindrical barrel portion having hose locking and sealing means;

    a flexible hose supported on said insert barrel portion and being secured and sealed relative to said sleeve and said insert by said sleeve being crimped over said insert barrel portion to thereby extrude the hose into the sealing and locking grooves permanently holding said hose in compression.

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