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Method of manufacturing acute angled vessel connector

  • US 4,450,613 A
  • Filed: 01/21/1982
  • Issued: 05/29/1984
  • Est. Priority Date: 01/21/1982
  • Status: Expired due to Term
First Claim
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1. Method of manufacturing an acute angled vessel connector adapted to be mounted in a vessel or pipeline and to provide an angled connection from such vessel or pipeline to a branch pipe wherein the vessel connector includes a generally cylindrical main body having integrally formed therewith a contoured mounting rim, said main body having a bore therethrough which is directed at a predesignated acute angle with respect to said annular mounting rim, comprising the steps of:

  • providing an offset forging which is a generally rectangular block having an offset at one end thereof with an approximately diametrical distance from one lower edge at the other end of said forging to an upper edge formed by said offset which is greater than the length of the contoured mounting rim to be machined therein;

    machining an interior body bore having a cylindrical inside wall with a central axis in said offset forging generally parallel to the longitudinal axis of the forging and approximately at a predesignated acute angle with respect to an imaginary line extending diametrically across said forging;

    facing said one end of said forging so that said one end is precisely perpendicular to said interior body bore;

    milling said other end of said forging to provide a curved undersurface which has the same radius of curvature as the vessel or pipeline inside wall in which said contoured mounting rim is to be welded, said curved undersurface intersecting said interior body bore wall in an inner, generally elliptical edge;

    machining said forging outside surface into a main body which is partially cylindrical in shape and having certain outside wall portions parallel to said cylindrical inside wall forming said interior body bore and an edge portion of said contoured mounting rim in a generally elliptical shape;

    machining said other end of said forging having said curved undersurface into a contoured mounting rim having an exterior ledge portion of gradual curvature, said ledge portion being of sufficient width to allow for x-ray inspection of adjacent weld material, said ledge portion of gradual curvature meeting said outside cylindrical surface of said main body; and

    machining said inner edge of said curved undersurface such that said portion of said edge directly receiving fluid flow has a substantially larger radius of curvature than the remainder of said inner edge of said undersurface.

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