US 12,259,067 B2
Composite transition fitting
Jeffrey Vincent Littlefield, Brantford (CA); Qing Li, Oakville (CA); and Filippo Martino, Oakville (CA)
Assigned to IPEX TECHNOLOGIES INC., Mississauga (CA)
Filed by IPEX TECHNOLOGIES INC., Oakville (CA)
Filed on Oct. 19, 2022, as Appl. No. 17/969,055.
Application 17/969,055 is a division of application No. 16/897,594, filed on Jun. 10, 2020, granted, now 11,525,528.
Claims priority of application No. 3048214 (CA), filed on Jun. 28, 2019.
Prior Publication US 2023/0041141 A1, Feb. 9, 2023
Int. Cl. B29C 45/14 (2006.01); B29C 70/68 (2006.01); F16L 15/00 (2006.01); F16L 15/06 (2006.01); F16L 25/06 (2006.01); B29K 27/06 (2006.01); B29L 31/24 (2006.01); B29L 31/26 (2006.01)
CPC F16L 15/003 (2013.01) [B29C 70/681 (2013.01); F16L 15/06 (2013.01); F16L 25/06 (2013.01); B29K 2027/06 (2013.01); B29L 2031/24 (2013.01); B29L 2031/26 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method of producing a pipe fitting, the pipe fitting comprising:
a first body and a second body that together at least partially define a fluid flow passage;
the first body defining a first portion of the fluid flow passage that extends from a first end of the fluid flow passage to a first internal opening;
the second body defining a second portion of the fluid flow passage that extends from a second internal opening to a second end of the fluid flow passage;
wherein the first body has a first interface surface that radially surrounds the first internal opening, the first interface surface having a plurality of anti-rotation grooves;
wherein the second body has a second interface surface that radially surrounds the second internal opening and engages with the first interface surface, the first internal opening being in fluid communication with the second internal opening, and the second interface surface having a plurality of anti-rotation fingers that are each received by and engage with a corresponding one of the anti-rotation grooves; and
wherein rotation of the second body relative to the first body is resisted by the engagement of the anti-rotation fingers with the anti-rotation grooves;
the method comprising:
producing the first body; and
overmolding the second body over at least a portion of the first body, including the first interface surface;
wherein the first body has a cylindrical wall with a cylindrical outer surface a cylindrical inner surface, and a ring-shaped end surface that spans between the cylindrical outer surface to the cylindrical inner surface;
wherein the cylindrical inner surface defines at least part of the first portion of the fluid flow passage;
wherein the ring-shaped end surface comprises the first interface surface;
wherein the cylindrical wall extends concentrically about a central axis;
wherein the second body has a cylindrical extension that extends concentrically about the central axis;
wherein the cylindrical extension has an inner extension surface that engages with the cylindrical outer surface of the cylindrical wall;
wherein the cylindrical wall has at least one circumferential groove that extends radially inwardly from the cylindrical outer surface;
wherein the cylindrical extension is overmolded over at least a portion of the cylindrical outer surface, including the at least one circumferential groove; and
wherein the at least one circumferential groove comprises a sealing groove that contains a resiliently compressible o-ring, the o-ring being configured to provide a fluid tight seal between the cylindrical wall and the cylindrical extension.