US 7,344,164 B2
Pipe connection structure
Nobuo Ichimura, Gunma (Japan); Yoshikazu Takamatsu, Sano (Japan); and Susumu Sato, Gunma (Japan)
Assigned to Calsonic Kansei Corporation, Tokyo (Japan)
Filed on Apr. 08, 2005, as Appl. No. 11/101,642.
Claims priority of application No. 2004-115568 (JP), filed on Apr. 09, 2004.
Prior Publication US 2005/0242575 A1, Nov. 03, 2005
Int. Cl. F16L 5/00 (2006.01)
U.S. Cl. 285—203  [285/382; 285/205] 6 Claims
OG exemplary drawing
 
1. A pipe connection structure, comprising:
a pipe including a pipe body having first and second terminal ends, an end portion and a collar extending radially outwardly from the end portion, wherein the collar has an upper surface facing away from the second terminal end of the pipe body and located at a first distance from the first terminal end and a lower surface facing towards the second terminal end of the pipe body and located at a second distance from the second terminal end; and
a block including a passage configured to receive the end portion of the pipe; a recess formed in an open end of the passage for receiving the collar of the pipe; and a peripheral wall of the recess configured to be deformed inwardly and fitted onto the collar;
wherein the collar includes a circular-arc-shaped largest outside diameter portion located closer to a bottom surface of the recess than a thickness center line of the collar.