Exhaust pipe connection structure and exhaust pipe connection method
AssigneeFutaba Industrial Co., Ltd.
InventorsYoshiki Tanaka, Kazunari Ohno, Masayuki Sudoh, Fumihiko Sato, Tetsuo Nakazawa
Life of this patent
Estimating the term…
Abstract
An exhaust pipe connection structure for interconnecting a connection pipe and an exhaust pipe that are arranged in an exhaust system of an, internal combustion engine. Either of the connection pipe or the exhaust pipe is inserted into the other, and the portion where the connection pipe and the exhaust pipe overlap each other is radially deformed and swaged.
Claims15
An exhaust pipe connection structure for interconnecting an exhaust pipe and a connection pipe that are arranged in an exhaust system of an internal combustion engine,
- wherein the exhaust pipe connection structure is manufactured by:
- inserting one of the exhaust pipe and the connection pipe into the other;
- and
- swaging a portion where the exhaust pipe and the connection pipe overlap each other by deforming the portion radially around an entire circumference,
- wherein upon swaging the overlap portion, a non-swaged portion, or a small deformed portion which has a smaller radial deformation than the swaged portion, is left at both leading ends of the exhaust pipe and the connection pipe.
(canceled)
An exhaust pipe connection method for interconnecting an exhaust pipe and a connection pipe that are arranged in an exhaust system of an internal combustion engine, comprising steps of:
- inserting one of the exhaust pipe and the connection pipe into the other;
- and
- swaging a portion where the exhaust pipe and the connection pipe overlap each other by deforming the portion around an entire circumference in a radial direction of the exhaust pipe,
- wherein upon swaging the overlap portion, a non-swaged portion, or a small deformed portion which has a smaller radial deformation than the swaged portion, is left at both leading ends of the exhaust pipe and the connection pipe.
(canceled)
Dependencies are inferred from the claim text.