Exhaust pipe joint structure and coil spring used in the same

Details Exhaust pipe joint structure and coil spring used in the same Exhaust pipe joint structure and coil spring used in the same

2006-08-22

2006-08-22

Hewitt, James M. (Department: 3679)

Pipe joints or couplings

Ball and socket

C285S267000, C285S268000, C285S049000

Reexamination Certificate

active

07093861

ABSTRACT:
An automobile exhaust-pipe joint structure and a coil spring for use therein. The exhaust pipe connection structure includes a first exhaust pipe having a first flange section, a second exhaust pipe having a second flange section, a ball joint section for connecting the first and second exhaust pipes flexibly, and coupling mechanisms provided at a plurality of positions of the first and second flange sections. One exemplary coupling mechanism includes a bolt member penetrating the first flange section and being secured, at one end part thereof, to the second flange section, and a coil spring of deformed cross-section interposed between the other end part of the bolt member and the first flange section, wherein the cross-section of a wire is reduced in diameter, in the compressing direction with a dimensional ratio between the short diameter and long diameter thereof being in the range of 1.1–2.6.

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