Exhaust system connector

Claim 1

In a connector for use on the exhaust system of internal combustion engines to provide a pressure tight seal between components of such systems that are subjected to differential movement patterns including: telescopically interfitting inner and outer circular sleeves; means joining the inner of said sleeves to a first upstream component of the exhaust system, means joining the outer of said sleeves to a downstream or outlet component of said exhaust system, whereby gases from said engine are delivered interiorly of said sleeve connector for flow toward the downstream component, the improvement which comprises: (a) a circular pressure collar having one contracted end interconnected with the inner sleeve and interconnected by a sleeve abutting shoulder with the remainder of a diameter greater than the external diameter of the outer sleeve with the terminal end of the outer sleeve telescoped in the pressure collar through the uncontracted end, and having a roll bead adjacent the uncontracted end providing concentricity thereof, (b) a plurality of longitudinally spaced ribs formed on one of the inner and outer sleeve providing a plurality of circumferential, short cylindrical, axially flat, contact areas with the cylindrical surface of the outer sleeve, which areas are less than the total circumferential axial area between the two telescoped sleeves, providing reciprocal and rotational motion between the two sleeves while maintaining contact therebetween at said contact areas, (c) there being spaced chambers between said ribs for the entrapment of exhaust gases that have passed any upstream rib area providing reduced differential pressures from chamber to chamber.