Hydraulic noise suppressor

Claim 1

A CONDUIT FOR USE IN A FLUID SYSTEM HAVING A PULSATING FLUID FLOWING THERETHROUGH COMPRISING FIRST AND SECOND METALLIC TUBES AND A NOISE SUPPRESSING JOINT BETWEEN SAID TUBES PROVIDING A CHANGE IN CONDUIT DIAMETER AND ALLOWING RELATIVE AXIAL MOVEMENT BETWEEN THE TUBES, SAID FIRST TUBE HAVING AN OUTER DIAMETER APPROXIMATELY HALF THE INNER DIAMETER OF SAID SECOND TUBE, SAID FIRST TUBE BEING TELESCOPED WITHIN SAID SECOND TUBE AT SAID JOINT, A SLEEVE OF RUBBER EXTENDING ALONG THE RADIAL SPACE BETWEEN SAID TUBES, SAID SLEEVE HAVING A NORMAL WALL THICKNESS SUBSTANTIALLY EQUAL TO THE RADIAL SPACE BETWEEN SAID TUBES, SAID SLEEVE HAVING AN OPEN END FACE AT ITS INNER END EXPOSED TO FLUID PRESSURE IN SAID CONDUIT, SAID SECOND TUBE BEING CRIMPED AT LEAST TWICE AT AXIALLY SPACE ZONES TO REDUCED THE RUBBER SLEEVE TO ABOUT HALF ITS NORMAL THICKNESS IN SAID ZONES AND TO PLACE THE RUBBER BETWEEN THE CRIMPED ZONES IN COMPRESSION TO BOND THE RUBBER TO THE TUBES WHEREBY THE RUBBER IS PLACED IN SHEAR BY RELATIVE AXIAL MOVEMENT BETWEEN THE TUBES.