| 摘要 |
1512968 Pipe couplings BOEING CO 5 June 1975 [6 June 1974] 24226/75 Heading F2G A coupling sleeve 10 for swaged attachment to a tube 30 comprises a cylindrical body having an inner peripheral wall with a first diameter and two annular grooves 14, 12 therein, the first groove 14 having a second diameter greater than the first and the second groove 12 having a third diameter greater than the second, the two grooves being separated by a land of a diameter equal to the first diameter, and the ratio of the width of the first groove to the wall thickness of the tube 30 being 2À5 or greater. The ratio of the width of the second groove to that of the first is 0À85 or greater, and preferably 1. A lip formed at the end of the sleeve adjacent the tube end is preferably of the same width as the land and the depth of the second groove is preferably two thirds that of the first groove. The deflection of the swaged tube wall in the first groove 14 is at least 0À01 inch. |
