Other

Swagelok Company

Crawford Fitting Co.

Howard C Kuhns

Peter C Williams

David A McMillan

Edward A Pezak

Steven J Volcansek

Myron E Luikart

High localized loading, galling, and high torque forces have been generally eliminated or greatly reduced in a two ferrule tube fitting assembly through suitable modification of the rear ferrule so as to redirect the reaction forces acting between the front ferrule and the drive nut. The rear ferrule has a cylindrical interior wall that closely surrounds the tube end and is provided on the interior cylindrical wall with a circumferentially continuous radial recess that is located between the nose and rear wall of the rear ferrule. The rear ferrule also has a radially external wall that is substantially conical and additionally shaped to extend radially outward toward the enlarged diameter portion or flange of the rear ferrule. The rear ferrule further includes a contoured face on the rear driven surface of the ferrule that engages the drive surface of the drive nut.

Ferrule with relief to reduce galling

High localized loading, galling, and high torque forces have been generally eliminated or greatly reduced in a two ferrule tube fitting assembly through suitable modification of the rear ferrule so as to redirect the reaction forces acting between the front ferrule and the drive nut. The rear ferrule has a cylindrical interior wall that closely surrounds the tube end and is provided on the interior cylindrical wall with a circumferentially continuous radial recess that is located between the nose and rear wall of the rear ferrule. The rear ferrule also has a radially external wall that is substantially conical and additionally shaped to extend radially outward toward the enlarged diameter portion or flange of the rear ferrule.

Apparatus intended for bending heavy through thin wall pipe and tubing includes a generally circular bending shoe mounted for rotation about a first axis and having a plurality of semi-circular concave grooves in its outer surface. The grooves are of differing sizes and located in side-by-side axial spaced planes perpendicular to the first axis. A separate pair of bending rollers is provided for cooperation with each separate concave groove. Each pair of rollers includes a first roller and a second roller having concave exterior grooves and mounted on a bracket for independent rotary movement about separate second and third axes. A support arm is joined to the bracket for permitting tilting movement of the bracket relative to the support arm about a fourth axis parallel to the second and third axes. Carrying the support arms to position the cooperating roller pairs adjacent the associated groove of the bending shoe is an adjustable frame assembly, the frame assembly including supports for permitting rapid telescopic insertion and removal of the support arms from the frame assembly for selective use of separate ones of the plurality of grooves in the outer surface of the bending shoe. Preferably, the roller sets having rolls with surfaces contoured to eliminate flattening of the tubes during bending.

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Aurora, OH, United States of America

Howard C Kuhns