Swagelok Company

Crawford Fitting Co.

Edward A Pezak

Peter C Williams

Dale C Arstein

Carl E Meece

Howard C Kuhns

Steven J Volcansek

Myron E Luikart

A fitting assembly is provided with a first fitting component having a stepped wall surface; and a second fitting component radially spaced from the first fitting component when the fitting assembly is in a finger tight condition prior to pull-up. When the second fitting component is displaced into contact with the stepped wall surface during fitting pull-up, the stepped wall surface assists in separating the first fitting component from the second fitting component upon fitting disassembly.

Fitting nut with adapted engaging surfaces

Fitting with adapted engaging surfaces

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.

Tube bender apparatus

Growing community of inventors

Solon, OH, United States of America

Edward A Pezak