Patent Number: 6,945,569

Title: Enhanced durability hammer union

Abstract: A union for connecting two tubular members. The first tubular member has an external flange, and the second tubular member has a set of external threads. An annular nut surrounds the first tubular member. The nut has an internal flange that surrounds the first tubular member, and a set of threads to engage the threads of the second tubular member. Arcuate segments are circumferentially mated between the internal flange of the nut and the external flange of the first tubular member. A flat conical surface on the inner side of the segment comes into contact with a flat conical surface on the outer side of the external flange. Curved conical surfaces tangentially align with and extend from the flat conical surfaces on the segment and the external flange. Cylindrical surfaces tangentially align and join the curved conical surfaces on the segment and the tubular member.

Inventors: Diaz; Juan M. (Plano, TX), Matzner; Mark D. (Burleson, TX)

Assignee: S.P.M. Flow Control, Inc.

International Classification: E21B 17/02 (20060101); F16L 35/00 (20060101); F16L 15/08 (20060101); F16L 19/02 (20060101); F16L 15/00 (20060101); F16L 035/00 ()

Expiration Date: 9/20/02017