Pipe fitting having strengthened starter threads

Details Pipe fitting having strengthened starter threads Pipe fitting having strengthened starter threads

2005-03-15

2005-03-15

Bochna, David E. (Department: 3679)

Pipe joints or couplings

Particular interface

Diverse metal

C285S334400, C285S333000, C285S392000

Reexamination Certificate

active

06866305

ABSTRACT:
A pipe fitting has a body with an internally threaded bore and at least one female starter thread. The at least one female starter thread is disposed either within the bore or immediately outside of the bore. The starter thread is axially aligned with the bore threads. The starter thread is made from a material which is stronger than the material from which the bore threads are made.

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Spears Manufacturing Co. Brochure, “PVC & CPVC Transition Adapters,” BR-2-0393, Feb. 1993.
Spears Manufacturing Co. Brochure, “CPVC Schedule 80 and 150 Series Large Diameter Fittings,” 800C-0293, Printed 1/93.
Spears Manufacturing Co. Brochure, “CPVC Schedule 80 and 150 Series Large Diameter Fittings,” 800C-0293A, Printed 1/93.
Spears Manufacturing Co. Brochure, “BlazeMaster Fire Sprinkler Piping Products” List Price Schedule, FS-1-0592, Printed 4/92.

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