Pipe thread protector

Details Pipe thread protector Pipe thread protector

1983-07-11

1985-02-26

Marcus, Stephen

Pipes and tubular conduits

End protectors

Threaded

F16L 5700

Patent

active

045013012

ABSTRACT:
A cup shaped or cylindrical thread protector, having circumferentially spaced, internally projecting lugs, is formed by injection molding of a thermoplastic resin into a female mold cavity having a smooth cylindrical interior and having a male mold member fitting therein and cooperable therewith to define a cup shaped or cylindrical cavity. The male mold member has a plurality of recesses of a size and shape operable to produce said lugs in the molded thread protector produced therein. When the thread protector is molded, the male mold member is rotated about its axis sufficiently to compress said lugs into the cup wall thereof at a time after the thermoplastic has solidified but before it has cooled and is then pulled from within the cup shaped member.

REFERENCES:
patent: 1459589 (1923-06-01), Hoffman
patent: 3069040 (1962-12-01), Corsette
patent: 3897090 (1975-07-01), Maroschak
patent: 4033380 (1977-07-01), Weber
patent: 4162736 (1979-07-01), Faulstich
patent: 4411934 (1983-10-01), Steinhagen

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