Molded-joint assembly

Details Molded-joint assembly Molded-joint assembly

1983-03-16

1985-11-12

Arola, Dave W.

Pipe joints or couplings

With fluid pressure seal

Flexible lip

285291, 285297, 28573', F16L 1702

Patent

active

045523843

ABSTRACT:
A hard outer member generally centered on an axis and having a concave inner surface is injection molded of a relatively hard synthetic resin to have on its inner surface at one end a recess formed with a radially throughgoing passage. Parts of the mold in which this member is molded are then displaced before the resin has time to cure and another softer synthetic resin injected through this radially throughgoing passage to form in the recess a relatively soft seal having a sprue extending through the passage. The seal therefore adheres in surface contact with the inner surface at the recess and the sprue further ensures excellent holding of the seal on the member.

REFERENCES:
patent: 3690701 (1972-09-01), Gramain
patent: 3960394 (1976-06-01), Hubner et al.
patent: 4173362 (1979-11-01), Glover et al.

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