Pipes and tubular conduits – Combined – With end structure
Patent
1978-04-21
1980-03-18
Footland, Lenard A.
Pipes and tubular conduits
Combined
With end structure
277207A, F16L 4700
Patent
active
041934261
ABSTRACT:
1 A thermoplastic socket pipe part with a sealing member comprising a sealing head and sealing sleeve, the sealing head being retained by means of a retaining ring, which retaining ring is formed by bending back the end part of an extruded plastic tube provided with three widenings with decreasing inner diameter as seen from the free end of the plastic tube.
REFERENCES:
patent: 3349805 (1967-10-01), Fried
patent: 3857589 (1974-12-01), Oostenbrink
patent: 4046387 (1977-09-01), Lee
Footland Lenard A.
Wavin B.V.
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