Pipe joints or couplings – Flexible joint – rigid members – Resilient sleeve type
Patent
1976-03-29
1978-07-04
Arola, Dave W.
Pipe joints or couplings
Flexible joint, rigid members
Resilient sleeve type
285369, 285423, F16L 2100
Patent
active
040985288
ABSTRACT:
There is provided a pipe coupling for plain-end relatively rigid pipe formed of spaced outer gripping zones of relatively soft material and containing biased continuous filament strands embedded therein, and an intermediate zone of tough hard material with discontinuous reinforcement embedded therein.
REFERENCES:
patent: 3104898 (1963-09-01), MacDonald et al.
patent: 3233907 (1966-02-01), Stanton
patent: 3284110 (1966-11-01), Marcus et al.
patent: 3394952 (1968-07-01), Garrett
patent: 3462175 (1969-08-01), Johnson
patent: 3558164 (1971-01-01), Havell
patent: 3612580 (1971-10-01), Jones
patent: 3979142 (1976-09-01), Fujisawa
Amsted Industries Incorporated
Arola Dave W.
Kostka Fred P.
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