Pipe joints or couplings – Nonmetal to metal
Patent
1976-08-30
1978-04-04
Arola, Dave W.
Pipe joints or couplings
Nonmetal to metal
285342, 285348, F16L 3300
Patent
active
040823261
ABSTRACT:
A re-useable compression type pipe connector comprises threaded male and female portions, a retaining ring and a sealing ring. The retaining ring has a hollow, truncated cone-shaped body portion with a plurality of circumferentially spaced-apart slits which extend in an axial direction inwardly from the smaller end of the retaining ring to define a plurality of gripping teeth. The sealing ring has a tubular shaped body portion, the axial length of the sealing ring being substantially longer than the axial length of the body portion of the retaining ring. The threaded portion receiving the end of the pipe has an annular inwardly-sloping surface which overlaps a portion of the retaining ring. The outside diameter of the sealing ring is such that the outside surface thereof slidably contacts the annular inwardly-sloping surface to exert an inwardly-directed force on the body portion of the retaining ring when the connector is assembled on a pipe. The gripping teeth are at a low angle relative to the pipe surface so that the gripping teeth do not substantially mar the pipe surface. An annular portion of the sealing ring which projects beyond the smaller end of the retaining ring is simultaneously moved radially inwardly by the annular inwardly-sloping surface so that the inside surface of the sealing ring intimately contacts the circumference of the pipe to form a fluid-tight seal therearound. The circumferential length of the free end of each gripping tooth is sufficient to provide substantially more than point contact with a pipe surface.
REFERENCES:
patent: 2201372 (1940-05-01), Miller
patent: 2203237 (1940-06-01), Raybould
patent: 3219751 (1965-11-01), Pfendler et al.
patent: 3291510 (1966-12-01), Kody
patent: 3596933 (1971-08-01), Luckenbill
Arola Dave W.
Canadian Brass Limited
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