Pipe joints or couplings – Irrigation type
Patent
1977-05-23
1979-07-17
Stein, Mervin
Pipe joints or couplings
Irrigation type
285 16, 285 18, 285261, 285373, B05B 1500, F16L 2702, F16L 2706, F16L 5500
Patent
active
041613317
ABSTRACT:
In accordance with the present invention, irrigation pipe couplings for movable irrigation systems may include a spherical coupling structure that allows articulation of sections of the irrigation pipe during operation of the irrigation system. A sealing element is provided that maintains a positive seal when the various sections of irrigation pipe of the irrigation system are static or are moving. The internal and external components of the coupling structure and the sealing element of each of the couplings cooperate in such manner that the sealing elements are easily and quickly replaceable should they become worn or damaged. It is not necessary to cause longitudinal separation of the sections of irrigation pipe to which the coupling structures are affixed in order to achieve replacement of the sealing element. A portion of the external part of the coupling structure provides support for one extremity of one of the pipe sections that are coupled, both in normal operation and during replacement of the sealing element.
REFERENCES:
patent: 143348 (1873-09-01), Holmes
patent: 566410 (1896-08-01), Schinke
patent: 656956 (1900-08-01), Eibee
patent: 1162527 (1915-11-01), Tabbert
patent: 1514327 (1924-11-01), Krause
patent: 1782062 (1930-11-01), Erickson
patent: 3153550 (1964-10-01), Hollett
patent: 3393928 (1968-07-01), Dutcher
patent: 3608826 (1971-09-01), Reinke
patent: 3997192 (1976-12-01), Hansen
patent: 4018979 (1977-04-01), Young
Gifford-Hill & Company, Inc.
Jackson James L.
Pietruszka Carl F.
Stein Mervin
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