Pipe joints or couplings – Frangible element
Patent
1998-08-21
2000-02-01
Arola, Dave W.
Pipe joints or couplings
Frangible element
285337, 285322, F16L 2106, F16L 3500
Patent
active
060193964
ABSTRACT:
A pipe connecting apparatus for connecting a first pipe with a second pipe inserted into the first pipe member is disclosed. The apparatus includes an elastic seal to be disposed within a gap formed between an inner peripheral face of the first pipe and an outer peripheral face of the second pipe, the elastic seal being compressed in an axial direction along the axis of the first pipe for sealing the gap, a press ring fitted on the second pipe, the press ring being movable on the outer peripheral face of the second pipe in the axial direction, and a retainer member fitted on the second pipe, the retainer member having a locked condition in which the retainer member is pressed against the second pipe and a released condition in which the retainer member is radially expanded to be released from the locked condition, the retainer member being switched over from the released condition to the locked condition in association with a movement thereof relative to the press ring. A sequentially operative mechanism is operative to press the elastic seal alone in the axial direction while the retainer member is at the released condition in a first state where the compressive force is low, the sequentially operative mechanism being operative to allow the retainer member to be switched over to the locked condition in a second state where the compressive force is high.
REFERENCES:
patent: 4116478 (1978-09-01), Yamaji et al.
patent: 4878698 (1989-11-01), Gilchrist
patent: 5069490 (1991-12-01), Halen
patent: 5100183 (1992-03-01), Montesi et al.
patent: 5297826 (1994-03-01), Percebois et al.
patent: 5803513 (1998-09-01), Richardson
Saito Kikuo
Shimonaka Yasushi
Totsugi Akihito
Yoneyama Hideki
Arola Dave W.
Waterworks Technology Development Organization Co., Ltd.
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