Pipe joints or couplings – With means blocking release of holding means – Thread lock
Patent
1998-09-11
2000-11-07
Arola, Dave W.
Pipe joints or couplings
With means blocking release of holding means
Thread lock
285 93, 285331, 2853345, 285342, 285423, 285906, F16L 5500
Patent
active
061425354
ABSTRACT:
The present invention relates to a fastening-limiting device for a fastening member which fastens a pipe inserted into a pipe receiving port on the side of a joint. The fastening-limiting device has a ring portion which is fittable onto the outside of the pipe receiving port. A beam portion is formed on the ring portion. A protrusion is formed on the beam portion. A first abutting portion which is to abut against a reference face on the side of the joint is formed on one end of the ring portion. A second abutting portion which is to abut against a confronting portion of the fastening member is formed on the other end of the ring portion. A gap between the first and second abutting portions and is equal to the gap between the reference face and the confronting portion at the time when the fastening member exerts a sealing property and a function of preventing slipping-off. According to the present invention, when an appropriate sealing property of the pipe connection portion and prevention of slipping-off of the pipe are to be attained, the screw amount of the fastening member can be appropriately determined without dispersion.
REFERENCES:
patent: 4452473 (1984-06-01), Ruschke
patent: 4785858 (1988-11-01), Valentini
patent: 4940260 (1990-07-01), Odriozola
patent: 5188398 (1993-02-01), Parimore et al.
patent: 5215336 (1993-06-01), Worthing
patent: 5746454 (1998-05-01), Webb
patent: 5851035 (1998-12-01), Marc et al.
Fujii Makoto
Ishida Takuya
Nishio Kiyoshi
Okamoto Yutaka
Arola Dave W.
Nippon Pillar Packing Co. Ltd.
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