Pipe joints or couplings – Particular interface – Annular socket
Patent
1999-01-21
2000-04-04
Nicholson, Eric K.
Pipe joints or couplings
Particular interface
Annular socket
285423, 285342, 2853345, F16L 2500
Patent
active
060451645
ABSTRACT:
The present invention relates to a pipe joint made of resin used for laying pipes in which a high-purity liquid, ultra pure water, a medical liquid or the like flow treated in production process in various on a side of an inner periphery thereof kinds technical fields such as production of semiconductor, medical supplies and medicines, food process, and chemical industry. A joint body is provided with a receiving port, a cylindrical portion and an annular groove portion, and an inner ring inserted by a pushing ring is provided with a cylindrical projection, a projection of the inner ring is divided into a guiding portion having a guiding surface inclining in a state of widening toward the tip thereof, on a side of an inner periphery thereof and an effective length portion having no guiding surface, a relation of a groove width A of the annular groove portion, a thickness width B of the tip of the guiding portion of the projection, and a thickness C of the effective length portion of the projection is B<A<C. According to the present invention, a sealing surface pressure is generated to both axial and radial directions, thereby making it possible to keep an efficient sealing property for a long time, at the same time while it facilitates a control of a fastening torque of the pushing ring.
REFERENCES:
patent: 3649050 (1972-03-01), Woodling
patent: 5154453 (1992-10-01), Nishio
patent: 5388871 (1995-02-01), Saitoh
patent: 5553900 (1996-09-01), Fukumoto
patent: 5743572 (1998-04-01), Nishio
Nicholson Eric K.
Nippon Pillar Packing Co. Ltd.
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