公开(公告)号：US20230045298A1

公开(公告)日：2023-02-09

申请号：US17791499

申请日：2020-10-13

Applicant: NIPPON PILLAR PACKING CO., LTD.

Inventor： Tomoyuki KOIKE ,  Hiroki SAKAMOTO ,  Shingo HIGUCHI ,  Kiyotaka OHMAE ,  Tomohiro ADACHI

IPC: F16L47/04 ,  F16L43/00

Abstract: A resin joint includes a joint body having a flow path, sleeves, and union nuts that fix tubes to the joint body. The joint body has a body portion with a curved inner peripheral surface and a straight portion protruding from an end portion of the body portion. The straight portion has outer and inner cylindrical portions radially arranged inside the outer cylindrical portion. An end portion of the inner cylindrical portion is positioned closer to the body portion than is an end portion of the outer cylindrical portion. A groove portion extending parallel with the outer and inner cylindrical portions in an axial direction is formed between an inner peripheral surface of the outer cylindrical portion and an outer peripheral surface of the inner cylindrical portion. The tube is fixed to the joint body such that a press-fit portion of the sleeve is press-fitted in the groove portion.

公开(公告)号：US20230349492A1

公开(公告)日：2023-11-02

申请号：US18041746

申请日：2021-06-04

Applicant: NIPPON PILLAR PACKING CO., LTD.

Inventor： Kiyotaka OHMAE ,  Masashi KATANAYA ,  Ayumi KUROSAKI ,  Shingo HIGUCHI ,  Kazukiyo TESHIMA

IPC: F16L17/067

CPC classification number: F16L17/067

Abstract: A tapered surface 14 is formed at each axially outer end portion of an inner circumferential surface 3a of a gasket 3 such that a diameter thereof gradually increases from an axially inner side toward an axially outer end thereof in a state before an annular primary sealing portion 11 of the gasket 3 is press-fitted into an annular primary sealing groove 2b of a fluid device 2. A diameter increase starting point P1 of the tapered surface 14 is located in a range R from a deformation starting point position P2 serving as a starting point from which the inner circumferential surface 3a is deformed due to the primary sealing portion 11 receiving external force form the fluid device 2 when the primary sealing portion 11 is press-fitted into the primary sealing groove 2b, to a center position P3 in an axial direction of the inner circumferential surface 3a.

公开(公告)号：US20220018471A1

公开(公告)日：2022-01-20

申请号：US17296044

申请日：2019-05-14

Applicant: NIPPON PILLAR PACKING CO., LTD.

Inventor： Kiyotaka OHMAE ,  Masashi KATANAYA ,  Atsushi NAKANO

IPC: F16L19/028 ,  F16L47/04

Abstract: A sleeve, a cylindrical member for connecting a tube to a tubular body of a fitting, includes a first peripheral wall end portion facing a peripheral wall end portion of the tubular body, and a second peripheral wall end portion pressed into an open end of the tube. The first peripheral wall end portion includes either an annular protrusion or groove. The annular protrusion is pressed into an annular groove in the peripheral wall end portion of the tubular body. The annular groove allows an annular protrusion axially projecting from the peripheral wall end portion of the tubular body to be pressed thereinto. The second peripheral wall end portion includes a bulge portion to expand the diameter of the open end of the tube. An outer periphery of the first peripheral wall end portion includes a flange to axially face the peripheral wall end portion of the tubular body.

公开(公告)号：US20230341052A1

公开(公告)日：2023-10-26

申请号：US17909136

申请日：2021-01-14

Applicant: NIPPON PILLAR PACKING CO., LTD.

Inventor： Kiyotaka OHMAE ,  Masashi KATANAYA

IPC: F16J15/10 ,  F16L41/03

CPC classification number: F16J15/106 ,  F16L41/03

Abstract: A flow passage unit 1 includes a base plate 2 and a plurality of fluid devices 3 provided on the base plate 2. The plurality of fluid devices 3 include a first fluid device 31 having a first flow passage hole 31b, and a second fluid device 32 having a second flow passage hole 32b. The first fluid device 31 is disposed on an upper side of the base plate 2 and detachably provided on the base plate 2, and the second fluid device 32 is disposed on a lower side of the base plate 2 and detachably provided on the base plate 2. The base plate 2 has a first through hole 21 formed so as to penetrate the base plate 2 in a thickness direction of the base plate 2 to provide communication between the first flow passage hole 31b and the second flow passage hole 32b.

公开(公告)号：US20230039578A1

公开(公告)日：2023-02-09

申请号：US17792748

申请日：2021-01-14

Applicant: NIPPON PILLAR PACKING CO., LTD.

Inventor： Ayumi KUROSAKI ,  Shingo HIGUCHI ,  Kazukiyo TESHIMA ,  Kiyotaka OHMAE ,  Masashi KATANAYA

IPC: F16L19/05 ,  F16J15/10

Abstract: An inner ring 4 of a pipe joint 1 includes a cylindrical body portion 5 having a communication hole 5a for providing communication between flow passage holes 2c and 8a of a joint body 2 and a tube 8, and an annular primary sealing portion 11 projecting from a radially inner side of an axially outer end portion of the body portion 5 toward an axially outer side and to be press-fitted into an annular primary sealing groove 2d formed on the joint body 2. The primary sealing portion 11 is formed so as to be tapered from an axially inner end thereof toward an axially outer end thereof in an axial cross-sectional view, and has a flat surface 11c extending from a radially outer end 11b of the axially outer end thereof toward the radially inner side.

公开(公告)号：US20220025996A1

公开(公告)日：2022-01-27

申请号：US17311478

申请日：2019-05-14

Applicant: NIPPON PILLAR PACKING CO., LTD.

Inventor： Kiyotaka OHMAE ,  Masashi KATANAYA ,  Atsushi NAKANO

IPC: F16L19/02

Abstract: A first peripheral wall end portion of a conversion adapter is connected to a tubular body across a gasket, and has either an annular protrusion to be pressed into an annular groove on a side surface of the gasket, or an annular groove to allow an annular protrusion projecting from a side surface of the gasket to be pressed thereinto. The first peripheral wall end portion has either an internally threaded portion to allow an externally threaded portion of the tubular body to be screwed thereinto, or an externally threaded portion to allow a nut to be screwed thereonto. The nut also allows an externally threaded portion of the tubular body to be screwed thereinto. A second peripheral wall end portion of the conversion adapter has an externally threaded portion to allow another nut to be screwed thereonto, and then, to allow the sleeve to make contact with the inside.

公开(公告)号：US20210317932A1

公开(公告)日：2021-10-14

申请号：US17272111

申请日：2019-06-12

Applicant: NIPPON PILLAR PACKING CO., LTD.

Inventor： Kiyotaka OHMAE ,  Masashi KATANAYA

IPC: F16L19/02 ,  F16L15/04 ,  F16L17/06

Abstract: A flow passage joint structure includes: a first external thread portion formed, at an end portion of first piping block, radially outward of flow passage hole; a second external thread portion formed, at an end portion of second piping block, radially outward of flow passage hole; a union nut having a first internal thread portion to be screwed to the first external thread portion, on one side in an axial direction thereof, and having a second internal thread portion to be screwed to the second external thread portion, on another side in the axial direction thereof; and a gasket configured to seal a connection portion between the flow passage holes on a radially inner side of the union nut. The first external thread portion and the first internal thread portion are right-hand threads, and the second external thread portion and the second internal thread portion are left-hand threads.