Structure of resin-made pipe joint
US-10571060-B2 · Feb 25, 2020 · US
Inner ring and pipe joint
US2023151911A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2023151911-A1 |
| Application number | US-202117916306-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 9, 2021 |
| Priority date | Jun 9, 2020 |
| Publication date | May 18, 2023 |
| Grant date | — |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
An inner ring of a pipe joint includes a first tapered surface formed at one axial end portion of an inner circumferential surface such that a diameter thereof gradually increases from another axial side toward one axial end thereof in a state before a bulge portion is press-fitted into an end portion of a tube. A diameter increase starting point of the first tapered surface is located in a range from a deformation starting point, which serves as a starting point from which an inner circumferential surface is deformed due to the bulge portion receiving external force from the tube when the bulge portion is press-fitted into the end portion of the tube, to a position, on the inner circumferential surface, corresponding to one axial end of an outer circumferential surface of a body portion.
First claim
Opening claim text (preview).
1 . An inner ring comprising: a bulge portion formed at one axial end portion such that an outer circumferential surface thereof projects toward a radially outer side, and to be press-fitted into an end portion of a tube; a press-fitting portion formed at another axial end portion and to be press-fitted into an end portion of a joint body; and a cylindrical body portion formed between the bulge portion and the press-fitting portion and having a constant outer diameter over an entirety in an axial direction, the outer diameter being smaller than a maximum outer diameter of the bulge portion, wherein a fluid flow passage is formed inside an inner circumferential surface of the inner ring, the inner ring includes a tapered surface formed at one axial end portion of the inner circumferential surface such that a diameter thereof gradually increases from another axial side toward one axial end thereof in a state before the bulge portion is press-fitted into the end portion of the tube, and a diameter increase starting point of the tapered surface is located in a range from a deformation starting point, which serves as a starting point from which the inner circumferential surface is deformed due to the bulge portion receiving external force from the tube when the bulge portion is press-fitted into the end portion of the tube, to a position, on the inner circumferential surface, corresponding to one axial end of an outer circumferential surface of the body portion. 2 . The inner ring according to claim 1 , wherein a maximum outer diameter portion having a maximum outer diameter is formed at the outer circumferential surface of the bulge portion over a predetermined length in the axial direction, and the diameter increase starting point of the tapered surface is located in a range, in the inner circumferential surface, corresponding to a range of the predetermined length of the maximum outer diameter portion. 3 . The inner ring according to claim 2 , wherein the deformation starting point is located at a position, on the inner circumferential surface, corresponding to one axial end of the maximum outer diameter portion, and the diameter increase starting point of the tapered surface is located on the deformation starting point. 4 . An inner ring comprising: a bulge portion formed at one axial end portion such that an outer circumferential surface thereof projects toward a radially outer side, and to be press-fitted into an end portion of a tube; a press-fitting portion formed at another axial end portion and to be press-fitted into an end portion of a joint body; and a cylindrical body portion formed between the bulge portion and the press-fitting portion and having a constant outer diameter over an entirety in an axial direction, the outer diameter being smaller than an outer diameter of the press-fitting portion, wherein a fluid flow passage is formed inside an inner circumferential surface of the inner ring, the inner ring includes a tapered surface formed at another axial end portion of the inner circumferential surface such that a diameter thereof gradually increases from one axial side toward another axial end thereof in a state before the press-fitting portion is press-fitted into the end portion of the joint body, and a diameter increase starting point of the tapered surface is located in a range from a deformation starting point, which serves as a starting point from which the inner circumferential surface is deformed due to the press-fitting portion receiving external force from the joint body when the press-fitting portion is press-fitted into the end portion of the joint body, to a position, on the inner circumferential surface, corresponding to another axial end of an outer circumferential surface of the body portion. 5 . The inner ring according to claim 4 , wherein the diameter increase starting point of the tapered surface is located on the deformation starting point. 6 . A pipe joint comprising: a joint body having an external thread portion formed on an outer circumference thereof; a union nut having an internal thread portion formed on an inner circumference thereof and to be tightened to the external thread portion; and the inner ring according to 7 . A pipe joint comprising: a joint body having an external thread portion formed on an outer circumference thereof; a union nut having an internal thread portion formed on an inner circumference thereof and to be tightened to the external thread portion; and the inner ring according to claim 4 .
Assignees
Inventors
Classifications
the plastic pipe end being flared either before or during the making of the connection · CPC title
- F16L19/0283Primary
and having a bell-mouthed shape · CPC title
with means not mentioned in the preceding groups for gripping the hose between inner and outer parts · CPC title
with non-metallic packing · CPC title
- F16L19/05Primary
with a rigid pressure ring between the screwed member and the exterior of the flared pipe end · CPC title
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Frequently asked questions
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- What does patent US2023151911A1 cover?
- An inner ring of a pipe joint includes a first tapered surface formed at one axial end portion of an inner circumferential surface such that a diameter thereof gradually increases from another axial side toward one axial end thereof in a state before a bulge portion is press-fitted into an end portion of a tube. A diameter increase starting point of the first tapered surface is located in a ran…
- Who is the assignee on this patent?
- Nippon Pillar Packing
- What technology area does this patent fall under?
- Primary CPC classification F16L19/0283. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Thu May 18 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).