Threaded connection with high bend and torque capacities
US-2016376850-A1 · Dec 29, 2016 · US
Threaded joint for steel pipes
US8991875B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8991875-B2 |
| Application number | US-201214006245-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 24, 2012 |
| Priority date | Mar 22, 2011 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
Provided is a threaded joint for steel pipes having high sealability even under a bending load. In the threaded joint, when a pin 3 and a box 1 are threadedly connected with each other, the outer peripheral face of a nose 8 of the pin and the inner peripheral face of a nose of the box are in metal-to-metal contact with each other at a contact portion and the contact portion serves as a seal portion 20 . A threaded portion, at which the externally threaded portion 7 and the internally threaded portion 5 are threadedly connected with each other, has a negative load flank angle α, shoulder portions 12 and 14 have a negative torque shoulder angle β, and the ratio L/d 0 of a length L of the nose and a pipe outside diameter d 0 is equal to or higher than 0.08.
First claim
Opening claim text (preview).
The invention claimed is: 1. A threaded joint for steel pipes comprising: a pin including an externally threaded portion, a nose extending from the externally threaded portion toward an end of a pipe, and a shoulder portion disposed at a distal end of the nose; and a box including an internally threaded portion that forms a threaded portion by being threadedly connected with the externally threaded portion, an inner peripheral face that faces an outer peripheral face of the nose…
Assignees
Inventors
Classifications
Fixed Constructions · mapped topic
- F16L15/001Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US8991875B2 cover?
- Provided is a threaded joint for steel pipes having high sealability even under a bending load. In the threaded joint, when a pin 3 and a box 1 are threadedly connected with each other, the outer peripheral face of a nose 8 of the pin and the inner peripheral face of a nose of the box are in metal-to-metal contact with each other at a contact portion and the contact portion serves as a se…
- Who is the assignee on this patent?
- Yoshikawa Masaki, Nagahama Takuya, Chikatsune Hiroshi, and 6 more
- What technology area does this patent fall under?
- Primary CPC classification F16L15/001. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Mar 31 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).