Thread forming tap
US-11110531-B2 · Sep 7, 2021 · US
Thread forming tap
US8998734B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8998734-B2 |
| Application number | US-200913379535-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 7, 2009 |
| Priority date | Jul 7, 2009 |
| Publication date | Apr 7, 2015 |
| Grant date | Apr 7, 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.
A thread forming tap has a full thread portion and a leading portion contiguous with the full thread portion and reducing in diameter toward its tip. The full thread and leading portions are provided with external thread on which lobes and recesses are alternately formed. When δ represents an angle around a tool center line toward a thread forming side, the shape of the lobe varies along a quadratic curve relative to angle δ so that relief amount increases toward inflection point angle δ. However, in a rough plastic deformation section where angle δ is greater than inflection point angle θ and exceeds the working region, the shape varies along an Archimedean curve with clearance angle α 1 so that the relief amount increases linearly relative to angle δ, and a margin section is substantially zero or within a range where angle δ is less than or equal to 1°.
First claim
Opening claim text (preview).
The invention claimed is: 1. A thread forming tap having a full thread portion and a leading portion disposed contiguous with the full thread portion and reducing in diameter toward its tip, the full thread portion and the leading portion being provided with an external thread on which lobes and recesses are alternately formed, wherein when, with respect to a shape around a tool center line O of the lobe in the leading portion, δ represents an angle around the tool center line O t…
Assignees
Inventors
Classifications
- B23G7/02Primary
Operations & Transport · mapped topic
Cross-Sectional Technologies · 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 US8998734B2 cover?
- A thread forming tap has a full thread portion and a leading portion contiguous with the full thread portion and reducing in diameter toward its tip. The full thread and leading portions are provided with external thread on which lobes and recesses are alternately formed. When δ represents an angle around a tool center line toward a thread forming side, the shape of the lobe varies along a quad…
- Who is the assignee on this patent?
- Norimatsu Kentaroh, Matsushita Takayuki, Yamamoto Hironori, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification B23G7/02. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Apr 07 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).