Method of manufacturing a suspension coil spring
US-10583706-B2 · Mar 10, 2020 · US
Vertical motion impeller-type shot peening device and coil spring
US10836013B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10836013-B2 |
| Application number | US-201916383231-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 12, 2019 |
| Priority date | Aug 20, 2014 |
| Publication date | Nov 17, 2020 |
| Grant date | Nov 17, 2020 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A coil spring includes a helically formed wire having end turn portions at ends thereof, a plurality of first rough surfaces, each including first shot peening indentations formed on a part of a surface of the end turn portions, and a second rough surface including second shot peening indentations formed on the entire surface of the wire except for the first rough surface. The second rough surface has a surface roughness different from that of the first rough surface.
First claim
Opening claim text (preview).
What is claimed is: 1. A coil spring comprising a helically formed wire and having end turn portions at ends thereof, the coil spring comprising: a plurality of first rough surfaces, each including first shot peening indentations formed on a part of a surface of the end turn portions; and a second rough surface including second shot peening indentations formed on the entire surface of the wire except for the first rough surface, the second rough surface having a surface roughness different from that of the first rough surface. 2. The coil spring of claim 1 , wherein the surface roughness of the second rough surface is less than that of the first rough surface. 3. The coil spring of claim 1 , wherein the first rough surfaces are scattered at intervals on the end turn portions in a winding direction. 4. The coil spring of claim 3 , wherein the first rough surfaces on a lower end turn portion are formed on a lower surface of the lower end turn portion in a state where the coil spring is standing substantially vertically. 5. The coil spring of claim 4 , wherein the first rough surfaces on an upper end turn portion are formed on an upper surface of the upper end turn portion in a state where the coil spring is standing substantially vertically.
Assignees
Inventors
Classifications
Surface treatments · CPC title
Wound springs {(making springs by coiling wire B21F3/00)} · CPC title
Covers or coatings therefor (F16F1/24 takes precedence) · CPC title
- B24C1/10Primary
for compacting surfaces, e.g. shot-peening (for deforming sheet metal, tubes or profiles B21D31/06; as a metallurgical treatment C21D7/00, C22F1/00) · CPC title
Apparatus using impellers · CPC title
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Frequently asked questions
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- What does patent US10836013B2 cover?
- A coil spring includes a helically formed wire having end turn portions at ends thereof, a plurality of first rough surfaces, each including first shot peening indentations formed on a part of a surface of the end turn portions, and a second rough surface including second shot peening indentations formed on the entire surface of the wire except for the first rough surface. The second rough surf…
- Who is the assignee on this patent?
- Nhk Spring Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B24C1/10. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Nov 17 2020 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 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).