Vertical motion impeller-type shot peening device and coil spring
US10836013B2 · kind B2 · utility
0Cited by
15References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2019 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | May 29, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F2226/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.