Self-piercing riveting
US8070406B2 · kind B2 · utility
13Cited by
5References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 10, 2007 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Nov 28, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/4991
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A self-piercing rivet for forming joints in high strength steel has a partially hollow shank of a particular form in order to ensure that it has sufficient column strength to pierce the material. The thickness of the shank is such that adequate joint strength is achieved with a lower degree of flare than would be necessary for conventional riveted joints. The ratio of the thickness of the shank (outside diameter minus inside diameter) is in the range 0.47 to 0.52. The ratio of the cross sectional area of the shank in the region around the bore to the outside diameter of the shank is in the range 3.0:1 to 3.6:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.