Fasteners for composite material
US8430618B2 · kind B2 · utility
19Cited by
78References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2011 |
| Grant date | Apr 30, 2013 |
| Priority date | — |
| Expiry date | Dec 5, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B35/06
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fastener has a shaft, a head at a first end of the shaft, and a point at the other end of the shaft. A first portion of the shaft adjacent the point is threaded. The first portion typically extends about one-half the total length of the shaft. A second portion of the shaft (adjacent the head) is not threaded, but has a plurality of spaced rings. A knurled portion can be provided between the first and second portions, if desired. Conventional symmetrical or asymmetrical thread can be used in the threaded portion, or a three lobe thread can be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.