Fastener head with stabilizing ring
US4759672A · kind A · utility
114Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 8, 1987 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | May 8, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B37/14
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fastener head, preferably a capped fastener head, including a sloping flange surrounding a central wrenching portion, having wrenching surfaces, such as axial hexagonal surfaces. A rib disposed on the sloping flange provides stability to a fastener head having such a rib by increasing the overturning moment required to buckle a column comprised of a fastener and driver. The rib is continuous around the flange and is as high as the bottom of the wrenching surfaces to reduce wobble during driving of the fastener head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.