Fastener head with internal recess having a radial slot configuration and installation tool therefor
US5366330A · kind A · utility
37Cited by
5References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 26, 1993 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Jul 26, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S411/919
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A fastener head having a pair of recesses formed therein, a ledge in each recess being located a short distance axially below the head surface and extending a predetermined angular length from the axial portion of the ledge. The dimension of the ledge is adjustable to accommodate the strength of the fastener material in a manner such that the displacement formation of recess material on the surface of the fastener head is prevented during normal installation procedures. The drive angle on the recess is designed to be zero degrees.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.