Non cutting hole-shaping and thread-forming stainless screw and process with impact for driving in the same
US6428258B1 · kind B1 · utility
8Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1997 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Sep 24, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B33/008
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hole-shaping and thread-forming screw (1) has a non-cutting hole-shaping end section (2) that ends in a point, a haft section (4) provided with a thread (3) and an engagement section (5). The non-cutting hole-shaping end section (2) tapers towards its end. The whole screw is made of a stainless material, in particular its end section (2). When the screw (1) is driven in, a hole is haped without cutting into the workpiece (7) and is then threaded by the screw (1) itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.