Shearable screw
US6176659A · kind A · utility
22Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 17, 1999 |
| Grant date | Jan 23, 2001 |
| Priority date | — |
| Expiry date | Aug 17, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B31/021
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a tear-off cap or shearable screw (1) comprising a plurality of thread portions (3) and a cap portion (5) connected with the thread portions (3) via a first predetermined breaking point (7), wherein further predetermined breaking points (9) in the form of cross-section tapering are provided between the thread portions (3). The present invention distinguishes itself by the fact that the tear-off torques both increase and decrease from the most remote thread portion towards the cap portion (5), this forming at least one stepped predetermined breaking point (13).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.