Screw with tamper-proof head
US6626627B2 · kind B2 · utility
8Cited by
12References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1999 |
| Grant date | Sep 30, 2003 |
| Priority date | — |
| Expiry date | Nov 20, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S411/91
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A screw (1) is provided with a shank (3), a head (2) and a boring part (5). The shank (3) is provided with a thread (4). The head (2) has a shoulder (6) disposed at an axial distance (B) from the bearing face (12), while a portion (7) adjoining the shoulder on the shank side is provided with a tool drive (8). The head (2) of the screw can therefore be seized in axially secure manner by a tool in the region of the shoulder (6), and this tool can then simultaneously transmit the necessary torque in the region of the tool drive (8) as well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.