Multi-headed screw
US4502825A · kind A · utility
28Cited by
12References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 1, 1982 |
| Grant date | Mar 5, 1985 |
| Priority date | — |
| Expiry date | Feb 1, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S411/91
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A screw member having a plurality of heads by providing one or more thin neck portions between them to be sheared at a predetermined torque, wherein a cap member surrounding the outer periphery of an inner head part from the side of its bearing surface is engaged with the inner head part so as not to displace outwardly slipping out of it, and the inner peripheral surface of the cap member is made conformable to a shape of the outer peripheral surface of a socket of a screw driving tool to be fitted on the inner head part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.