Concrete and masonry screw anchor
US8430619B2 · kind B2 · utility
4Cited by
15References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2010 |
| Grant date | Apr 30, 2013 |
| Priority date | — |
| Expiry date | Sep 1, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B25/0047
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A screw anchor includes a body having a head end that extends to a tip end through an intermediate portion defining an axis of the screw anchor, and a plurality of threads extending along the intermediate portion. Each of the plurality of threads includes a head side surface having a first angle relative to an axis perpendicular to the axis of the screw, and a tip side surface having a second angle relative to the axis perpendicular to the axis of the screw. The first angle is between about 30° and about 40°, and the second angle is between about 15° and about 25°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.