Deck screw
US7988396B2 · kind B2 · utility
17Cited by
19References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2007 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | Nov 9, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B2033/025
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fastener for composite material having a dense composition employs a head which has a socket and a recessed underside and a lower rim. The shank has an upper portion with an enlarged diameter and a left hand thread while the lower portion has a tri-lobed configuration and is traversed by a right hand thread. The right hand thread may have a plurality of notches which, in one embodiment, are arranged in a spiral array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.