Fastener and screw means therefor
US5636956A · kind A · utility
4Cited by
5References
11Claims
0Family size
Inventors
Key dates
| Filing date | Jul 11, 1995 |
| Grant date | Jun 10, 1997 |
| Priority date | — |
| Expiry date | Jul 11, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B37/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fastener is a screw having a threaded shaft, and a fastening strip or sheet having a raised portion provided with an aperture being preformed to have an at least partly helical threadform-defining edge shaped and dimensional to matingly receive the threaded shaft of the screw. The crests of the threaded shaft have an asymmetrical surface profile in the axial direction of the threaded shaft which enables the shaft to withstand greater applied torque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.