Fastener having an axially and radially undulating flange
US4490082A · kind A · utility
9Cited by
10References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1983 |
| Grant date | Dec 25, 1984 |
| Priority date | — |
| Expiry date | Jun 8, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B39/282
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A screw adapted for use with thin sheet metal. The screw has a threaded shank and a head with an integral flange. The flange has both radial and axial undulations which increase the amount of torque required to strip the screw. The undulations are formed at the outer edge of the flange and on the under surface of the flange and are adapted to engage a workpiece upon threaded advancement of the screw.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.