Method for replacing a tacking fastener
USRE39582E1 · kind E1 · reissue
Assignee
Inventor
Key dates
| Filing date | Mar 6, 2002 |
| Grant date | Apr 24, 2007 |
| Priority date | — |
| Expiry date | Mar 6, 2022 |
Classification
- Technology area (CPC —)General
Abstract
A temporary fastener that fastens two adjacent workpieces. The fastener includes a shank that extends through a hole of the workpieces. Extending from one end of the shank is a conical shaped head. The fastener also contains a pull stem which has a head located adjacent to the blind end of the shank. The stem head is pulled through the shank to expand and tightly fasten the shank to the workpieces. The fastener is removed by drilling through the head and the shank. The diameter of the conical shank head is smaller than the diameter of the drill so that part of the head does not become attached to the drill bit and scratch the workpiece. The conical shape of the head also reduces the volume of fastener material to further reduce the size and amount of chips produced during the drilling process. The tightly engaged shank prevents the fastener from rotating during the drilling operation. A method of replacing a tacking fastener that temporarily joins two adjacent workpieces with a permanent fastener to permanently join the workpieces. A drill bit is engaged with an inner channel of the temporary fastener at a head of the fastener. The drill bit has a diameter larger than the head dia…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.