Expandable head rivet
US5273386A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 18, 1991 |
| Grant date | Dec 28, 1993 |
| Priority date | — |
| Expiry date | Apr 18, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49943
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An expandable head rivet for sealing applications and the like having improved inspectability after setting. The rivet has an axially extending shank, a first substantially cylindrical section and a second tapered section between the first section and the shank, all generally conforming to the hole and counterbores in the workpiece. The face of the rivet head has a raised central section having a substantially flat surface perpendicular to the axis of the rivet of a cross sectional area between 50 and 110% of the cross sectional area of the shank of the rivet. Upon setting of the rivet in the workpiece, the head end of the rivet is flattened and radially expanded to tightly engage the cylindrical counterbore. In the event that the cylindrical counterbore in the workpiece is longer than intended and longer than the corresponding section of the rivet head, the periphery of the endface of the set rivet will be disposed within the counterbore, thereby providing a indication that the counterbore was deeper or longer than expected, and also providing a indication of the possibility that the frustro-conical section of the rivet is not in tight engagement with the frustro-conical counterbo…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.