High strength blind bolt
US5178502A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 1991 |
| Grant date | Jan 12, 1993 |
| Priority date | — |
| Expiry date | May 24, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B19/1063
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A high strength blind bolt for fastening structural workpieces the blind bolt being of a swage type, pull type construction and having a pin member with a plurality of locking grooves, a main sleeve, an expandable sleeve and a collar adapted to be swaged into the lock grooves, the main sleeve having a tapered nose portion adapted to radially expand the expandable sleeve in response to the application of a preselected relative axial force applied between the pin member and the collar, the tapered nose portion being defined by a preselected small angle to limit the radial expansion of the expandable sleeve to provide a high strength blind head for engaging the adjacent, blind side of the structural workpieces and to initially clamp the structural workpieces together at a high clamp load and to provide a final high, residual clamp load upon swaging of the collar into the lock grooves of the pin member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.