Self-plugging blind fastener
US4907922A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1989 |
| Grant date | Mar 13, 1990 |
| Priority date | — |
| Expiry date | Jul 14, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B19/1054
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A self-plugging blind fastener of the type having a tubular, headed, body, and a stem which is pulled and locked relative to the body to set the fastener, has improved locking means provided in the form of a deformable annular locking collar which is disposed on the stem, a locking groove on the plug part of the stem, and an annular recess at the head end of the body provided as an enlargement of the bore. The recess has a generally cylindrical outer region of substantially greater diameter than the main region of the bore, and a tapered inner region in which the diameter of the recess reduces to that of the main region of the bore. The recess can be stepped between the outer and inner regions. The locking collar has a locking portion of small external diameter which seats in the inner region of the recess, and a load-bearing head portion of larger diameter, and more massive, than the locking portion, but which can be forced into the outer region of the recess, causing the locking portion to be urged radially inwardly. The locking portion is supported by the stem until the locking groove comes into register with the recess, after which the collar can be forced further into the rece…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.