Captive nut
US5393183A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1994 |
| Grant date | Feb 28, 1995 |
| Priority date | — |
| Expiry date | Feb 17, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S411/999
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A captive nut comprises an internally threaded nut body having torque receiving wrench pads and an annular truncated conical surface terminating in a radially extending load transfer surface. The nut body is accepted in a complementary cup-shaped washer having a conical cylindrical wall portion complementary to the conical wall portion of the nut body so as to retain the nut body. An initially truncated conical retention element is disposed between the load transfer surface of the nut body and a radial portion of the cup-shaped washer. Torquing of the nut body toward a workpiece effects deformation of the retention element nut into a complementary annular recess in the bolt thereby permanently capturing the nut on the bolt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.