Method of making a seal nut
US4367060A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 2, 1980 |
| Grant date | Jan 4, 1983 |
| Priority date | — |
| Expiry date | Jun 2, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B33/004
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An improved method of manufacturing a sealing nut having a sealing ring insert is disclosed. The process eliminates the costly step of machining an undercut into the counterbore of the nut blank to provide a means for retaining the sealing ring in place. This is accomplished by leaving a predetermined amount of excess material protruding around the periphery of the counterbore when the counterbore is initially cold formed. When the bearing surface is subsequently flattened by an additional cold forming step, the excess material is forced radially inwardly thereby reducing slightly the diameter of the counterbore at the bearing surface of the nut. The elimination of the undercutting operation also results in a nut having improved torque and load bearing characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.