Cold forming dies and cold forming process
US4945749A · kind A · utility
57Cited by
14References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1989 |
| Grant date | Aug 7, 1990 |
| Priority date | — |
| Expiry date | Oct 30, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Progressive step and compound dies are employed in a cold working process to form a metallic preform of selected mass into a precision-finished, pore-free, annular bushing with a mass substantially equal to that of the preform for use as a battery terminal which allows the fracture free spin over connection of the stem of the bushing to a battery cover and the close fit of the bushing on the battery post when the cover is fitted to the battery casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.