Devices for manufacturing annular frames for seals and to the corresponding frames and seals
US4516421A · kind A · utility
1Cited by
2References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 13, 1982 |
| Grant date | May 14, 1985 |
| Priority date | — |
| Expiry date | Sep 13, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D53/18
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
To produce an annular metal frame having an L shaped half-section for a lipped seal, a metal strip is cut into lengths, each of these lengths is rolled up circularly until its two ends are in abutment, so as to form a cylindrical ring (7), then this ring is driven into the cavity of small thickness defined between two parallel guide surfaces (S, S'), the entrance to said cavity having a shape complementary to that of the ring and the bottom of the cavity having a shape complementary to that of the frame to be produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.