Press containing a pressure cell with a flexible diaphragm and a forming pad influenced by said diaphragm
US3938361A · kind A · utility
9Cited by
6References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1974 |
| Grant date | Feb 17, 1976 |
| Priority date | — |
| Expiry date | Dec 5, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D22/12
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In a hydraulic press which includes a pressure cell with a diaphragm of flexible material which is intended to press a pad of flexible material against forming pieces in a working space below the pad, the diaphragm has an opening with an annular bead therearound. Two disc-like attachment members are provided, which form between them an annular groove which fits the bead of the diaphragm. Between the bead and one of the attachment members there is formed an annular groove within which is a sealing ring which engages between the bead and at least one of the annular members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.