Device for compacting granular molding materials
US4572274A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 25, 1983 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Oct 25, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22C15/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The apparatus has a valve arrangement which opens rapidly due to priming or prestressing of the valve plate by the pressure in the pressure chamber. When the valve is closed, pressure, built up in the pressure chamber space closed by the valve, applies a force to the valve member in the direction of its open position. The valve member is held closed by a holder arrangement. Following the development of a predetermined pressure in the pressure chamber, the holder arrangement releases the valve member such that the pressure in the pressure chamber forces the valve member to its open position opening the pressure chamber passage and permitting the pressure medium to surge onto the surface of the molding material. This apparatus is suitable for all high-stressed gases which must be released suddenly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.