Check valve with a spiral coil seal
US7357172B2 · kind B2 · utility
3Cited by
10References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2004 |
| Grant date | Apr 15, 2008 |
| Priority date | — |
| Expiry date | Apr 16, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D17/203
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A seal for a check valve for a metal molding machine. The seal is provided by the combination of a peripheral groove in an outer surface of the check valve and a helically wound core in the groove. The helically wound coil is expandable into sealing engagement with a cylindrical wall of the molding machine. The helically wound coil may be movable laterally in the groove between a melt channel open position and a melt channel closed position to open or seal the melt channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.