Check valve lip seal for an injection molding machine
US7291006B2 · kind B2 · utility
2Cited by
16References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 24, 2004 |
| Grant date | Nov 6, 2007 |
| Priority date | — |
| Expiry date | Aug 21, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7904
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A check valve for a molding machine. The check valve has a stem portion and a ring portion movable along said stem portion between a melt channel open position and a melt channel closed position. A groove is formed in a forward face of the ring portion. The groove, in operation, receives melt to force an outer circumferential portion of the ring in a radial direction to provide a seal between the ring portion and a wall in the machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.