Shut off valve assembly about a shaft of a device having an entry into a vessel
US7237778B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 15, 2004 |
| Grant date | Jul 3, 2007 |
| Priority date | — |
| Expiry date | Dec 27, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S366/608
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention is a shut-off seal assembly for use with the drive assembly of fluid-containing vessels. The shut-off seal assembly first locks the seal carrier of the drive assembly in place so that it may not rotate in a clockwise or a counter-clockwise direction. The seal carrier includes a pair of notches into which a pawl may be fitted preventing seal carrier rotation. The seal carrier surrounds a sleeve which includes a plurality of slots. A backwards rotation of the drive shaft causes drive pins to slide in the angled slots, thereby causing the seal element to move forward and create a seal between the drive assembly and the vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.