Closure assemblies for stores of flowable material
US7334710B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Aug 25, 2004 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Dec 4, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2590/547
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The closure assembly comprises a first closure device in the form of a cone valve typically having a downwardly diverging upper surface and a second closure device in the form of a plug which is vertically slidable relative to the first closure device so that when in use the closure assembly is opened by a closure operating member acting on the plug, the plug will move upwardly from a closed to an open condition while the cone valve remains in a closed condition and subsequently the cone valve will move upwardly from its closed to an open condition. The cone valve comprises first and second parts, the first part being more flexible than the second part and being arranged to adopt a closed position relative to the store prior to the second part adopting a closed position relative to the store during a closing operation of the closure assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.