Liquid delivery apparatus
US7048145B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jun 26, 2001 |
| Grant date | May 23, 2006 |
| Priority date | — |
| Expiry date | Jul 14, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B12/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A liquid delivery apparatus includes a vessel having an inlet and an outlet, and a valve between the vessel and the outlet. The valve has an opening, a closure member for closing the opening, and a biasing means to hold the valve in a normally-closed position. A valve control mechanism controls operation of the valve in response to pressure of liquid and air in the vessel. A transmitting means transmits the pressure to the valve control mechanism. The valve control mechanism includes a moveable element that can be acted on by the pressure in the vessel and transmit a resultant force to the closure member to thereby open the valve. The respective effective surface areas of the moveable element and the closure member and the force of the biasing means are chosen such that the closure member is openable when the pressure in the vessel reaches a predetermined level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.