Dual chamber liquid pump
US6368067B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 22, 2000 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Aug 22, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04F1/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The fluid pump of the present invention includes an upper enclosure for holding fluid (typically a liquid) from a fluid input source, and a lower enclosure for outputting the fluid to an output line. A first valve (a) controls the fluid input flow into the upper enclosure. A second valve (b) is engaged in a line between the upper enclosure and the lower enclosure to control the fluid flow from the upper enclosure to the lower enclosure. A second fluid input line is engaged to the lower enclosure to input a second fluid (typically a pressurized gas) into the lower enclosure, and a third valve (d) is engaged in a line between the lower enclosure and upper enclosure to control the flow of the second fluid into the second enclosure. A fourth valve (c) is engaged in a fluid output line to control the flow of the second fluid out of the upper enclosure. In the preferred embodiments, each of valves a, b, c and d is controlled by an automated pump system controller. Various embodiments of the present invention include further valves and check valves to provide improved control in the system. The preferred embodiment of the dual chamber pump operates by outputting the liquid from the lower …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.