System for controlling liquid flow
US4589441A · kind A · utility
Inventor
Key dates
| Filing date | Jul 10, 1984 |
| Grant date | May 20, 1986 |
| Priority date | — |
| Expiry date | Jul 10, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/88038
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A system for controlling the flow of liquid between a reservoir and a liquid source. Passageways are provided between the reservoir and the source for the flow of liquid therebetween. Selectively operable valves, including automatic check valves, are disclosed in various forms of the invention for actuation between a first position for filling the reservoir with liquid from the source and a second position for emptying liquid from the reservoir to the source. The automatic valves prevent the flow of liquid from the reservoir to the source when in the first, filling position and allow the flow of liquid from the reservoir to the source when in the second, emptying position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.