Metering pump system
US3969046A · kind A · utility
Inventor
Key dates
| Filing date | Jul 12, 1974 |
| Grant date | Jul 13, 1976 |
| Priority date | — |
| Expiry date | Jul 12, 1994 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B13/02
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system for metering and pumping a plurality of fluids is diclosed. The system includes a pumping stage which has a plurality of piston pumps extending from a rigid support to a rack hinged at one end. A valve stage is provided having a valve body with an internal rotatable valve spool. The valve body has several sets of inlet, outlet and common ports communicating with the valve spool, the common ports being connected to the respective pumps. One set of ports is provided for such fluid to be metered and pumped. For each set of ports, the valve spool has a flat portion and a circumferential indentation integral to the flat portion. Alignment of a flat portion of the valve spool with an inlet port of the valve body allows fluid to pass from a supply to the respective pump, and alignment of the flat portion with an outlet port allows the fluid to pass from the pump and out through the outlet port. Means are provided for rotating the valve spool so that the respective fluids are cyclically provided to the respective metering pumps and then allowed to be expelled therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.