Discharge pressure-dependant variable-capacity radial plunger pump
US4601641A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 1985 |
| Grant date | Jul 22, 1986 |
| Priority date | — |
| Expiry date | Jul 24, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B1/08
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The radial plunger pump has a rotor in which a plurality of plungers are radially slidingly received and have their outer ends in engagement with a guide ring which is provided so as to be eccentric from the rotor, so that the plungers reciprocate in their cylinders as the rotor rotates. The eccentric amount is controlled by the movement of a controlling piston, and the movement of the controlling piston is controlled by a pilot valve. The pilot valve which has a sleeve and a shaft member, switches the pressure in a chamber formed behind the controlling piston in order to control the movement of the controlling piston. The position of the shaft member of the pilot valve is further controlled by an electrical control, so that the critical point at which the pilot valve switches the pressure is controlled by the electrical control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.