Superhigh pressure control system
US5634773A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1995 |
| Grant date | Jun 3, 1997 |
| Priority date | — |
| Expiry date | Jan 26, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B3/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
First and second boosters 1, 2 which, through reciprocating motions of oil hydraulic cylinders 6a, 6b, pressurize water sucked into plunger chambers 3a, 3b to a superhigh pressure level are connected in parallel to a water discharge line 8, First and second three-position directional control valves 9, 10 are arranged between the oil hydraulic cylinder of each booster and a hydraulic pump 11, 12 so as to cause the hydraulic cylinder to perform a reciprocal movement. The first and second boosters 1, 2 are provided respectively with first and second sets of forward stroke and return stroke sensors (29, 29'; 30, 30') for detecting positions adjacent to respective ends of pressing and suction strokes. During a pressurizing operation of the first booster 1, a control unit 31 causes the second directional control valve 10 to be switched from a suction position to a prepressing position according to a detection signal from the second return stroke sensor 30', and then causes the first three-position directional control valve 9 to be switched from a pressing position to a suction position, and the second three-position directional control valve 10 to be switched from a prepressing position …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.