High pressure water pump system having a reserve booster pump
US5639218A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1995 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Apr 5, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B9/1172
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A superhigh pressure generator system is provided which comprises first, second and reserve boosters 1, 2, 3 which are respectively provided with a plunger chambers 4a, 4b, 4c within single rod-type oil hydraulic cylinders 7a, 7b, 7c on the plunger side and are operative to pressurize water sucked into the respective plunger chambers to superhigh pressure, the boosters being connected in parallel each other to a water discharge line 9 via check valves 6a, 6b, 6c respectively. First, second and reserve 3-position directional control valves 13, 14, 15 are interposed between the oil hydraulic cylinders 7a, 7b, 7c of the respective boosters on one hand and first and second oil hydraulic pumps 11, 12 on the other hand so as to permit a reciprocating motion of the oil hydraulic cylinders. On-off valves 20, 21, 23, 22 are respectively provided on discharge lines 17, 18, 19, 16 which connect the three-position directional control valves 13, 14, 15 to the first and second oil hydraulic pumps 11, 12. In this way, the use of a single acting oil cylinder for reserve purposes enables continued operation in the event of seal failure and provides for cost and size reduction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.