High pressure fluid intensifier and method
US4029440A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 16, 1976 |
| Grant date | Jun 14, 1977 |
| Priority date | — |
| Expiry date | Mar 16, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F38/02
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pressure intensifying apparatus to deliver a very high pressure stream of water through a nozzle. There is a single working piston having two pressure surfaces of a relatively large area, the working piston being connected to two high pressure pistons each having a pressure surface of a relatively small area. A control valve delivers a high pressure working fluid alternately to opposite sides of the working piston to cause it to reciprocate so that the pressure pistons alternately deliver water at high pressure to the nozzle. In shifting between its two end positions, the control valve passes through an intermediate position at which a restricted flow passage is provided for the working fluid, this restricted flow passage having an effective cross sectional area relative to the effective area of the largest size discharge nozzle used with the intensifier, such that the back pressure of the restricted passage of the control valve does not substantially exceed the back pressure exerted on the working fluid so that substantial pressure spikes are not imposed on the high pressure source of working fluid. In another configuration, the control valve in its intermediate position is also…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.