High speed self switching valve for producing from a constant pressure fluid source a series of repetitive and variable fluid pulses
US5579806A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 28, 1995 |
| Grant date | Dec 3, 1996 |
| Priority date | — |
| Expiry date | Aug 28, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86413
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A valve for producing from a constant pressure fluid source a series of repetitive fluid pulses, comprises a valve body having an inlet chamber, an outlet chamber and a control chamber, each defined in the valve body. An inlet duct connects the inlet chamber to a source of fluid at a substantially constant pressure. A valve seat is positioned between the inlet chamber and the outlet chamber and a valve member is movable along an axis of the valve body in opposed axial directions between a first closed position wherein the valve member rests on the valve seat and a second open position in which the valve member separates from the valve seat allowing fluid flow from the inlet chamber to the outlet chamber. The valve member has a piston movable therewith mounted in the control chamber for sliding movement, the piston having a piston face presented to pressure of fluid in the control chamber such that changes in the pressure of the fluid in the control chamber tend to move the piston and the valve member between the first closed position and the second open position. Fluid control is provided by a first control channel bleeding fluid from the inlet chamber to the control chamber at a f…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.