High speed self switching valve for producing from a constant pr

Details High speed self switching valve for producing from a constant pr High speed self switching valve for producing from a constant pr

1995-08-28

1996-12-03

Lee, Kevin

Fluid handling

Systems

Programmer or timer

251324, F16K 31122

Patent

active

055798063

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 first controlled rate and a second control channel bleeding fluid from the control chamber to a discharge vent at a second controlled rate different from the first controlled rate. A valve element in the fluid control channel operated by movement of the valve member for opening and closing the flow of fluid through the fluid control channel increases and decreases the fluid pressure in The control chamber so as to cause movement of the valve member.

REFERENCES:
patent: 3053461 (1962-09-01), Inglis
patent: 4267856 (1981-05-01), Kwok et al.
patent: 4465090 (1984-08-01), Morgan et al.
patent: 5000516 (1991-03-01), Kolle et al.
patent: 5025962 (1991-06-01), Renfro
Article by Kwok et al "A Liquid Operated Oscillator" (1 page).
Paper by Voisekhovskii et al "The Use of Pulsed Two-Dimensional High-Speed Liquid Jets for Breaking up Exhausted Assemblies of Fuel Elements of Atomic Power Stations" (1 page).

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