US 2001/0040227 A1Published application

Controlled valve

AssigneeNetafim (A.C.S.) Ltd.

InventorsAVI ZAKAI, YOUVAL KATZMAN, VLADIMIR RYABTSEV

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Abstract

A hydraulic diaphragm valve comprising a housing, an inlet, an outlet, a diaphragm valve seating between the inlet and the outlet, a sealing diaphragm mounted in the housing and displaceable about the diaphragm valve seating, so as to close and open a flow path between the inlet and outlet, a valve control chamber and a command valve comprising a first duct communicating at one end thereof with the valve inlet, and at an opposite end thereof with a first command valve seating, a second duct communicating into one end with the valve outlet, and at an opposite end thereof, with a second command valve seating. A third duct communicates at one end with the valve control chamber and at its opposite end it selectively communicates with the first and second command valve seatings. A flexible command diaphragm is selectively biased into sealing engagement with one or other of the command valve seatings to effect communication between the third duct and the command valve seating not in sealing engagement with the command diaphragm.

Claims25

Dependent claims

A hydraulic diaphragm valve comprising a main valve housing;

a valve inlet and a valve outlet;
a diaphragm valve seating formed in said housing and located in a flow-path between said inlet and said outlet;
a sealing diaphragm mounted in said housing and displaceable towards and away from said diaphragm valve seating so as to close and open said flow path;
a valve control chamber defined between said sealing diaphragm and said housing, and outside said flow-path;
a command valve associated with said valve housing and comprising a first duct communicating at one end thereof with said valve inlet and, at an opposite end thereof, with a first command valve seating;
a second duct communicating at one end thereof with said valve outlet and, at an opposite end thereof, with a second command valve seating;
a third duct communicating at one end thereof with said valve control chamber and, at its opposite end, selectively with said first and second command valve seatings;
a flexible command diaphragm juxtaposed with respect to said first and second command valve seatings;
and selectively actuatable biasing means for selectively biasing said command diaphragm into seating engagement with one or other of said command valve seatings so as selectively to effect communication between said third duct and that command valve seating not in sealing engagement with said command diaphragm.

6 more elements

A command valve module for use in controlling opening and closing of a flow valve and comprising a command valve housing, first and second enclosures of said housing separated by a central partition wall of the housing;

first and second central tubular portions located respectively in such enclosures and respectively spaced from walls of said enclosures;
a command valve well structure formed in said housing;
first and second spaced apart nozzles formed in said well structure and respectively communicating, via ducts formed in said housing with first and second coupling ports of said housing;
an aperture formed in said well structure and coupled via a duct formed in said housing with a third coupling port;
outlet rims of said first and second nozzles constituting first and second command valve seatings;
and a command valve diaphragm sealingly supported in said well structure so as to overlie said command valve seatings.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/392,796Filed 9 Sep 1999
Priority: 21 Mar 1994
Published: 15 Nov 2001
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

F16K 31/402
With electrically-actuated member in the discharge of the motor: acting on a diaphragm
Y10T 137/7761
Pilot or servo controlled: electrically actuated valve
Y10T 137/7764
Fluid pressure type: choked or throttled pressure type
F16K
Valves

Family

Application08/215,282Continuation in part · filed 21 Mar 1994
Application08/567,073Continuation in part · filed 4 Dec 1995
Application09/392,796Continuation in part · filed 9 Sep 1999
US 6,394,412 B2Related patent
US 2001/0040227 A1This patent

From the US filing history. Foreign family members aren’t listed.

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