US 4,227,674 A · Liquid metering valve

Abstract

A liquid metering flush valve to be installed in connection with plumbing fixtures such as water closets, urinals, service sinks, and other equipment and to supply said fixtures with a predetermined amount of water; which may be potable water, contaminated water, sea water, corrosive and/or unfiltered water, and water and/or oil combinations; at controlled pressures, flow rates and volumes. The basic valve design is on the hydraulic principal of proportional flow through orifices, regardless of pressure fluctuation but employs the use of four chambers, two of which are sealed and contain not only an orifice therebetween but a filtered, non-corrosive captive liquid to assure the orifice of protection from corrosive action and dirt which may damage the orifice or clog it and prevent it from working properly. One basic body design for either exposed or concealed valve installation simplify stocking and production requirements and costs and promote water economy through an adjustable feature which permits use of a minimum amount of water volume. The flexibility of selection of a Diaphragm model, Bellows model, or a Piston model best utilizes modern materials for maximum service when handling liquids other than clean, grit free, non-corrosive, potable water.

Claims17

Dependent claims

A liquid metering flush valve for controlling and supplying liquid to a plumbing fixture comprising:

control means for regulating supply liquid flow through the valve from an inlet to an outlet, the control means including two movable sealed valve chambers containing captive fluid separate from supply liquid passing through said valve, the two sealed valve chambers being separated by a rigid plate which contains an orifice and check valve, said two chambers having the captive fluid therein to pass through the orifice and check valve to regulate the actuation of the valve, the control means including third and fourth chambers communicating with the inlet and positioned on opposite sides of said two sealed chambers, valve operator means and valve actuating means responsive to operator means actuation for effecting operation of said control means to control the flow of the supply liquid from the third chamber to the outlet whereby fluid in the fourth chamber pushes the two movable chambers toward the third chamber, means for mounting the valve operator means remote from the control means, first and second lengths of tubing and means to connect the first and second lengths respectively to the third chamber and to the outlet, and means on the two movable valve chambers for preventing flow from the third chamber to the outlet upon movement of the two sealed chambers in a maximum direction toward the third chamber, the last mentioned means including non-hold open means for continuing to prevent flow from the third chamber as the two sealed chambers move toward the fourth chamber.

Dependencies are inferred from the claim text.

Liquid metering valve

Life of this patent

Liquid metering valve

Life of this patent

Abstract

Claims17