US 6,871,835 B2Granted

Flow control valve with automatic shutoff capability

AssigneeArichell Technologies, Inc.

InventorNatan F. Parsons

Life of this patent

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Abstract

A valve includes a housing having a fluid inlet and a fluid outlet and defining a fluid flow path between the inlet and the outlet. A check valve positioned in the housing has a valve seat in the flow path from the inlet, a valve member movable between a seated position against the valve seat blocking fluid flow from the inlet past the valve seat and an unseated position spaced away from the valve seat, and a spring for biasing the valve member toward the seated position. A main valve assembly is removably positioned at a home position in the housing in the flow path to control the fluid flow from the check valve to the outlet. The valve assembly has a portion which engages the valve member and maintains the valve member in it's unseated position so long as the main valve assembly is at the home position, the valve member being moved to the unseated position by the spring upon removal of the main valve assembly from the housing.

Claims14

Dependent claims

A flush control valve comprising

a housing;
a first fluid conduit extending into the housing;
a tube mounted in the housing in axial alignment with the first fluid conduit, said tube having an interior flange defining a valve seat;
a second fluid conduit extending into the housing, said second fluid conduit being in fluid communication with the interior of said tube adjacent to the valve seat;
a valve member movable within the tube between an open position wherein the valve member allows fluid to flow from the first conduit along the tube past the valve seat and a closed position wherein the valve member seats against the valve seat stopping the flow of fluid along the tube past the valve seat;
biasing means for biasing the valve member toward the closed position;
a valve assembly for seating at a home position in the housing, said valve assembly including
a tubular member slidably received in said tube, said tubular member having a first end engaging the valve member and a second end defining a second valve seat, said tubular member maintaining the valve member in said open position so long, as the valve assembly is at said seated position thereby establishing a fluid flow path between the second conduit and the tubular member to the second valve seat, and
valve means for controlling the fluid flow from the tubular member past the second valve seat;
means in the housing defining a fluid flow path between the second valve seat and the first fluid conduit, and
a retainer for releasably retaining the valve assembly in said seated position whereby when said retainer is loosened thereby releasing the valve assembly, the valve member will be moved automatically by the biasing means to said closed position.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/177,327Filed 20 Jun 2002
Published: US 2003/0234375 A125 Dec 2003
Granted: 29 Mar 2005
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

F16K 43/005
Auxiliary closure means in valves, which in case of repair, e.g. rewashering, of the valve, can take over the function of the normal closure…: an…
E03D 3/02
Flushing devices operated by pressure of the water supply system flushing valves not connected to the water-supply main, also if air is blown in…:…
F16K
Valves
E03D
Water-closets or urinals with flushing devices