US 2010/0133452 A1 · FLUID LEVEL CONTROL VALVE

Abstract

A valve device to control fluid supplied to a tank. The valve device includes a fluid inlet, a fluid outlet to expel fluid to the tank, a valve seat, defining an opening through which fluid is adapted to flow from the inlet to the outlet, a valve member, movable relative to the valve seat between an open position and a closed position, and, a control mechanism to operate said valve device. The control mechanism includes a control chamber, a fluid passageway between the control chamber and the inlet, a flow control element within the fluid passageway, a relief valve, movable between an open position and a closed position to selectively expel fluid from the control chamber to a relief port, and, a relief valve activation mechanism, to control the operation of the relief valve according to an amount of fluid in the tank.

Claims18

Dependent claims

A valve device to control fluid supplied to a tank, said valve device including:

a fluid inlet;
a fluid outlet to expel fluid to said tank;
a valve seat, defining an opening through which fluid is adapted to flow from said inlet to said outlet;
a valve member, movable relative to said valve seat between an open and a closed position;
and,
a control means to operate said valve device, said control means including:
a control chamber;
a fluid passageway between said control chamber and said inlet;
a flow control element within said fluid passageway;
a relief valve, movable between an open and closed position to selectively expel fluid from said control chamber to a relief port;
and,
a relief valve activation means, to control the operation of said relief valve according to the amount of fluid in said tank.

9 more elements

Dependencies are inferred from the claim text.

Fluid level control valve

Life of this patent

Fluid level control valve

Life of this patent

Abstract

Claims18