Fluid handling – Systems – Multiple inlet with single outlet
Patent
1993-05-14
1994-02-22
Hepperle, Stephen M.
Fluid handling
Systems
Multiple inlet with single outlet
13763022, 239415, 239528, F16K 1116
Patent
active
052878872
ABSTRACT:
A handle operated flow control valve has a body that defines first and second spaced inlet passages that extend from spaced first and second inlets and join in the vicinity of a first flow control valve for ducting pressurized flows of fluid from one or both of the inlets into an outlet passage for discharge through a nozzle. The first flow control valve has a first valve stem that moves in response to operation of a trigger handle. When the trigger handle is operated relatively gently within an initial range of movement, only the valve stem of the first flow control valve is moved out of its closed position, whereby a controlled flow of a first fluid such as pressurized water is ducted from the first inlet passage into the outlet passage for discharge. When the trigger handle is more forcefully operated so as to pass through the range of movement that is needed to establish a maximum normal rate of flow of the first fluid through the outlet passage, applying added force to the trigger handle causes the first valve stem to engage and move a second valve stem of a second valve to admit a flow of a second fluid such as pressurized air into the second inlet passage for combination with the flow of the first fluid and for discharge through the outlet passage and through the discharge nozzle. In preferred practice, a check valve is provided to prevent a pressurized flow of the first fluid from backflowing through the second valve.
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Burge David A.
Hepperle Stephen M.
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