Fluid handling – Liquid level responsive or maintaining systems – By float controlled valve
Patent
1978-03-13
1980-10-28
Schwadron, Martin P.
Fluid handling
Liquid level responsive or maintaining systems
By float controlled valve
137445, F16K 3118, F16K 3300
Patent
active
042301459
ABSTRACT:
Disclosed herein is a pressure activated fluid control system particularly adapted for use as a flushing mechanism for toilets of the water tank type. This system includes a push button actuated control valve assembly which, in the shutoff position, urges a needle valve against a movable valve seat; a pressure actuated direction flow valve; and a tank ball lifting mechanism. The direction flow valve is in fluid communication with the control valve assembly which upon actuation of the control valve, allows incoming water under line pressure to pass to the lifting mechanism, raise a lift piston and lift the tank ball from the cistern drain. The tank ball depends from a piston disposed within a water filled lower cylinder and following the draining of the cistern, the tank ball slowly and precisely returns to the cistern drain as the water below the piston head within the lower cylinder passes from the cylinder through a check valve disposed about the piston rod. A float is connected to the needle valve to close the valve upon refilling of the cistern and prevent further fluid flow to the lifting mechanism.
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Schwadron Martin P.
Walton G. L.
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