Fluid handling – Systems – Programmer or timer
Patent
1993-08-20
1995-08-15
Michalsky, Gerald A.
Fluid handling
Systems
Programmer or timer
13762413, F16K 2106
Patent
active
054410789
ABSTRACT:
A device for terminating flow of a liquid (e.g., water) after flow of a predetermined duration. The device is able to reset itself if flow is for a period less that the predetermined duration, as well as when the flow exceeds the predetermined duration. The device generally includes a housing, an inlet and an outlet, bypass ports, a turn off valve, a valve seat, a water wheel, reduction gears and a valve ratchet and spring. In operation, the fluid enters the housing through the inlet and strikes the water wheel which is connected to the valve ratchet through the reduction gears. The rotational movement of the water wheel is translated into linear movement of the valve ratchet. If the water runs for longer than the predetermined duration, the valve ratchet causes the turn off valve to be seated in the valve seat and the flow is terminated. If the water is turned off prior to the predetermined duration, the spring returns the turn off valve to the open position for subsequent water use. After the turn off valve is seated, the bypass ports allow the turn off valve to be reopened when pressure is equal on both sides of the turn off valve, as when the faucet is turned off or the leak is repaired.
REFERENCES:
patent: 4086933 (1978-05-01), Pansini
patent: 5050772 (1991-09-01), Brane et al.
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