Fluid handling – Systems – Programmer or timer
Patent
1989-10-17
1991-03-19
Cohan, Alan
Fluid handling
Systems
Programmer or timer
1374875, 137495, F16K 3102
Patent
active
050002244
ABSTRACT:
A hydraulically actuated shut-off valve is controlled by a solenoid actuated control valve. A flow detection unit having a substantially vertical inlet and a substantially vertical flow passage has a substantially horizontal outlet connected to the horizontal inlet of the shut-off valve. A member movable by water flowing through the flow passage actuates a switch forming a part of the flow detection unit. A control box preferably mounted on the flow detection unit has a timer and a reset switch therein which are capable of sending electrical control signals to the solenoid actuator of the control valve. The timer senses the condition of the flow detection switch and upon sensing that the switch has been closed a predetermined period of time suggesting abnormal water flow, possibly due to a leak in the system, sends a signal to the solenoid to actuate the control valve to cause the shut-off valve to close, preventing further water flow. The reset switch sends a reverse signal to the solenoid to cause the shut-off valve to open.
REFERENCES:
patent: 4105186 (1978-08-01), Eby
patent: 4235414 (1980-11-01), Lis
patent: 4249565 (1981-02-01), Brust
patent: 4518955 (1985-05-01), Meyer
patent: 4522229 (1985-06-01), Van de Moortele
patent: 4589435 (1986-05-01), Aldrich
patent: 4883025 (1989-11-01), Richeson
Johnson Gregory R.
Lovett Forrest E.
Olson, Jr. William C.
Cohan Alan
Water Conservation, Inc.
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