Utilities shutoff system
First Claim
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1. An automatic shutoff system for a water or gas supply line comprising:
- a) valve means for opening and closing said water or gas supply line;
b) control means for controlling said valve means;
c) means for sensing a pressure change in said water or gas supply line caused by flow in said water or gas supply line;
d) means for said sensing means to send a signal to said control means;
e) system arming means to selectively cause said control means to close said valve in response to a signal indicating a flow in said water or gas supply line;
f) first trigger time delay means for activating said control means to close said valve after a predetermined duration of flow in said water or gas supply line;
g) second trigger time delay means for overriding said first trigger time delay with second trigger time delay for a predetermined period of time; and
h) means for setting a variable time period for which said second trigger time delay overrides said first trigger time delay.
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Abstract
The present invention provides an automatic monitoring and shutoff system for utilities which allows the user to set the system to permit certain uses of gas or water without triggering the shutoff, depending on whether the user is home or away, and is able to provide for specific usual or unusual uses.
123 Citations
12 Claims
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1. An automatic shutoff system for a water or gas supply line comprising:
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a) valve means for opening and closing said water or gas supply line; b) control means for controlling said valve means; c) means for sensing a pressure change in said water or gas supply line caused by flow in said water or gas supply line; d) means for said sensing means to send a signal to said control means; e) system arming means to selectively cause said control means to close said valve in response to a signal indicating a flow in said water or gas supply line; f) first trigger time delay means for activating said control means to close said valve after a predetermined duration of flow in said water or gas supply line; g) second trigger time delay means for overriding said first trigger time delay with second trigger time delay for a predetermined period of time; and h) means for setting a variable time period for which said second trigger time delay overrides said first trigger time delay. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification