Fluid handling – Line condition change responsive valves – Bi-directional flow valves
Reexamination Certificate
2007-11-27
2007-11-27
Cygan, Michael (Department: 2855)
Fluid handling
Line condition change responsive valves
Bi-directional flow valves
C137S460000, C137S493000, C073S861740
Reexamination Certificate
active
11451754
ABSTRACT:
Embodiments disclosed herein relate in part to water flow sensors, and also to such water flow sensors in combination with a system used to selectively shut off the flow of water through a water supply pipe to a building, such as in the event of a broken water pipe. Such systems included in the combination can also optionally discontinue electrical power to a water heater to minimize the risk of water heater elements burning out in the event a water heater is at the risk of being drained of water, such as due to a broken water pipe.
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Fenton John A.
Hulick Donald E.
Cygan Michael
Dunlap Jonathan
Fenton John A.
Klarquist & Sparkman, LLP
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