Liquid heaters and vaporizers – Safety devices
Reexamination Certificate
2011-08-09
2011-08-09
Wilson, Gregory A (Department: 3749)
Liquid heaters and vaporizers
Safety devices
C122S45100R, C122S504200, C137S392000, C137S624140
Reexamination Certificate
active
07992527
ABSTRACT:
A water feed controller which can provide for the addition of a preset fixed amount of water to be added after a low water condition is removed. This system provides for a preset fixed amount of water to be added to a boiler above the amount which triggers the low water condition. This generally inhibits excess cycling from the boiler operating at its minimum safe water level as well as inhibiting overfilling of the boiler. Further, there is discussed a water feed controller which can measure the amount of water added over a prior predetermined period (such as 30 days) which serves as a floating window of time so that a leak or other condition resulting in overly frequent filling can be detected quickly.
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Wilson Gregory A
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