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US 3,978,462 AGranted
Drainage flow detector
OwnerClark Goodmaninventor
Life of this patent
Estimating the term…
Abstract
A drainage flow detector for predicting the clogging of drain lines in which the difference in the time required for air to be exhaled from the drain vent upon discharge of a quantity of waste and the time to inhale that amount of air as the waste drains is determined and compared with predetermined values to give an indication of proper drain operation.
Claims9
An improved drainage flow detector for predicting drainage blockages in a drain stack having an associated vent comprising:
- a. means to measure the exhalation and inhalation of air from the vent stack in the drainage system and to provide outputs indicative thereof;
- b. means having said outputs as inputs to compare the length of time of an associated exhalation and inhalation in response to a quantity of liquid being dumped into a drain stack associated with said drain vent;
- and
- c. means to provide an output indicative of said comparison.
1 more element
Dependencies are inferred from the claim text.