Liquid purification or separation – Flow – fluid pressure or material level – responsive – Diverse sensing means
Patent
1979-03-26
1981-05-19
Adee, John
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Diverse sensing means
210109, 210138, 1374875, C02C 100
Patent
active
042683831
ABSTRACT:
A vacuum operated sewage system includes a static pressure sensor establishing a trigger signal at a selected first level in a standpipe. The sensor is connected upstream of a discharge control valve and actuates a trigger and timer controller at the selected sensed pressure to establish flow for a predetermined period. A separate air admission control is provided to separately actuate the timer controller if the vacuum level in the sewage flow line drops below a selected level, to thereby reset the system vacuum pressure. The air admission control includes a level trigger valve operable to actuate the controller. A by-pass pressure sensing valve has an input connected to sense line pressure and holds the trigger valve in standby until the line pressure drops below a selected vacuum pressure. A resettable fluid timer is also connected to the level trigger valve and is charged under normal pressure system conditions. The timer holds the trigger valve in the set state for a selected period after the by-pass sensing valve responds to system level pressure decreasing below the selected minimum operating pressure and thereby prevents response to momentary changes in the flow line vacuum level.
REFERENCES:
patent: 3397784 (1968-08-01), Carr
patent: 3730884 (1973-05-01), Burns et al.
patent: 3777778 (1973-12-01), Jano
patent: 4155851 (1979-05-01), Michael
Adee John
Johnson Controls Inc.
LandOfFree
Flow system control with time delay override means does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Flow system control with time delay override means, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flow system control with time delay override means will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1488501