Pumps – Condition responsive control of pump drive motor – Responsive to accumulation of pumped liquid in receiver
Patent
1990-04-19
1992-10-06
Bertsch, Richard A.
Pumps
Condition responsive control of pump drive motor
Responsive to accumulation of pumped liquid in receiver
417 12, 200 83T, F04D 2700
Patent
active
051526700
ABSTRACT:
A sump apparatus for use in a marine vessel comprises a tank, a pump communicating with the tank for evacuating the tank, and a pump control mechanism for energizing the pump in response to a predetermined height of water in the tank. That mechanism comprises a housing defining an air chamber, a switch disposed in the chamber and operably connected to the pump, a switch actuating diaphragm mounted in the housing for actuating the switch. An air vent conduit communicates with the chamber, and a flow restrictor desensitizes the diaphragm relative to momentary changes in the water pressure acting on the diaphragm. The pump control mechanism can be mounted in a side wall of the tank, or to a removable top lid of the tank so as to be removable with that lid. The pump control mechanism may include a timer operably connected to the switch and pump for deactivating the pump after a predetermined period of pump operation sufficient to evacuate the tank.
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Bertsch Richard A.
Scheuermann David W.
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