BILGE PUMP ARRANGEMENT HAVING BACK FLOW PREVENTER

摘要

Apparatus for providing liquid from a reservoir of liquid contained in a vehicle/vessel or other equipment, featuring a pump for pumping liquid having a pump housing outlet nozzle; and a back flow preventer assembly having an inlet end to couple to the outlet nozzle, having an outlet end to couple to an outlet hose for connecting to an outlet exiting a wall of a vehicle, vessel or other equipment, and having a duckbill-type check valve to provide liquid being pumped in one direction from the reservoir of the vehicle, vessel or other equipment to the outlet exiting the wall of the vehicle, vessel or other equipment via the outlet hose, and also configured to prevent residue liquid left in the outlet hose from flowing back into the pump and returning to the reservoir once the pump has completed pumping if the outlet exiting the wall of the vehicle, vessel or other equipment is above the outlet nozzle, so as to prevent on an on/off oscillation of the pump depending on the volume of residue liquid left in the outlet hose.

主权项

1. Apparatus for providing liquid from a reservoir of liquid contained in a vehicle, vessel or other equipment, comprising:
a pump configured to respond to a level of liquid contained in a reservoir in a vehicle, vessel or other equipment, and turn on/off for pumping the liquid based on the level of the liquid sensed, and also configured with a pump housing outlet nozzle for providing the liquid being pumped; and a back flow preventer assembly having an inlet configured to couple to the pump housing outlet nozzle, having an outlet configured to couple to an outlet hose for connecting to an outlet exiting a wall of the vehicle, vessel or other equipment, and having a duckbill-type check valve with at least one duckbill lip configured to open and provide the liquid being pumped by the pump in one direction from the reservoir of the vehicle, vessel or other equipment to the outlet exiting the wall of the vehicle, vessel or other equipment via the outlet hose, and also configured to close and prevent residue liquid left in the outlet hose from flowing back into the pump and returning to the reservoir once the pump has completed pumping and turns off if the outlet exiting the wall of the vehicle, vessel or other equipment is above the outlet nozzle, so as to prevent on an on/off oscillation of the pump depending on the volume of residue liquid left in the outlet hose.