Bilge pump arrangement having back flow preventer
US10302090B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2014 |
| Grant date | May 28, 2019 |
| Priority date | — |
| Expiry date | Dec 21, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K15/147
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.