Secondary pump feed apparatus
US4147478A · kind A · utility
10Cited by
9References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 22, 1977 |
| Grant date | Apr 3, 1979 |
| Priority date | — |
| Expiry date | Sep 22, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B43/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Apparatus for connecting to a pump inlet where a first inlet feedpipe is attached including a second inlet feedpipe tap having a one-way check valve, and a resilient orifice member in the first inlet feedpipe upstream of the tap, whereby the orifice size is less than the inlet feedpipe size so as to provide a flow restriction for periodically creating negative pressure in the region of the tap, to draw liquid from the second inlet feedpipe into the first inlet feedpipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.