Method and apparatus for simultaneous noise damping on intake and pressure sides of fluid pumps
US4256438A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 1979 |
| Grant date | Mar 17, 1981 |
| Priority date | — |
| Expiry date | May 4, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M37/0047
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus are proposed for the simultaneous damping of noise on the intake and pressure sides of fluid pumps, particularly fuel supply pumps. The method comprises the diverting of peaks of variation in the supply medium from the intake and pressure sides and then bringing them together, in a common region, into operative contact under the control of a diaphragm. The peaks of variation are furthermore adjusted in such a manner, by means of the length of the connection lines surrounding them, for example, that a phase displacement of 180.degree. is produced in the variations for the purpose of mutual compensation of the pressure variations on both sides which cause the generation of noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.