Pressure attenuated pump piston
US7938059B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 2008 |
| Grant date | May 10, 2011 |
| Priority date | — |
| Expiry date | Jul 19, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B11/0091
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump piston assembly for use with a high-pressure pump includes a first section extending axially from a first end, a second section positioned adjacent to the first section and extending axially towards a second end, and an attenuation feature disposed within the piston bore such that the attenuation feature is part of the second end. By integrating the attenuation feature directly into the pump piston, pressure spikes, such as pressure peaks and valleys of an oscillatory pressure wave originating from the reciprocating motion of the piston, may be compensated directly in a supply pressure chamber. By providing a variety of attenuation features, such as a ball/spring assembly, an elastomer insert, an elastomer insert/internal piston assembly, and an elastomer insert/spring/ball assembly, attenuation for applications with a variety of frequencies and pressures can be utilized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.