Piston and piston rod construction for pumps and method of flushing piston-type pumps
US4023469A · kind A · utility
19Cited by
7References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 9, 1972 |
| Grant date | May 17, 1977 |
| Priority date | — |
| Expiry date | Aug 9, 1992 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B53/143
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A piston and piston rod construction for use in a double-acting reciprocating pump, and a method of flushing a piston-type pump. The piston has spaced apart rubbers mounted on a body intermediate its length. The rubbers have confronting lips. Each rubber alternately is the working rubber and the idle rubber as the pump operates. Fluid under a pressure greater than the pump discharge pressure is introduced to the space between rubbers, where it is effective to flush particles from the surface of the liner in front of the working rubber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.