Rotary pump construction with cleaning feature
US4073605A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1976 |
| Grant date | Feb 14, 1978 |
| Priority date | — |
| Expiry date | Sep 15, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C13/005
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A positive fluid pump is provided which is capable of being cleaned in place by a circulating cleaning solution without the various pump components being disassembled. The impellers for the pump are rotatably mounted within a chamber formed in a housing. The inlet and the outlet for the chamber are separated from one another by the engaging impellers during normal operation of the pump. One of the side walls forming the pump chamber is provided with a cavity in which is slidably and sealingly mounted a wall piece. Under normal operation of the pump, the wall piece assumes a first position wherein one surface thereof is disposed adjacent the corresponding end faces of the impellers. When, the pump is being cleaned in place, the wall piece assumes a second position independently of the impellers wherein the one surface thereof is recessed from the pump chamber and the inlet and the outlet are interconnected permitting the cleaning solution to circulate through the chamber and around the impellers. The wall piece is retained in the first position by a predetermined pneumatic pressure exerted on a second surface of said wall piece disposed opposite said one surface. The predetermined p…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.