Apparatus and method of throttling centrifugal pump liquid output
US4502834A · kind A · utility
Inventor
Key dates
| Filing date | Mar 29, 1982 |
| Grant date | Mar 5, 1985 |
| Priority date | — |
| Expiry date | Mar 29, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B49/225
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A first control assembly is provided operative to supply gas from a supply of gas under pressure to the inlet of a centrifugal liquid pump at increasing and decreasing rates responsive to decreases and increases in the pressure of liquid discharge from the pump. The first control assembly includes spring structure for closing an associated air flow controlling valve member which is yieldingly biased toward the open position by the pressure of liquid discharged from the pump and a second control assembly is provided operative to increase and decrease the loading of the aforementioned spring structure responsive to increases and decreases in demand for liquid being discharged from the pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.