Medium consistency pump with self-feeding
US4826398A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1987 |
| Grant date | May 2, 1989 |
| Priority date | — |
| Expiry date | Jul 6, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04D29/448
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A suspension, such as paper pulp, having a consistency of between about 6-20% (i.e. medium consistency) is pumped without the necessity of using a vacuum system to effect gas removal. A hollow shaft having elongated slots in it, has impeller blades disposed on its exterior surface. Connected to the suspension inlet end of the shaft is a hollow boat-type propeller which positively feeds suspension directly to the impeller blades. The propeller is disposed in a vessel having an enlarged cross-section with respect to the pump housing, and anti-rotation bars are placed around the propeller in the vessel to prevent rotation of its suspension, so that it is fed by the propeller. The propeller pressurizes any gas separated from the suspension so that it can be removed from the suspension by the pump without a vacuum system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.