Impeller assembly
US5147030A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 1991 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Jul 25, 2011 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D2023/028
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An impeller assembly having a housing supporting a rotatable impeller. The housing has a bottom entrance opening and a top exit opening separated by a curved back wall. A liner of low friction and abrasion resistant plastic material located adjacent a portion of the inside of the back wall prevents material buildup on the back wall. The liner is removeably mounted on the housing so that it can be replaced without taking the housing apart. The impeller has a plurality of pivoted paddle assemblies. Each paddle assembly has a body carrying a generally U-shaped liner of low friction and abrasion resistant material to minimize the collection of material on the paddle assemblies. The housing includes a knife adjacent the entrance opening. The body of the impeller assembly has a transverse lip that moves in close relation relative to the knife to cut material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.