Primary and counter knife assembly for use in wood chipper
US8051887B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 2009 |
| Grant date | Nov 8, 2011 |
| Priority date | — |
| Expiry date | Jul 8, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27L11/005
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A wood chipper having a rotatable disc that contains a series of slots that pass through the disc. A primary chipper knife is located at the entrance of each slot which separates slices from a work piece and directs the slices through the slot. A counter knife unit is mounted within each slot for engaging the slices leaving the primary chipper knife to reduce the size of the chips as they move through the slot. The counter knife unit contains a first series of spaced apart chip contact elements that have a first height to contact the slices as they leave the primary chipper knife to reduce the size of the slices. The counter knife further contains a second series of chip contact elements that have a second height that is less than that of the chip contact element in the first series. Each contact element in the second series is arranged to contact chips leaving the contact elements in the first series to further reducing the size of the chips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.