Primary and counter knife assembly for use in wood chipper

Details Primary and counter knife assembly for use in wood chipper Primary and counter knife assembly for use in wood chipper

2009-11-04

2011-11-08

Self, Shelley (Department: 3725)

Woodworking

Process

Mechanical cutting or shaping

C144S176000, C144S163000, C144S162100, C241S092000, C241S055000, C241S152200

Reexamination Certificate

active

08051887

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.

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