Chipper feed mechanism and throat opening sensor for use...

Details Chipper feed mechanism and throat opening sensor for use... Chipper feed mechanism and throat opening sensor for use...

2011-01-25

2011-01-25

Sullivan, Debra M (Department: 3725)

Solid material comminution or disintegration

Processes

Wood and similar natural-fibrous vegetable material

C241S034000, C241S092000, C144S356000, C144S392000

Reexamination Certificate

active

07874504

ABSTRACT:
A wood chipper includes a cutting assembly and a feed wheel for feeding material through an adjustable throat opening adjacent the feed wheel and toward the cutting assembly. A throat sensor measures the size of the throat opening and an electronic control unit (ECU) controls operation of the wood chipper in accordance with the size of the throat opening. The ECU controls forward, reverse and non-rotation of the feed wheel as well as down pressure applied by the feed wheel on feed material moving through the throat opening. The feed wheel down pressure may be constant or vary in any number of ways. One option includes applying down pressure in a pulsating manner.

REFERENCES:
patent: 5072887 (1991-12-01), Thom, Jr.
patent: 5205496 (1993-04-01), O'Donnell et al.
patent: 6474579 (2002-11-01), Bardos et al.
patent: 6830204 (2004-12-01), Morey
patent: 2003/0111566 (2003-06-01), Seaman et al.
patent: 2007/0069051 (2007-03-01), Hartzler et al.

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