Wood chipping apparatus

Claim 2

A chipper apparatus for chipping material comprising: An elongated rectangular chipper block having front and rear surfaces and substantially flat edges extending along said block, said block including at least one knife receiving chip slot extending through said block between said front and rear surfaces; a cutter kniFe positioned within said aperture and including a cutting edge extending from the front surface of said block; a pair of fan blades oppositely and fixedly positioned on said edges extending outwardly from the rear surface of said chipper block and extending longitudinally along a portion of the length of said block; a housing shaped to enclose said chipper block and including front and rear surfaces and a wall extending therebetween, said front surface having a material receiving aperture therein; said housing including a chipper exhaust chute extending from said wall and spaced from said receiving aperture; means for rotatably positioning said chipper block within said housing to position said chipper block such that as it rotates, said chipper knife periodically passes adjacent the receiving aperture; means for supporting material fed into said aperture; and drive means for rotatably driving said chipper block whereby material fed into said aperture is reduced to chips which are exhausted from said discharge chute.

Claim 3

The apparatus as defined in claim 1 wherein said block includes a pair of elongated knife receiving chip slots formed in opposite ends of said block.

Claim 4

The apparatus as defined in claim 1 wherein said housing includes a generally circular interior side wall and wherein said exhaust chute extends tangentially from said wall.

Claim 5

The apparatus as defined in claim 1 and further including a frame adapted to hold said housing, and mounting means positioning said housing at an acute angle on said frame such that as said chipper block rotates, it tends to draw material into said housing.

Claim 6

The apparatus as defined in claim 1 wherein said supporting means includes an anvil having hardened wear surfaces and mounted along one edge of said receiving aperture.

Claim 7

The apparatus as defined in claim 1 wherein said means for rotatably positioning said chipper block within said housing comprises a shaft supported within said housing by bearings and extending through a central aperture in said chipper block and fixedly attached to said block, said shaft having at least one end extending from said housing.

Claim 8

The apparatus as defined in claim 1 and further including a circular wear disc fixedly positioned on said front surface of said chipper block and including a knife slot therein for permitting said knife to extend outwardly from said disc.

Claim 9

A portable wood chipper apparatus of the type comprising a rotary chipper positioned within an enclosed housing having a material input aperture and a chip discharge chute, said chipper including one or more chip slots each with a knife positioned therein, the improvement comprising: an elongated rectangular chipper block having elongated relatively flat top and bottom edges; and a pair of flat fan blades oppositely and fixedly positioned on said surfaces at opposite ends of said chipper to exhaust wood chips from said housing as said chipper block is rotatably driven.

Claim 10

A portable wood chipper apparatus of the type comprising a rotary chipper positioned within an enclosed housing having a material input aperture and a chip discharge chute, said chipper including one or more chip slots each with a knife positioned therein, the improvement comprising: an elongated rectangular chipper block having elongated relatively flat top and bottom edges; and a pair of flat fan blades oppositely and fixedly positioned on said surfaces at opposite ends of said chipper to exhaust wood chips from said housing as said chipper block is rotatably driven.

Claim 11

The apparatus as defined in claim 8 and further including a wear disc positioned on one face of said chipper block to contact material fed into said chipper apparatus.

Claim 12

A rotary wood chipper comprising: a rectangular chipper block whose width is significantly greater than its height and having front and rear surfaces and flat top and bottom edges, said block including a pair of chip slots having configurated edges to promote the passage of chips therethrough and permit the mounting of chipping knives at one edge thereof; a pair of fan blades oppositely and fixedly positioned on said top and bottom edges of said block and extending along a portion of the length of said block and outwardly from the rear surface of said block; a wear plate having slots therein positioned on said front surface of said block such that said slots are aligned with said chip slots of said block; a pair of elongated chipper knives having a cutting edge; means for mounting said chipper knives to one edge of saId chip slots of said block such that said cutting edges extend outwardly at an acute angle from said wear plate; a housing enclosing said chipper block and including front and rear surfaces adjacent said front and rear surfaces of said chipper block, respectively, and a wall extending between said surfaces, said front surface including a material input aperture positioned to align with the path of travel of said chipper knives, said housing further including a discharge chute extending tangentially from said wall to provide a discharge path for wood chips; and means for rotatably mounting said chipper block in said housing.

Claim 13

A rotary wood chipper comprising: a rectangular chipper block whose width is significantly greater than its height and having front and rear surfaces and flat top and bottom edges, said block including a pair of chip slots having configurated edges to promote the passage of chips therethrough and permit the mounting of chipping knives at one edge thereof; a pair of fan blades oppositely and fixedly positioned on said top and bottom edges of said block and extending along a portion of the length of said block and outwardly from the rear surface of said block; a wear plate having slots therein positioned on said front surface of said block such that said slots are aligned with said chip slots of said block; a pair of elongated chipper knives having a cutting edge; means for mounting said chipper knives to one edge of saId chip slots of said block such that said cutting edges extend outwardly at an acute angle from said wear plate; a housing enclosing said chipper block and including front and rear surfaces adjacent said front and rear surfaces of said chipper block, respectively, and a wall extending between said surfaces, said front surface including a material input aperture positioned to align with the path of travel of said chipper knives, said housing further including a discharge chute extending tangentially from said wall to provide a discharge path for wood chips; and means for rotatably mounting said chipper block in said housing.

Claim 14

The apparatus as defined in claim 10 wherein said rear surface of said housing includes an air intake formed therein opposite said discharge chute.

Claim 15

The apparatus as defined in claim 10 and further including support means postioned along a lower edge of said material input aperture to support material fed into said chipper.

Claim 16

The apparatus as defined in claim 10 wherein said housing is positioned on a frame at an acute angle such that the cutting knives tend to draw material into the chipper during the operation of said chipper.

Claim 17

The apparatus as defined in claim 10 wherein said means for rotatably mounting said chipper block in said housing comprises an axle coupled to said block and supported by bearings on opposite sides of said block and mounted to said housing, said axle extending from said housing and coupled to drive means for rotating said chipper block.