Stump grinding bit

A - Human Necessities – 01 – G

Patent

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Details

A01G 23/06 (2006.01) B23C 5/20 (2006.01)

Patent

CA 2416041

A stump cotter includes a rotary drum, holders mounted on the drum, and cutting bits mounted in respective bores of each holder for rotation relative thereto. Each cutting bit includes a shank having a pocket formed in a front end thereof in which the cutting tip is brazed, wherein an outer lip of the shank tightly grips an outer side surface of the cutting tip with a thermal shrink fit. The cutting tip includes a circular cutting edge formed by the intersection between portions of the front surface and side surface of the cutting tip, which surface portions intersect at a ninety degree angle. The front surface of the cutting tip includes raised radial ribs spaced circumferentially therearound for inducing rotation of the cutting bit during a cutting operation.

L'invention concerne une déracineuse qui comprend un four à tambour rotatif, des douilles montées sur le four à tambour et des taillants fixés aux alésages respectifs de chaque douille pour une rotation relative. Chaque taillant comprend une tige ayant une poche formée à l'extrémité antérieure, où le taillant est brasé. Une lèvre externe de la tige assure la préhension d'une surface latérale externe du taillant avec un emmanchement thermique à chaud. Le taillant comprend une arête coupante circulaire formée par l'intersection entre les portions de la surface antérieure et la surface latérale du taillant, l'intersection des portions de surface formant un angle de 90 degrés. La surface antérieure du taillant comprend des nervures radiales surélevées espacées de façon circonférentielle pour induire une rotation du taillant durant une opération de coupe.

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