Förfarande och anordning för att förhindra eller lösgöra blockering förorsakade av via ett inmatningsstup till en hugg matade trädstammar

摘要

PCT No. PCT/SE98/00676 Sec. 371 Date Oct. 14, 1999 Sec. 102(e) Date Oct. 14, 1999 PCT Filed Apr. 14, 1998 PCT Pub. No. WO98/46404 PCT Pub. Date Oct. 22, 1998Method and apparatus for preventing or releasing a blockage occurring in a flow of tree trunks supplied to a wood chipper via a feed hopper and for securing an uninterrupted flow of timber to the chipper. At least one lifting arm is insertable to project through an opening defined in a hopper. The lifting arm is inserted to raise tree trunks wedged in the hopper and release blockages. The duration of the lifting arm insertion is controlled momentarily for limiting the amount of tree trunks supplied to the chipper.