Abstract: Apparatus for piece-chopping wood includes rotary blade apparatus accommodated within a housing including a helical, screw-like blade member having a conical outer configuration which increases in diameter in the direction in which the wood is fed, the outer edge of the helical blade member being shaped to function as a cutting blade whereby wood fed through a feed hopper into the housing is chopped into relatively large size pieces which are then discharged through a tube communicating with the housing. The housing has an interior fluted guiding surface which is associated with the blade member whereby the wood fed thereto is drawn inwardly towards the blade. At least one counter-blade may be fixed to the interior surface of the housing in the region of the outer edge of the blade member.

Abstract: The invention concerns an apparatus for feeding solid fuel from a storage silo or equivalent to a solid fuel-using heating boiler. The feeding apparatus comprises a piston, which has been disposed to carry out a reciprocating motion within a tube which through an aperture communicates with the solid fuel storage silo or equivalent, and which communicates by its other end with the heating boiler. With a view to accomplishing the feeding of the solid fuel with reliable certainty, before the piston, in the feeding apparatus of the invention there has been provided in the lower part of the storage silo or equivalent, a rotatably disposed vane.