Rotary cutter head with jet flushing blades
AssigneeHollandsche Aanneming Maatschappij B.V.
InventorJohan H. Volbeda
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Abstract
A cutter having a plurality of cutting blades for a suction-dredger which in operation is driven into rotation so that said cutting blades are capable to cut loose the soil which, mixed with water is subsequently sucked up by means of suction tube, one or more nozzles being provided on each cutting blade, at the back of its cutting edge so that the fluid jet ejected from the nozzles of a cutting blade pretreats the soil portion to be cut loose by the next cutting blade.
Claims2
A generally circular cutter head for a suction dredger having a plurality of helically and radially oriented cutting blades mounted thereon, said head being rotatably driven in operation such that said blades cut loose soil which , when mixed with water, is withdrawn by suction tube means, characterized by:
- (a) at least one fluid ejecting nozzle disposed on each blade to the rear of a leading, cutting edge thereof relative to the direction of rotation of said cutter head, each nozzle being directed generally radially outwardly relative to a central hub of said cutter head such that a fluid jet emanating therefrom pretreats the soil portion to be cut loose by the next cutting blade, and
- (b) means for communicating a pressurized supply of fluid to said nozzles.
Dependencies are inferred from the claim text.