Cutter head with cutting members that rotate relative to each other
OwnerChia-Hsiung Huang, Jyun-Hua Chianginventors
Life of this patent
Estimating the term…
Abstract
A cutter head comprising a plurality of coaxially disposed transmission shafts including a central transmission shaft and at least two tubular transmission shafts with each shaft having a cutting member, the shafts being driven independently with one another and any two radially adjacent shafts being driven to rotate in opposite directions, wherein diameters of the shafts are determined in such a manner that a sum of cutting areas covered by the cutting members of the shafts rotating in one direction is substantially equal to a sum of the cutting areas covered by cutting members of the shafts rotating in the opposite direction.
Claims4
A cutter head comprising:
- a fixed casing defining an axis of rotation;
- a plurality of transmission shafts including a central transmission shaft and at least two tubular transmission shafts, each shaft having a first end fixedly connected with a cutting member and a second end;
- means for rotatably mounting said plurality of transmission shafts at the second ends thereof to said casing and to one another coaxially about said axis of rotation with one shaft being disposed over an outer periphery of another shaft;
- means for driving said plurality of transmission shafts in such a manner that the shafts are driven independently with one another and any two radially adjacent shafts are driven to rotate in a first direction and a second direction which is opposite to said first direction with respect to said axis of rotation, respectively;
- and such that the central transmission shaft includes a screw rod portion, the cutting member of the central transmission shaft is a tubular member having a closed end connected to the transmission shaft and an open end, and wherein a number of openings and at least one helical cutting blade are provided on a peripheral wall of the tubular cutting members of the at least two tubular transmission shafts, cutters being provided on an end face of the open end of the tubular member and on said at least one helical cutting blade.
Dependencies are inferred from the claim text.