B - Operations – Transporting – 02 – C
Patent
B - Operations, Transporting
02
C
241/122
B02C 18/18 (2006.01)
Patent
CA 1104107
2164-24a ABSTRACT Apparatus for comminuting bulky pieces of waste material or the like has two parallel shafts which are driven at the same speed but in opposite directions and carry several sets of cooperating knives. The knives of each set have closely adjacent and faces which are bounded by sharp cutting edges surrounding relatively narrow raised marginal zones. A portion of the marginal zone of one knife of each set always overlies a portion of the marginal zone of the other knife. When the marginal zones undergo pronounced wear, the knives of the respective set are shifted axially of the respective shafts to move the marginal zones nearer to each other. The neighboring knives on the same shaft are angularly offset with respect to each other and are coupled to each other by pins which extend into sockets provided in the end faces of the knives. The knives are formed with peripheral lobes which alternate with recesses whereby a recess of one knife of each set of knives is adjacent to a lobe of the other knife of the same set, or vice versa, in each angular position of the knives. The raised marginal zones are obtained by machining shallow endless grooves into the end faces of the knives. The outer boundaries of the grooves are immediately adjacent to the respective raised marginal zones, and the inner boundaries of the grooves are spaced apart from the central bores of the respective knives and surround the sockets in the end faces of the corresponding knives. - 1 -
302756
Bohmter Maschinenfabrik G.m.b.h. & Co. Kg
Fetherstonhaugh & Co.
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