Solid material comminution or disintegration – Apparatus – Comminuting elements
Patent
1989-05-10
1990-06-05
Rosenbaum, Mark
Solid material comminution or disintegration
Apparatus
Comminuting elements
B02C 1818
Patent
active
049307100
ABSTRACT:
To provide for self-holding of cutter elements in grooves of a rotary cutter body (1; 100, 30, 33), which self holding is enhanced by centrifugal forces acting on the cutter elements, the grooves (2) in the body define first and second lateral support surfaces (13, 5), the cutter elements (6, 6a, 6b, 6c) define first and second engagement surfaces (12, 11) and a clamping element (7, 7') is provided defining an engagement surface facing the cutter element, the surfaces being so arranged that at least part of the first support surfaces (13) and at least part of the first engagement surface (12) of the cutter element form, in cross section, a wedge-shaped space which decreases in width towards the circumference of the cylindrical body, and each clamping element, in cross section, likewise is wedge-shaped and dimensioned and shaped to fit the wedge-shaped space. Preferably, the lateral support surfaces (5) define an acute angle with respect to each other. Clamping structures, for example formed by resilient insert (16, 17, 18-20, 22) are provided in the bottom of the groove to urge the clamping elements outwardly; alternatively, the clamping elements can be backed outwardly within the groove by screws passed therethrough and engaging the root (15) of the groove. To remove the cutter elements, it is only necessary to depress the clamping elements (7, 7') which, then, will release the wedging effect against the cutter elements, to permit their removal.
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