Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Wear shield or replaceable wear sleeve
Reexamination Certificate
2007-09-18
2007-09-18
Kreck, John (Department: 3673)
Mining or in situ disintegration of hard material
Cutter tooth or tooth head
Wear shield or replaceable wear sleeve
C299S107000
Reexamination Certificate
active
11525089
ABSTRACT:
A hollow sleeve is mounted in a hole of a holder block to receive a rotary cutter bit. The sleeve includes a front flange and a shank extending rearwardly from the front flange and defining a longitudinal axis. The shank includes an outer periphery having a radially stepped configuration, wherein an outer surface of the shank includes a plurality of axially adjacent surface sections that become successively smaller in cross-section in a direction away from the flange. Each surface section occupies one-third of the hole length. Each surface section has longitudinally spaced front and rear ends, wherein a portion of each surface section situated between its front and rear ends is spaced farther from the axis than are the front and rear ends. Each surface section has a generally longitudinally extending groove formed therein.
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Kreck John
Sandvik Intellectual Property AB
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