Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Plural heads moving relative to each other
Reexamination Certificate
2011-03-01
2011-03-01
Lagman, Frederick L (Department: 3672)
Mining or in situ disintegration of hard material
Cutter tooth or tooth head
Plural heads moving relative to each other
C299S071000, C299S075000
Reexamination Certificate
active
07896445
ABSTRACT:
An apparatus for the milling and/or drilling cutting of materials, in particular for the removal of rock, minerals or coal, with a tool drum which is mounted on a drum carrier rotatably about a drum axis, in which a plurality of tool shafts, which carry cutting tools at their ends projecting from the tool drum, are rotatable drivable mounted, at least two of the tool shafts being drivable by a common gear drive which has power take-off gearwheels arranged fixedly in terms of rotation on the tool shafts, and a common drive element which cooperates with the power take-off gearwheels. The drive element and the tool drum being rotatable in relation to one another and the shaft axes of the tool shafts standing transversely to the drum axis.
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International Search Report for PCT/EP2007/007600.
English translation of the International Preliminary Report on Patentability and Written Opinion dated Mar. 17, 2009 of International Appln. No. PCT/EP2007/007600, filed Aug. 30, 2007.
Bucyrus Europe GmbH
Lagman Frederick L
Rankin , Hill & Clark LLP
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