Mining or in situ disintegration of hard material – Miscellaneous
Patent
1989-01-17
1991-04-16
Novosad, Stephen J.
Mining or in situ disintegration of hard material
Miscellaneous
37142R, 299 93, E21C 3518
Patent
active
050076850
ABSTRACT:
A trenching tool assembly with dual indexing capabilities includes a block formed with a tool shank bore and a cutter bit having a shank which is insertable into the tool shank bore. The shank includes a polygonal portion which is preferably a hex. An indexing washer is formed with a central opening shaped to engage the polygonal section of the cutter bit shank and to prevent relative rotation therebetween. The indexing washer engages the tool block in any one of a number of fixed positions. To change the angle of attack of the cutter bit, the indexing washer is disengaged from the tool block and cutter bit shank. The indexing washer and cutter bit shank can be indexed as a unit or independently of one another.
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patent: 4552223 (1985-11-01), van der Lely
patent: 4727664 (1988-03-01), Hemphill
Beach Wayne H.
Shirk Steven D.
Bagnell David J.
Kennametal Inc.
Novosad Stephen J.
Trempus Thomas R.
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