Mining or in situ disintegration of hard material – Miscellaneous
Patent
1985-04-03
1985-09-24
Novosad, Stephen J.
Mining or in situ disintegration of hard material
Miscellaneous
299 91, 407 8, 407120, E21C 3518
Patent
active
045429430
ABSTRACT:
There is disclosed a base and block assembly for use with an earthworking bit. The assembly comprises a base and a block engaged in the base. The block has a shank portion and a toolholder portion extending from a first end of the shank and adapted for receiving the earthworking bit. The assembly also comprises means for causing the block to preferentially fail when exposed to abnormally high cutting loads. Also disclosed is a method for protecting the base of a base and block assembly when in use with an earthworking bit. The method comprises preferentially weakening the block so as to cause the block to fail when exposed to abnormally high cutting loads and engaging the block with the base.
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Burns Lawrence R.
Goodwin Michael
Kennametal Inc.
Novosad Stephen J.
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