Mining or in situ disintegration of hard material – Hard material disintegrating machines – Percussive-type cutter
Patent
1978-12-11
1981-01-27
Purser, Ernest R.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Percussive-type cutter
173 13, 173 51, 173101, 173123, 299 62, E21C 2746, D21D 910, D02D 706
Patent
active
042471494
ABSTRACT:
An impact mechanism for rock breaking, pile driving and pile extracting, and the like, includes a head assembly (18) with a pair of shank members (24,26) movably mounted thereto and flywheel (76,78) and eccentric crankshaft parts (74) rotated by a motor (84). The crankshaft parts (74) intermittently contact one of the shank members (24,26) to drive it outwardly from the head assembly (18) by transmitting flywheel energy thereto. A biasing and dampening device (110) associated with each shank member (24,26) absorbs rebound energy from the shank member (24,26) and maintains the shank members (24,26) disengaged from the crankshaft parts (74) until it is positively urged thereagainst. The head assembly (18) is movably mounted at the end of an articulated arm (10) for maneuvering it into desired work position.
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Caterpillar Tractor Co.
Purser Ernest R.
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