Mining or in situ disintegration of hard material – Hard material disintegrating machines – Cutter attached to endless chain or cable
Patent
1991-10-01
1992-12-01
Valenza, Joseph E.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
Cutter attached to endless chain or cable
299 44, 198520, E21C 2732
Patent
active
051674378
ABSTRACT:
A retraction mechanism for drawing a plough drive chain into a chain channel of a coal plough guide built onto the side of a scraper chain conveyor comprises a retraction slide which can be drawn through the chain channel and guided. The plough chain is connected to the slide which, via a chain section and a chain claw can be connected to an external traction drive, preferably to the scraper chain assembly of the scraper chain conveyor, so that the mechanism can draw the plough drive chain through the chain channel. The traction chain incorporates an overload clutch which limits the traction force. The clutch has two complementary parts one of which has a detent ball pressed by a prestressed spring into a detent recess of the other clutch part, so that the clutch is closed. A releasable lock or fixing device secures the detent ball in its released position.
REFERENCES:
patent: 4063781 (1977-12-01), Georg et al.
patent: 4332421 (1982-06-01), Merten et al.
patent: 4583785 (1986-04-01), Breuer et al.
Hermann Martin
Merten Gerhard
Valenza Joseph E.
Westfalia Becorit Industrietechnik GmbH
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