B - Operations – Transporting – 02 – C
Patent
B - Operations, Transporting
02
C
241/27
B02C 1/04 (2006.01) B02C 1/02 (2006.01)
Patent
CA 2004531
Hydraulic control system for controling the movement of a movable jaw of a rock crusher between a first set position and a retracted position. The control system includes a double acting hydraulic ram having first and second ends mounted on the frame of the rock crusher and movable jaw respectively. A source of high pressure hydraulic fluid is provided. A first fluid supply conduit communicates between the source of high pressure fluid and a first fluid chamber of the ram. A second fluid supply conduit communicates between the source of high pressure fluid and the second fluid chamber of the ram. A flow control device is provided in the first and second fluid supply conduits for simultaneously locking hydraulic fluid in the first and second fluid supply conduits to hold the extensible ram in a substantially rigid fixed length condition when in the set position during normal operation of the crusher. A pressure relief device communicates with the first fluid chamber to relieve the pressure in said chamber when the pressure in the first fluid chamber exceeds a predetermined control pressure to free the movable jaw for movement toward said retracted position.
E&e Seegmiller Limited
Gowling & Henderson
LandOfFree
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