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 1063079
ABSTRACT OF THE DISCLOSURE A relief mechanism for a jaw crusher which includes a hydraulic fluid filled piston-cylinder arrangement mounted on the frame and connected to the rear toggle of the jaw crusher. The hydraulic fluid is connected to a pressure sensor and a relief valve. The hydraulic fluid is maintained at a predetermined pressure during normal crushing operations. Upon encountering a material which cannot be crushed, the rear toggle transmits the higher than set pressure to the piston- cylinder arrangement thereby increasing the fluid pressure in the piston-cylinder arrangement. A pressure sensor senses this increased pressure and opens the relief valve to dump the entire hydraulic system. As the hydraulic system is dumped, the piston moves into the cylinder. The relief valve is sized so that the fluid is exhausted from the cylinder at a rate which allows unrestrained movement of the piston during relief. A positive stop on the piston-cylinder arrangement insures pressurizing of the system. An interlock with the crusher motor may be provided to shut down the crusher when tramp is encountered.
223486
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