E - Fixed Constructions – 02 – F
Patent
E - Fixed Constructions
02
F
E02F 3/30 (2006.01) E02F 3/407 (2006.01)
Patent
CA 2121774
A power shovel comprising a frame, a winch mounted on the frame, a boom having a lower end mounted on the frame and having an upper end, a sheave pivotally mounted on the boom adjacent the upper end of the boom, a dipper handle mounted on the boom for pivotal movement relative thereto and relative to a dumping position, a dipper mounted on the forward end of the dipper handle and having closed and open conditions for respectively containing and dumping a load and further including a latch mechanism for releasably securing the dipper in the closed condition, and a hoist rope extending over the sheave and having one end connected to the winch and an opposite end connected to the dipper such that when the dipper handle is in the dumping position the hoist rope exerts on the dipper a force biasing the dipper to the open condition when the latch mechanism is released.
Harnischfeger Corporation
Ridout & Maybee Llp
LandOfFree
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