Slack prevention system for a crowd rope of a power shovel

Details Slack prevention system for a crowd rope of a power shovel Slack prevention system for a crowd rope of a power shovel

1978-12-04

1981-07-14

Kunin, Stephen G.

Material or article handling

Vertically swinging load support

Shovel or fork type

212149, 254270, 414694, B66D 148

Patent

active

042783933

ABSTRACT:
In a power shovel having a main frame, a front end assembly operatively connected to the main frame and a rope crowd system including a rope drum supported on the main frame, a motor supported on the main frame drivingly connected to the rope drum, a brake operatively connected to the rope drum and a rope wound on the drum and operatively connected to the front end assembly, a system for preventing the rope from becoming slack comprising apparatus responsive to an impending slack condition of the rope for actuating the drum brake thereby preventing continued pay out of the rope by the drum and apparatus responsive to motor torque in a pay-out direction for disengaging the motor from the rope drum, allowing the motor to continue to operate in the pay-out direction when said drum brake is actuated.

REFERENCES:
patent: 2380625 (1945-07-01), Zeilman et al.
patent: 2543765 (1951-03-01), Davidson et al.
patent: 2832485 (1958-04-01), Schneider
patent: 3346129 (1967-10-01), Carter et al.
patent: 3843095 (1974-10-01), Rupert
patent: 4150812 (1979-04-01), Baron

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