| 摘要 |
A device for pulling a cable may be operated in both a power mode and a spe ed mode. In particular, the device has a frame fixable to a support structure a nd a drum rotatably mounted to the frame for coiling the cable. Two hydraulic cylinder s are pivotally mounted to the frame, each one operatively engaging an opposed sid e of the drum. A brake mechanism is mounted to the frame and is adapted to operativel y engage the drum to prevent recoil when the cabel is pulled. A controller controls delivery of hydraulic fluid to the cylinders and may be operated to switch the device between a power mode where both cylinders operate in unison to provide maximum torque for pulling the cable, and a speed mode where the cylinders operate in tandem to increase th e rate of pull on the cable but at a reduced torque.
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