Importance

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Abstract

A line pulling system having a chassis, a reel carrier assembly, an electric power source, and an electric jack assembly. The electric jack assembly can include a housing, a leg configured to extend and retract axially from the housing, an electric motor, a current sensor configured to detect a current supplied to the electric motor, and a controller. The controller can receive current data and, if the current is less than a threshold current, supply a first voltage to the electric motor to cause the electric motor to extend or retract the leg at a first speed. If the current is greater than or equal to the threshold current, the controller can supply a second voltage to the electric motor. The second voltage can cause the electric motor to extend or retract the leg at a second speed that is less than the first speed.

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First Claim