| 摘要 |
The cable puller uses a compound handle to create great leverage in order to generate a large pulling force with a minimal amount of force applied by the operator. The pulling force can be used for heavy lifting applications. The cable puller could be used to hoist motors, shafts, gears, automobile engines, construction material, machinery and other heavy objects. The cable puller could also be used in the demolition of building structures, the erection of buildings and towers, straightening collision damage, opening railroad car doors, securing tent structures, stretching fence and wire, and tightening conveyor belts. In one embodiment, the handle creates a lever ratio of 65:1. In this instance, 8,000 lbs. can be lifted with an exertion of 123 lbs. of force by the operator. The compound handle is formed by a driven member that engages and rotates the ratchet wheel. A cable is taken up by the wheel in order to move objects. The driven member is connected to a driving member by a connection member. The driving member has a handle grasped by the user and pivoted in order to cause the driving motion of the ratchet wheel.
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