Tire lifting device

B - Operations – Transporting – 66 – D

Patent

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224/39, 254/59

B66D 1/04 (2006.01) B62D 43/04 (2006.01)

Patent

CA 2024565

A take-up reel is provided suitable for use in a carrier-lifting device, the take-up reel for taking up cable as a coil and comprises a pair of plates, a central hub carrying an outer peripheral surface about which a cable may be wound. The central hub may also carry a recess in the hub. An anchor secures one end of the cable between the plates and presents an abutment and locking surface. A cable follower is pivotally biased to engage the outer surface of the coil of cable being taken-up and let out from the take-up reel. The cable follower is adapted to abut an abutment when the cable has been substantially let out (played out) to preclude further rotation of the take-up reel. In one embodiment, the take-up reel comprises a pair of spaced parallel plates, one plate carrying an integrally formed (stamped) raised cylindrical hub comprising a cylindrically rounded circular peripheral edge remote from plate and the second plate carrying a recess of substantially the same inner diameter as the circular peripheral edge, the recess defined by a circular wall extending away from the plane of the plate in a direction away from the other plate, the circular wall of the recess having a depth less than the distance from the circular peripheral edge of the cylindrical hub to the plate to which the hub is secured, the end of the wall defining the recess remote from the plate in which the recess is disposed being rounded to mate with the rounded circular peripheral edge of the hub. A torque limiter is also provided employing a spring plate and parallel oriented clutch plate in face to face indentations (or depressions) and gaps for receiving the indentations (or depressions) when the torque limiter transfers torque from the spring plate to the clutch plate, the indentations extending towards the gaps and riding in the gaps when torque is transferred from the spring plate to the clutch plate and for exiting from the gaps when the torque cannot be transferred to the clutch plate. The connection between the take-up reel and torque limiter is effected by a special pin construction to ensure maximum torque transfer to the reel from the torque limiter.

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