Lifting device, in particular, a tackle block

Details Lifting device, in particular, a tackle block Lifting device, in particular, a tackle block

1981-11-13

1984-08-21

Jillions, John M.

Implements or apparatus for applying pushing or pulling force

Device or member for contacting and guiding moving cable

Including rotatable, cable contacting, pulley wheel element

254403, B66D 310

Patent

active

044665997

ABSTRACT:
A tackle block for a cord having a rotatable pulley mounted on a shaft between a pair of legs, there being first and second pulleys mounted on a part of the shaft which is exterior of said legs. A guide sheath formed of a pair of arms is associated with the first pulley and the space between each of the arms and the groove of the first pulley is a minimum necessary for a cord of a certain diameter. The second fixed pulley has its inner plate slidably mounted on the shaft and resiliently biased toward said inner plate, with the inner plate being formed of a material which presents a large amount of friction to the cord. A guide means in the form of a pair of arms, each having a notch is provided on the outer face of the movable plate of the second fixed pulley to lock the cord. A braking shoe is mounted in a movable manner below the rotatable pulley to engage the rotatable pulley.

REFERENCES:
patent: 1130713 (1915-03-01), Daly et al.
patent: 4264056 (1981-04-01), Singer
patent: 4332372 (1982-06-01), Singer

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