Boom point sheave assembly

Details Boom point sheave assembly Boom point sheave assembly

1975-05-21

1977-10-11

Makay, Albert J.

Implements or apparatus for applying pushing or pulling force

Portable implements or apparatus for tensioning flexible...

212 59R, B66D 136

Patent

active

040531392

ABSTRACT:
A boom point sheave assembly has a sheave shaft which extends transversely of the boom point pivotally mounted at its center in the boom point. Each end of the sheave shaft extends beyond a side of the boom point and rotatably mounts a sheave. A torque rod having one end anchored to the boom point and its other end fixed to the sheave shaft exerts a restoring torque on the sheave shaft should the sheave shaft pivot away from its normal horizontal position.

REFERENCES:
patent: 2042460 (1936-06-01), Fykse
patent: 2279887 (1942-04-01), Hathorn
patent: 2321549 (1943-06-01), Holmes
patent: 2813636 (1957-11-01), Preston
patent: 2846082 (1959-08-01), Heitz
patent: 3680840 (1972-08-01), Pech
patent: 3684245 (1972-08-01), Marichev et al.
patent: 3757959 (1973-09-01), Thompson et al.
patent: 3797672 (1974-03-01), Vermette
patent: 3829992 (1974-08-01), Reid et al.
patent: 3877581 (1975-04-01), Auxer
patent: 3959899 (1976-06-01), Rangaswam

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