Overload protection apparatus for hoisting machine

Details Overload protection apparatus for hoisting machine Overload protection apparatus for hoisting machine

1977-02-02

1978-08-01

Hoffman, Drayton E.

Implements or apparatus for applying pushing or pulling force

Step-by-step traveling bar

Pawl actuated

254186R, B66D 100

Patent

active

041038720

ABSTRACT:
The disclosure relates to an overload protection apparatus for hoisting machine such as rope hoists or chain blocks. The apparatus has a slipping gear unit and a ratchet gear unit which are arranged on a shaft in a reduction gear assembly. The ratchet gear unit is adapted to be applied with a torque only when the hoisting machine is lowering the load, so as to impart an additional functional force to the slipping gear unit during a braking.

REFERENCES:
patent: 360544 (1971-09-01), Redelman
patent: 3249187 (1966-05-01), McDowall
patent: 3727887 (1973-04-01), Lytle
patent: 3741527 (1973-06-01), Dahl

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