Winding mechanism-drive, particularly for construction cranes or

Details Winding mechanism-drive, particularly for construction cranes or Winding mechanism-drive, particularly for construction cranes or

1975-12-18

1978-02-21

Oresky, Lawrence J.

Implements or apparatus for applying pushing or pulling force

Step-by-step traveling bar

Pawl actuated

212 86, 254173R, B66D 130

Patent

active

040748910

ABSTRACT:
A winding mechanism-drive, particularly for construction cranes or the like hoisting devices, including a normal three-phase current-electromotor, a hydrostatic transmission with electronic-hydraulic servo-regulation for the continuous infinite variations of the feeding-speeds and -moments, the motor part of which is operatively connected with a cable drum preferably via a mechanical reduction transmission, as well a spring force-actuated locking brake for the cable drum automatically electro-hydraulically releasing in the balanced condition between load moment and drive moment. The winding mechanism-drive is characterized by the quasi-stationary part of the locking brake, such as for example the brake cheeks with presser linkage rods and releasable spring force-actuating element, being slightly pivotally mounted about an axis concentric to the drive shaft of the hydraulic motor, and standing in cooperative connection with an electric switch in the release circuit for the locking brake, such that the brake is automatically released only with a --minimum--pivotal movement of the brake linkage in a direction of lifting.

REFERENCES:
patent: 2178305 (1939-10-01), Smaltz et al.
patent: 2574378 (1951-11-01), Crookston
patent: 3465850 (1969-09-01), Sexton
patent: 3477695 (1969-11-01), Noly
patent: 3481584 (1969-12-01), Conry et al.
patent: 3523614 (1970-08-01), Walker
patent: 3780990 (1973-12-01), Edlund et al.
patent: 3817033 (1974-06-01), Appel et al.

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