Crane equipped with dual trolleys

Details Crane equipped with dual trolleys Crane equipped with dual trolleys

1975-12-05

1976-11-30

Werner, Frank E.

Traversing hoists

Overhead

Cable

212 63, 212 48, 212 35R, 254145, 254183, B66C 2306

Patent

active

039944018

ABSTRACT:
In a crane having two crabs or trolleys on an approximately horizontal beam of the crane, the trolleys are moved along the beam by two cables whose ends are wound on a common, motor-driven drum, and which are trained over pulleys on the beam and on the trolleys in such a manner that both trolleys are moved jointly at one half of the circumferential drum speed or one trolley is moved at the full drum speed when the other trolley is arrested.

REFERENCES:
patent: 2361331 (1944-10-01), Taylor
patent: 2413701 (1947-01-01), Favie et al.
patent: 3250400 (1966-05-01), Bennett
patent: 3402824 (1968-09-01), Zweifel
patent: 3883859 (1975-05-01), Ancheta

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