Traversing hoists – Having means to prevent or dampen load oscillations – Antisway
Reexamination Certificate
2006-03-24
2009-02-24
Brahan, Thomas J. (Department: 3654)
Traversing hoists
Having means to prevent or dampen load oscillations
Antisway
Reexamination Certificate
active
07494020
ABSTRACT:
The invention relates to a lifting machinery of four reel differential type for two 40 feet container shore crane comprising: motors, reductors, high speed brakes, reels and reel brakes; wherein at least one motor is provided; the reductor connected at the motor output end is a planetary differential reductor having a plurality of high speed input shafts, low speed output shafts and the differential project shafts; the high speed input shaft connects to the motor output shaft, at least one high speed brake is provided on the high speed input shaft; four two-project rope reels are connected to the four low speed output shaft; at least one reel brake is provided to each reel; and a differential shaft brake consisting of at least two differential shaft brakes provided on two differential project shaft is also included; the revolution of the two differential project shaft of the planetary differential reductor is controlled by the two differential shaft brakes so that power of the planetary differential reductor may be distributed, and both the synchronous operation of two hanger tool or the separate operation of a single hanger tool can be carried out. The present invention meets the loading and unloading requirement and increases the loading and unloading efficiency of the container crane by more than 60%.
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Shan Jianguo
Zhang Baohua
Brahan Thomas J.
Dorsey & Whitney LLP
Shanghai Zhenhua Port Machinery Co., Ltd.
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