| 摘要 |
<p>IMPROVED TROLLEY FOR HOISTS OR THE LIKE The trolley is especially arranged for and to be utilized in connection with supporting a hoist on an I-beam or the like. The trolley includes two pairs of wheels rotatably supported by a pair of parallel spaced carriage members. The wheels are in rolling engagement with the I-beam. The carriage members extend downwardly therefrom and are connected at their lower end by a hoist supporting member which is arranged to receive the hoist. The carriage members inlude an indentation in the outside thereof forming an embossment in the inside surfaces thereof to provide the maximum stiffness for the carriage members while at the same time, decreasing the distance between the carriage members that must be spanned by the hoist supporting member.</p> |
