US 6,981,598 B1 | ||
Turn-table dual hoisting crane | ||
Rafael Rivera, Magnolia, N.J. (US); and Christopher Clemmer, Allentown, Pa. (US) | ||
Assigned to The United States of America as represented by the Secretary of the Navy, Washington, D.C. (US) | ||
Filed on Jan. 16, 2004, as Appl. No. 10/758,560. | ||
Claims priority of provisional application 60/506404, filed on Sep. 26, 2003. | ||
Int. Cl. B66C 19/00 (2006.01) |
U.S. Cl. 212—325 | 4 Claims |
1. A crane for cyclic transfer of two containers between pick-up and delivery locations, comprising: an elongated boom having a fixed travel path established thereon; frame means for support of the boom with said fixed travel path extending in operative relationship between said pick-up and said delivery locations; a platform having a pair of track paths established thereon; means pivotally mounting the platform on the frame means for angular displacement about a rotational axis at an intersection between said pair of track paths relative to the boom; a pair of trolleys onto which the containers are loaded at the pick-up location and unloaded at the delivery location; and spreader means for respectively suspending said two containers from said pair of trolleys to accommodate transfer thereof between the fixed travel path on the boom and either one of said pair of the travel paths on the platform extending from said intersection in angular relation to each other. |