Patent ID: 6036035
Filing Date: 2000-03-14
Classification: B66C

Abstract:
A crane comprising:a boom;a jib, which can be stored parallel to a side face of said boom;a rotary bracket, which is rotatably attached to a front end of said boom and which is attached to said jib so that rotation of said rotary bracket can swing said jib outwardly from said side face of said boom to a position in front of said boom wherein said jib is connected to said boom at a front end portion of said boom when said jib is to be used;an end sheave, which is detachably attached to a lower portion of a front end of said boom;a rotating device, for rotating said rotary bracket; anda first connecting link for vertically rotatably connecting said end sheave and a front upper portion of said boom and for positioning said end sheave above and in front of said boom; andwherein rotation of said rotary bracket in a forward direction of said boom causes said end sheave to be located above said rotary bracket and to be resting thereupon.