| 摘要 |
In the present invention, there is provided a mobile crane for hoisting movable articles and for being towed to and from an article hoisting site behind a pickup truck having a hitch attachment. The mobile crane comprises a frame having a front end, a rear end, a pair of front wheels and a pair of rear wheels. The mobile crane also has a mast extending vertically from the frame and a boom support bracket affixed to the mast. A telescopic boom having a far end and a near end is movably cantilevered in the boom support bracket. A tow bar is removably connected to the far end of the boom. The tow bar has a hook-up member mounted thereon and is connectable to the hitch attachment of the pickup truck. A double-acting hydraulic cylinder is connected between the boom support bracket and the boom for raising the front wheels off the ground when the hook-up member is connected to the hitch attachment. The frame has lug plates affixed to the front end thereof for optionally retaining rigging between the boom and the frame. Thus, when the hook-up member is connected to the hitch attachment and when the front wheels are lifted off the ground, the front end of the frame is securable in the raised position to the boom of the crane, whereby the mobile crane is safely towed behind the pickup truck.
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