公开(公告)号：US5704498A

公开(公告)日：1998-01-06

申请号：US774200

申请日：1996-12-27

申请人： John Kirk Smith ,  Ramesh Purushottam Patel ,  Henry David Barthalow

发明人： John Kirk Smith ,  Ramesh Purushottam Patel ,  Henry David Barthalow

IPC分类号： B66C23/42 ,  B66C23/70 ,  B66C23/74 ,  B66C23/82 ,  B66C23/04

CPC分类号： B66C23/42 ,  B66C23/701 ,  B66C23/74 ,  B66C23/82

摘要： A transportable multi-purpose crane includes a platform having outriggers disposed at opposite ends thereof. A turntable is rotatably mounted to the platform between the outriggers on opposite ends of the platform, and has a center axis of rotation. A riser boom, having a first end and a second end, is pivotally mounted to the turntable at its first end, and the second end supports a first load carrying device. The riser boom points in a first direction with respect to the center axis of rotation, and is a telescoping boom. An upper boom, having a first end and a second end, has its first end pivotally mounted to the second end of the riser boom. The second end of the upper boom supports a second load carrying device. The upper boom points in a second direction, opposite the first direction, with respect to the center axis of rotation, and is a telescoping boom. By providing the riser boom and the upper boom such that the riser boom serves as a counterweight when the second load carrying device carries a load and such that the upper boom serves as a counterweight when the first load carrying device carries a load, the crane does not need a separate counterweight.

摘要翻译： 一种可运输的多功能起重机，其具有设置在其相对端的外伸支架的平台。 转盘可旋转地安装在平台的平台之间，在平台的相对端上的外伸支架之间，并具有中心旋转轴线。 具有第一端和第二端的提升臂在其第一端枢转地安装到转台上，并且第二端支撑第一承载装置。 提升臂相对于中心旋转轴线指向第一方向，并且是伸缩臂。 具有第一端和第二端的上起重臂具有其第一端枢转地安装到提升管悬臂的第二端。 上臂的第二端支撑第二承载装置。 上吊臂相对于中心旋转轴线在与第一方向相反的第二方向上指向，并且是伸缩吊杆。 通过提供升降臂和上起重臂，使得当第二承载装置承载负载时，提升臂用作配重，并且当第一承载装置承载负载时，上吊臂用作配重，起重机 不需要一个单独的配重。