Patent Application
20090104008
The present invention relates to a load lifting apparatus which is suitable for use in material handling operations, for example carrying loads, which enables loads of various shapes and structures to be readily moved and to be easily released.
To lift and to move a heavy load for example a concrete block or pipe to a desired position are usually desired at a construction site, particularly a construction site of a road or large building. To lift and to move the heavy load, a wire rope or chain may be wound around the load, and the other end of the wire rope or chain may be engaged with a hook of the material-handling equipment. In this state, the load is lifted and moved to the desired position, and then, the wire rope or chain is removed from the load. Alternatively, some loads are lifted and moved to a desired position through the use of an engagement member such as a bolt or hook having been previously attached to the load. Under these circumstances, a wire rope or chain is attached to the engagement member, and the other end of the wire rope or chain is attached to a hook of the material-handling equipment. The material-handling equipment may move the load to the desired location, and then after the load has been moved to the desired location, the wire rope is disengaged from the engagement member which has been attached to the load.
The material-handling equipment, for example a crane, may have a clamping apparatus for clamping to the load to be lifted. This clamping apparatus may be opened by human power or by using a jig for example a hydraulic device to pick up the load to be lifted.
One such clamping device is described in U.S. Pat. No. 6,286,881 where a load lifting apparatus is disclosed that is suitable for use in material-handling operations to enable loads of various shapes and structures for example concrete products to be clamped and released.
Another lifting apparatus is described in U.S. Pat. No. 3,300,062 that describes a lifting apparatus which is capable of lifting pre-cast concrete walls. This patent describes a lifting apparatus having a weight distributing or load spreading units in combination with a lifting unit.
A further lifting apparatus is described in U.S. Pat. No. 2,589,954 that describes a lifting apparatus for lifting and conveying or moving concrete wall slabs. This lifting apparatus allows a concrete wall slab to be raised from a flat or horizontal position to substantially upright position.
It is an object of the invention to provide a lifting apparatus which is capable of efficiently raising a load such as walls, boxes, cylinders and pipes formed from concrete or a similar type of material.
It is an object of the present invention to provide a lifting apparatus which is of compact and lightweight construction and can be formed with the load.
It is an object of the present invention to provide a lifting apparatus which may include an anchor to be formed with concrete or the similar material.
An anchor box for being placed in a solid structure includes a housing member for providing housing for the anchor box and an anchor member connected to the housing member and extending to the solid structure.
The anchor member may extend through a side of the housing member, and the anchor member may include a curved portion.
The anchor member may include an angled portion, and the anchor member may include a longitudinal portion.
The curved portion of the anchor member may be enclosed by the housing member, and a section of the angled portion of the anchor member may be enclosed by the housing member.
A longitudinal portion of the anchor member may be external to the housing member, and the housing member may include a depression member to secure the housing member within the solid structure.
The housing member may include a outwardly projecting member, and the housing member may include a peripheral lip around a front member of the housing member.
The solid structure may be concrete.
The invention may be understood by reference to the following description taken in conjunction with the accompanying drawings, in which, like reference numerals identify like elements, and in which:
Additionally,
While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the drawings and are herein described in detail. It should be understood, however, that the description herein of specific embodiments is not intended to limit the invention to the particular forms disclosed.
