Armored Rigging System

Pending Publication Date: 2020-03-26
CAMPBELL RICHARD V
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0026]The present invention comprises an assembly and method for using a flexible tensile member as part of the rigging for a heavy machine such as those used in the mining industry. The inventive tensile member includes a core surrounded by a separate armor layer. The armor layer assumes various forms, including a hollow cyl

Problems solved by technology

The bucket itself often weighs many tons.
The bucket assembly is operated in a brutal environment.
Such chains are quite heavy.
The size and weight of the chains make them difficult and dangerous to handle.
In addition, the chains rapidly elongate while in use—primarily because of link-to-link abrasion.
This elongation alters the dumping geometry of the bucket assembly and reduces its performance.
In addition to the hostile environment created by dropping, dragging, and lifting the bucket, one must also consider the hazards of deliberately laying the assembly on the ground.
The spreader bar may weigh several tons and even the dump block assembly may exceed one ton in weight.
Thus, the reader will perceive that even though the tensile members in the upper and/or lower hoist assemblies lie above th

Method used

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Examples

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Example

[0130]FIG. 6 shows a cross section of an armored tensile member made according to the present invention. Stranded core 54 carries the tensile bad. This stranded core preferably comprises advanced synthetic filaments. Examples of such advanced synthetic filaments include DYNEEMA, SPECTRA, TECHNORA, TWARON, KEVLAR, VECTRAN, PBO, carbon fiber, and glass fiber. In general the individual filaments have a thickness that is less than that of human hair. The filaments are very strong in tension, but they are not resistant to battering and cutting forces. Hence, they have not traditionally been used in hostile environments such as the mining industry.

[0131]The core in the example of FIG. 6 includes seven separate strands (six strands around one center strand). Each of these strands include the aforementioned synthetic filaments. The strands are often braided or twisted into a known pattern. They may also contain more traditional constituents (such as steel wires). A cable or strand including...

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Abstract

An assembly and method for using a flexible tensile member as part of the rigging for a heavy machine such as those used in the mining industry. The inventive tensile member includes a core surrounded by a separate armor layer. The armor layer assumes various forms, including a hollow cylinder having a substantial wall thickness. The core produces excellent strength in tension (and with a substantial reduction in weight). The armor layer protects the core from external blows and forces produced by the weight of the other parts of the machine's rigging and the hostile environment in which the machine operates.

Description

CROSS-REFERENCES TO RELATED APPLICATIONS[0001]This non-pro visional patent application claims the benefit of multiple prior applications. These prior applications are U.S. Pat. App. Ser. No. 62 / 694,079 anti U.S. Pat. App. Ser. No. 62 / 694,069, both filed on Jul. 5, 2018. BACKGROUND OF THE INVENTION1. Field of the Invention[0002]This invention relates to the field of mining and excavation equipment. More specifically, the invention comprises an improved tensile member for such machinery that reduces the need for wire rope and heavy chains.2. Description of the Related Art[0003]In order to understand the significance of the present invention, it is important to have some understanding of conventional mining and excavation machinery. FIG. 1 shows dragline bucket assembly 10. As those skilled in the art will know, the dragline bucket assembly is lifted and positioned by a boom crane—typically a very large boom crane. Bucket 24 is usually made of thick steel. The width of the bucket's mou...

Claims

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Application Information

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IPC IPC(8): D07B1/16D07B1/04
CPCD07B2201/2083E02F3/58D07B2401/2075D07B2201/1016E02F3/48D07B1/162D07B1/04D07B2501/2015D07B2201/2086D07B1/18D07B5/006D07B2201/2091F16G11/042F16G11/025E02F3/65
Inventor CAMPBELL, RICHARD V.
Owner CAMPBELL RICHARD V
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