Grapple assembly

In the installation of underground utilities it is common to utilize an earthmoving machine, such as hydraulic excavator, to dig a trench and aid in the placement of the individual pipe segments that comprise a conduit or pipeline. Normal placement of the pipe segments requires communication between the excavator operator and laborer that is positioned adjacent the pipeline in the trench. As the pipe segments are lowered into position, the laborer insures a proper connection of each joint and the overall support beneath the pipeline. The requirement of another individual in the trench is both inefficient and represents a significant increase in the cost of laying the pipeline. The present invention utilizes a grapple assembly to grasp the individual pipe segments to maneuver them into and within the trench. The grip on the pipe segment is sufficient to permit its insertion into the unfinished pipeline. In addition the grapple assembly is provided with tong assemblies that are mounted in a manner sufficient to allow them avoid contact the bedding material upon release of the pipe segment so as not to disturb the support of the pipeline or they may be utilized in a manner to slightly alter the configuration of the bedding material in the trench to accommodate pipe segments of varying diameter.

Abstract

In the installation of underground utilities it is common to utilize an earthmoving machine, such as hydraulic excavator, to dig a trench and aid in the placement of the individual pipe segments that comprise a conduit or pipeline. Normal placement of the pipe segments requires communication between the excavator operator and laborer that is positioned adjacent the pipeline in the trench. As the pipe segments are lowered into position, the laborer insures a proper connection of each joint and the overall support beneath the pipeline. The requirement of another individual in the trench is both inefficient and represents a significant increase in the cost of laying the pipeline. The present invention utilizes a grapple assembly to grasp the individual pipe segments to maneuver them into and within the trench. The grip on the pipe segment is sufficient to permit its insertion into the unfinished pipeline. In addition the grapple assembly is provided with tong assemblies that are mounted in a manner sufficient to allow them avoid contact the bedding material upon release of the pipe segment so as not to disturb the support of the pipeline or they may be utilized in a manner to slightly alter the configuration of the bedding material in the trench to accommodate pipe segments of varying diameter.

1. Drawings

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