Grapple assembly
US5219265A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 13, 1992 |
| Grant date | Jun 15, 1993 |
| Priority date | — |
| Expiry date | Jan 13, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02F5/10
- WIPO fieldCivil engineering
- WIPO sectorOther fields
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…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.