Coating apparatus – Projection or spray type – Inside of hollow work
Patent
1992-01-13
1993-08-03
Jones, W. Gary
Coating apparatus
Projection or spray type
Inside of hollow work
118DIG10, B05B 1306
Patent
active
052325024
ABSTRACT:
During the installation of underground utilities it is common to utilize an earthmoving machine, such as a 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 require communication between the excavator operator and a laborer that is positioned adjacent the pipe in the trench. As the pipe segments are lowered into position, the laborer insures a proper connection, support, and sealing of each joint in 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 pipe handling apparatus that may be inserted within a segment of pipe with an end face thereof bearing against a flange defined by a pipe supporting cylinder. This connection allows the operator to apply a force to the pipe segment in the direction of engagement with the pipeline to insure connection. A spraying apparatus is defined by the pipe handling apparatus in the pipe at a location that is generally coincident with the pipe joint Upon activation, the spraying apparatus will provide a coating of sealant entirely around the internal portion of the pipe joint. This apparatus permits the excavator operator to dig a trench and set and seal the segments of a pipeline without the aid of additional personnel.
REFERENCES:
patent: 4682182 (1987-07-01), Oyama et al.
patent: 4690327 (1987-09-01), Takai et al.
patent: 4785760 (1988-11-01), Tholome
patent: 4821673 (1989-04-01), Kirigakubo et al.
Caterpillar Inc.
Friedman Charles K.
Jones W. Gary
Perry William C.
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