Implements or apparatus for applying pushing or pulling force – Method or apparatus for placement of conductive wire – By fluid pressure differential in conduit
Patent
1988-04-25
1989-07-18
Schmidt, Frederick R.
Implements or apparatus for applying pushing or pulling force
Method or apparatus for placement of conductive wire
By fluid pressure differential in conduit
2541343R, 138 89, 138 91, B65H 5900
Patent
active
048487341
ABSTRACT:
An improved apparatus for directly pulling lines along an extended length of pipe comprising: a projectile positionable within a pipe, the projectile including a shaft having resilient plates and peripheral washers and also having an eye at its trailing end for the receipt of the line to be pulled thereby; a plug positionable within the end of the pipe adjacent the projectile, the plug having circular concentric rings extending from its exterior surface, the plug being split along a plane from its front surface to its rear surface at an angle with respect to the central axis of the plug for facilitating the placement of the plug around the line and then into the pipe, the plug having a length to diameter ratio of about 0.75:1 or greater; and means for coupling the plug to a source of compressed air which may be passed through the plug to contact and move the projectile along the length of the pipe.
REFERENCES:
patent: 1075842 (1913-10-01), McCutchen
patent: 1205891 (1916-11-01), Harrison
patent: 3793732 (1970-07-01), Hamrick
Holmes David A.
Schmidt Frederick R.
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