Device for repairing pipe joints

Details Device for repairing pipe joints Device for repairing pipe joints

1994-02-07

1996-06-18

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

Product or preform repair or restoring means

156 94, 264 36, 425 13, B29C 4520

Patent

active

055271693

ABSTRACT:
A device for repairing cast iron pipe joints comprises a head having a motor for actuating a tool and a body, the head being pivotally connected to the body so that it can be pivoted from an axial position to a radial position within the pipe. In a preferred embodiment, the head includes a motor driving a drill bit. A retractable foot is extended to force the head against the pipe wall to be pierced by the drill bit, following which sealant is injected into a hollow drill shaft and flows up the helical grooves of the drill bit into the pipe joint cavity. Preferably a pair of guide wings maintains the device centered in the pipe and raised off of the pipe floor, and the operator monitors progress of the device through a video monitor.

REFERENCES:
patent: 2977994 (1961-04-01), Xenis
patent: 3315017 (1967-04-01), Kemp
patent: 3606913 (1971-09-01), Yie
patent: 4421698 (1983-12-01), Vanderlans
patent: 4442891 (1984-04-01), Wood
patent: 4504204 (1985-03-01), Koga
patent: 4582551 (1986-04-01), Parkes et al.
patent: 4646787 (1987-03-01), Rush et al.
patent: 4986314 (1991-01-01), Himmler
patent: 5044824 (1991-09-01), Long et al.
patent: 5223272 (1993-06-01), Pringle
patent: 5259880 (1993-11-01), Fujita et al.

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