Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – By means advancing along terrain and guiding pipe or cable...
Patent
1991-11-07
1993-07-06
Taylor, Dennis L.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
By means advancing along terrain and guiding pipe or cable...
405174, 37350, 37 92, E02F 510
Patent
active
052247970
ABSTRACT:
A rotatable apparatus for placing lengths of flexible pipe and cable a distance beneath the surface of the ground leaving the soil substantially intact. The pipe laying apparatus includes a shaft having an exterior, a plurality of cutting bits removably mounted on the shaft and a device for securing the cutting bits on the shaft. The cutting bits each have a base, a tool bit, and an attachment device to prevent any rotation by the cutting bits relative to the shaft. The tool bits have a leading cutting edge, a cutting surface extending from the leading cutting edge, and an inclined surface separating the cutting surface and the base. As the shaft rotates, the leading cutting edge and the cutting surface cut through the soil and push it in towards the inclined surface, which in turn displaces the soil in an axial direction. The pipe laying apparatus also includes a plurality of spacers removably mounted to the shaft separating the cutting bits. The attachment device includes at least one non-circular configuration in the base and a complementary non-circular configuration in the shaft.
REFERENCES:
patent: 1544409 (1925-06-01), Johnson
patent: 2054129 (1936-09-01), Kelsey
patent: 2196513 (1940-04-01), Adler
patent: 3354660 (1967-11-01), Vaughan
patent: 3930324 (1976-01-01), Wightman et al.
patent: 5007685 (1991-04-01), Beach et al.
Caplan Julian
Ricci John
Taylor Dennis L.
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