Pipeline crawler

Railways – Tubular way – Internal service device

Patent

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Details

B61B 1310

Patent

active

043697135

ABSTRACT:
A pipeline crawler comprises a wheeled power unit and a tractor unit having a plurality of driven wheels for engagement with the interior wall of a pipeline. A flexible power transmission extends from the power unit to the tractor unit for driving the driven wheels and includes a relational connection to permit rotary movement of the tractor unit relative to the power unit.

REFERENCES:
patent: 2604521 (1952-07-01), Boucher
patent: 3094942 (1963-06-01), Blumel
patent: 3552765 (1971-01-01), Ostwald
patent: 3691385 (1972-09-01), Ketchbaw et al.
patent: 3718978 (1973-03-01), Van Klevering et al.
patent: 3904878 (1975-09-01), Burch et al.
patent: 4006359 (1977-02-01), Sullins et al.
patent: 4170902 (1979-10-01), Pallan

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