Four-wheeled adjustable vehicle

Details Four-wheeled adjustable vehicle Four-wheeled adjustable vehicle

1983-10-11

1986-01-14

Reese, Randolph A.

Railways

Tubular way

Internal service device

105365, B61B 1310

Patent

active

045639540

ABSTRACT:
A motor driven vehicle for traversing the interior of a pipe or conduit accommodates itself to variations in the interior contour of the pipe and automatically positions itself on the longest axis of any cross section of the pipe. It comprises a pair of two-wheeled trucks each pivotally connected to an end of a stretcher member which urges the trucks away from each other against diametrically opposite paths of travel on the pipe wall. Each truck has a driving wheel and a swivelling wheel, the driving wheels being diagonally opposite each other. The driving wheel motors are servo-connected so as to keep the angles between stretcher and truck bolsters equal. The driving wheels are preferably constructed with rim segments which rotate about axes tangent to the mean circumference of the rim, thereby permitting movement sidewise of the wheel.

REFERENCES:
patent: 1177984 (1916-04-01), Beene
patent: 2897779 (1959-08-01), Perkins
patent: 3078823 (1963-02-01), Cummings et al.

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