Self-propelled carriage suitable for moving in a cylindrical...

Railways – Tubular way

Reexamination Certificate

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Reexamination Certificate

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07000548

ABSTRACT:
The invention relates to a self-propelled carriage suitable for traveling in a gallery of substantially cylindrical shape. The carriage comprises a chassis (1) made up of two wheel sets (14); a skip (10); and a horizontal longitudinal support axis (16) on which said skip is pivotally mounted. Each wheel set comprises two arms (24, 26) each having a first end pivotally mounted on one end of said axis; two rotary drive shafts (32) extend orthogonally to the support axis and are mounted at the opposite ends of the arms; drive means (38) for rotating said shafts; and two wheels (40, 42), each wheel comprising a hub (54) secured to a respective drive shaft, at least one circular disk secured to the hub, and having its periphery fitted with a plurality of rollers mounted to rotate freely about axes that are orthogonal to the axis of the wheel.

REFERENCES:
patent: 3872940 (1975-03-01), Gambini
patent: 4113202 (1978-09-01), Ueno
patent: 4369713 (1983-01-01), Richardson
patent: 4512258 (1985-04-01), Matsukata
patent: 4526106 (1985-07-01), Okada et al.
patent: 6107795 (2000-08-01), Smart
patent: WO 99/43529 (1999-09-01), None

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