Railways – Tubular way – Internal service device
Patent
1990-07-13
1992-01-14
Oberleitner, Robert J.
Railways
Tubular way
Internal service device
105365, B61B 1310
Patent
active
050800205
ABSTRACT:
A traveling device moving along an elongated member includes support members arranged spaced apart from each other, an elastic contractible body arranged between the support members and expansible radially outwardly to cause contracting force in axial directions, an elastic member causing a force against the contracting force of the elastic contractible body, anchoring devices provided on the support members, respectively, and expansible to engage the elongated member when being supplied with a pressurized fluid, and a plurality of control cables each extending through one of the support members and connected with one end to the other support member. The traveling device can move along straight and curved portions of the elongated member by supplying and exhausting the pressurized fluid into and from the elastic contractible body and operating the control cables in response to alternate supply and exhaust of the pressurized fluid into and from the anchoring devices.
REFERENCES:
patent: 3224734 (1963-10-01), Hill
patent: 4372161 (1983-02-01), de Buda et al.
patent: 4403551 (1983-09-01), Slight
patent: 4522129 (1985-06-01), Jerberyd
Nihon Kohden Corporation
Oberleitner Robert J.
Young Lee W.
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