Highway vehicle with hydraulically driven power dolly

Details Highway vehicle with hydraulically driven power dolly Highway vehicle with hydraulically driven power dolly

1973-12-17

1978-04-04

Paperner, L. J.

Motor vehicles

Vehicle trains

Motorized trailer

280421, 280476R, B62D 5904

Patent

active

040821579

ABSTRACT:
An over-the-highway tractor-trailer vehicle including a tractor coupled in towing relationship to a forward trailer, and a dolly for towing a rearward trailer behind the forward trailer. The dolly has a hydraulically driven power unit. A hydraulic pump is driven by the tractor engine, and connects with a first set of flexible hydraulic hoses. A hydraulic motor is provided to drive the dolly, and connects with a second set of flexible hydraulic hoses. The sets of hoses releasably connect with conduits carried under the bed of the forward trailer. When the tractor is "dead headed" without a trailer or towing only one trailer, the sets of hoses are directly coupled so as to power the dolly drive.

REFERENCES:
patent: 2161153 (1939-06-01), Gallun et al.
patent: 2447185 (1948-08-01), Keim
patent: 2852273 (1958-09-01), Hudson
patent: 2875644 (1959-03-01), Mancini
patent: 3170667 (1965-02-01), Szohatsky
patent: 3246714 (1966-04-01), Middlesworth et al.
patent: 3246912 (1966-04-01), Cunha
patent: 3293942 (1966-12-01), Stein et al.
patent: 3479055 (1969-11-01), Cunha et al.
patent: 3612202 (1971-10-01), Moon et al.

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