Self-propelled, non-riding trenching machine with a steering mec

Details Self-propelled, non-riding trenching machine with a steering mec Self-propelled, non-riding trenching machine with a steering mec

1980-05-09

1982-04-06

Eickholt, E. H.

Excavating

Peat excavators

37191A, E02F 506

Patent

active

043228992

ABSTRACT:
A hydraulic steering mechanism is used in a self-propelled, non-riding trenching machine of the type having a chassis, a power source, a hydraulic pump driven by the power source, a reservoir supplying hydraulic fluid to the hydraulic pump and a digging boom. The steering mechanism includes a front wheel assembly journaled into the chassis, a double acting cylinder pivotally mounted to the chassis, a piston and rod slidably mounted within the cylinder and pivotally connected to the front wheel assembly, a first port located on one side of the piston and a second port located on an opposite side of the piston, and a manually operable three-position valve communicating with the hydraulic pump and the cylinder so that hydraulic fluid can be directed from the pump alternately to the first or second ports causing the rod alternately to extend or retract thereby rotating the front wheel assembly from side to side.

REFERENCES:
patent: 2817167 (1957-12-01), Barber
patent: 2835055 (1958-05-01), Hermes
patent: 2874793 (1959-02-01), Wagner
patent: 2946142 (1960-07-01), Swanson
patent: 2997276 (1961-08-01), Davis
patent: 3006427 (1961-10-01), Van der Lely
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patent: 3087354 (1963-04-01), Malzahn
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patent: 3750762 (1973-08-01), Eaton
patent: 3788415 (1974-01-01), Tilley
patent: 3792745 (1974-02-01), Files
patent: 4103441 (1978-08-01), Flippin
patent: 4193458 (1980-03-01), Meinert et al.
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Sales brochure for Davis Trimline 120, Catalog No. P/NH006346, Mfg. by Davis Mfg., Witchita, Kansas 1977.
Sales Catalog by Ditchwitch, Model 1500 Trencher, Mfg. by Charles Machine Works, Inc., Perry, Ok. 73077, May 1978.

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