Oscillation lockout system for track mounted rock drill

Details Oscillation lockout system for track mounted rock drill Oscillation lockout system for track mounted rock drill

1975-12-11

1977-09-06

Silverstrim, John P.

Motor vehicles

Special driving device

Portable track

173 22, 280 611, B62D 5508

Patent

active

040462099

ABSTRACT:
A track type vehicle having pivotable A-frame members and a walking beam structure to permit oscillation of one track relative to the other is equipped with a pair of single acting hydraulic cylinders, each of which is connected between the main frame of the vehicle and one of the track assembly. The cylinders are interconnected by a line having a selector valve. The valve is opened to permit transfer of fluid between the cylinders to permit relative oscillation of the tracks, and the valve is closed to prevent transfer of fluid between cylinders when it is desired to prevent oscillation of the tracks.

REFERENCES:
patent: 2312389 (1943-03-01), Cordes
patent: 2842340 (1958-07-01), Burress
patent: 3088531 (1963-05-01), Garrett
patent: 3117647 (1964-01-01), Polko
patent: 3189116 (1965-06-01), Steffen
patent: 3289779 (1966-12-01), Feucht
patent: 3825088 (1974-07-01), Copeland

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