Cab mounting for mining machine

Claim 1

In a mining machine or the like having a chassis defining a base generally parallel to the mine floor, means for mounting two cabs which can be independently and transversely extended outside the nominal width of the chassis comprising: at least one larger diameter tube mounted to said chassis parallel to the base of the chassis and transverse thereto, said large tube extending substantially the width of the said chassis, said large tube having a first open end and a second open end with a bushing positioned therein, one medium diameter tube coaxial with the large diameter tube and having an exposed end extending outwardly of said first large open end, one small diameter tube coaxial with said large and medium diameter tubes and having an exposed end extending outwardly of said second end through said bushing, the large, medium and small diameter tubes being telescoped one over the other, the inner and outer diameters of said tubes and the bushing being such that facing surfaces are in sliding engagement, the length of said medium and small tubes being less than the length of the large tube but long enough so that when both are at their outermost extension they still interengage, two cab supporting brackets each having at least one partially cylindrical arm which slides over the outer surface of the large tube, one cab bracket being secured to the exposed end of the small diameter tube and the other cab bracket being secured to the exposed end of the medium diameter tube, first extensible hydraulic means attached at one end to one cab bracket and at another end to the chassis and second extensible hydraulic means attached at one end to said other cab and at another end to the chassis, whereby independent extension of said first and second extensible means provides for the independent transverse extension of said cab brackets.