Patent ID: 9238902
Filing Date: 2016-01-19
CPC Classification: B60G,B62D,E01C,E02F,E21C

Claim Text:
1. An excavating machine comprising: a main chassis; a plurality of propulsion structures on which the main chassis is supported; an excavation component carried by the main chassis, the excavation component being selected from the group consisting of a surface mining drum and a digging chain mounted on a trenching boom; an engine supported on the main chassis for powering the propulsion structures and the excavation component; a cab supported on the main chassis, the cab including first and second ends spaced-apart from one another along a direction parallel with a length of the main chassis; and a suspension supporting the cab, the suspension including at least one cushion having a natural frequency less than 5 Hertz, the suspension also including an elastomeric dampener mounted nearer to the first end of the cab than to the at least one cushion, the suspension allowing for a vertical cab displacement of at least 0.5 inch upwardly from a neutral position and at least 0.5 inch downwards from the neutral position at the cushion; wherein the at least one cushion is mounted nearer to the second end of the cab than to the elastomeric dampener, the allowed vertical cab displacement at the cushion thereby configuring the suspension to provide larger vertical cab displacements at the second end of the cab than at the first end of the cab.