Patent ID: 9228316
Filing Date: 2016-01-05
CPC Classification: E02F

Claim Text:
1. A circle drive assembly for a motor grader, comprising: a circle member being rotatable about a rotation axis, the circle member adapted to adjustably control a work implement; a first hydraulic cylinder for rotatably driving the circle member, the first hydraulic cylinder having a first end; a second hydraulic cylinder for rotatably driving the circle member, the second hydraulic cylinder having a second end; a first coupling mechanism coupled to the first end of the first hydraulic cylinder, where the first coupling mechanism is controllably moved between a coupled position and an uncoupled position, the first end coupled to the circle member via the first coupling mechanism when the first coupling mechanism is in the coupled position, the first end uncoupled from the circle member and moveable relative to the circle member when the first coupling mechanism is in the uncoupled position; and a second coupling mechanism coupled to the second end of the second hydraulic cylinder, where the second coupling mechanism is controllably moved between a coupled position and an uncoupled position, the second end coupled to the circle member via the second coupling mechanism when the second coupling mechanism is in the coupled position, the second end uncoupled from the circle member and moveable relative to the circle member when the second coupling mechanism is in the uncoupled position; wherein the first hydraulic cylinder rotatably drives the circle member when the first coupling mechanism is in the coupled position and the second hydraulic cylinder rotatably drives the circle member when the second coupling mechanism is in the coupled position.