Drill assembly and valve

A drill assembly comprising a drill for drilling rock, a support for supporting the drill, a valve for releasably securing the support and drill together, wherein the valve is adapted to receive a fluid from a pump means and controllably provide the drill and the support with the fluid for operation of the drill and the support.

A valve adapted to secure a drill to a support leg, the valve is adapted to control the flow of a hydraulic fluid from a hydraulic power pack to the support leg and the drill, wherein the valve comprises a body having a first valve inlet adapted to be in fluid communication with the power pack, a first fluid outlet adapted to be in fluid communication with the drill, a second fluid outlet adapted to be in fluid communication with the support leg, a return outlet adapted to be in fluid communication with the power pack to return fluid thereto, wherein the valve incorporates a dump valve which is movable between a normal position for normal operation, and a dump position wherein fluid is caused to pass through the valve and return to the power pack without diverting to the support leg or drill.

A valve adapted to secure a drill to a support leg, the valve is adapted to control the flow of a hydraulic fluid from a hydraulic power pack to the support leg and the drill, wherein the valve comprises a body having a first valve inlet adapted to be in fluid communication with the power pack, a first fluid outlet adapted to be in fluid communication with the drill, a second fluid outlet adapted to be in fluid communication with the support leg, a return outlet adapted to be in fluid communication with the power pack to return fluid thereto, wherein the valve incorporates a regulator which, in operation, is adapted to stop the flow of fluid to the drill when the pressure of the fluid in the support leg exceeds a preselected parameter.