Importance

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Abstract

A core eliminator for mining, road working or earth moving machinery in which a bit carrying mounting means is movably secured to a driven element. Means are associated with the driven element and the movable mounting means so as to guide said mounting means at one time into the path of what would otherwise be a core formation, and to guide such mounting means at another time to an out of the way position so that the mounting means may clear the machinery involved. Such means may include resilient, cam, pneumatic, hydraulic, electronic or electric arrangements. In one form of the invention the mounting means is slidably mounted in ways provided in the driven element and urged by resilient means into contact with a cam which extends across a machine member located at one side of the driven element and to which the driven element is secured. In a modification of the invention the slidable mounting means rides on the cam instead of against it. In a further modification of the invention the cam extends along one side of the driven element and is provided with a low profile towards the material being worked and a high profile removed therefrom. The mounting means is pivotally attached to the driven element and provided with means which urges it to extend over the low profile and into the path of what would otherwise be a core formation, the same means urging the mounting means against the cam in the region of the high profile so as to pivot the mounting means to an out of the way position.

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First Claim