Woodworking – Special-work machine – Stump removing
Patent
1998-12-09
2000-04-11
Bray, W. Donald
Woodworking
Special-work machine
Stump removing
37302, 144334, 144218, 144235, 144241, 24110172, 407113, A01G 2306
Patent
active
060477490
ABSTRACT:
A grinding apparatus for grinding a stump or the like includes a frame, a rotating member supported by the frame, and a plurality of grinding members mounted to the rotating member. The grinding apparatus further includes a first driver which selectively rotates the rotating member about a drive axis, and a second driver which selectively pivots the rotating member about a vertical pivot axis whereby the rotating member pans between at least a first lateral position and a second lateral position. The grinding apparatus preferably further includes a third driver which selectively pivots the rotating member about a horizontal pivot axis whereby the rotating member moves between at least a first vertical position and a second vertical position. The grinding members each include a plurality of spaced apart distal ends, which define a plurality of cutting tips which provide simultaneous vertical and lateral cutting and grinding actions when the rotating member is rotated about the drive axis and the rotating member is simultaneously moved between the lateral positions and the vertical positions by the second and third drivers.
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