Woodworking – Special-work machine – Stump removing
Patent
1997-05-30
1998-11-03
Bray, W. Donald
Woodworking
Special-work machine
Stump removing
144337, 24110172, 24110174, 37 92, 180 537, A01G 2300, A01G 2306
Patent
active
058294970
ABSTRACT:
A stump grinder designed for pivotable attachment to the three point hitch of an agricultural tractor via a pivot frame and includes a stump grinding wheel driven by the tractor PTO. The stump grinder includes a frame with an outer sleeve which telescopes over an inner sleeve, which inner sleeve is attached, in turn, to a stump grinder assembly which includes the grinding wheel. A first, telescoping hydraulic piston & cylinder unit selectively extends the stump grinding assembly and a second reciprocating piston & cylinder unit selectively pivots or reciprocates the stump grinder assembly from side to side. An optional hydraulic pump can be attached to the stump grinder assembly to drive one or both piston & cylinder units if the tractor is not so equipped.
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patent: 5435359 (1995-07-01), Craft
patent: 5655581 (1997-08-01), Craft
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