Device for sharpening rotating blades
AssigneeG. D. Societa per Azioni
InventorRiccardo Mattei
Life of this patent
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Abstract
A device for sharpening rotating blades, in which a transverse approaching movement of a grindstone-carrying shaft towards an associated rotating blade to be sharpened is controlled, within a predetermined range, by a sensor sensitive to the speed of rotation imparted by friction to the said shaft by the associated blade.
Claims7
A device for sharpening rotating blades, comprising at least one grindstone (31) keyed onto a shaft (24) rotatable about its axis inclined with respect to an axis (5) of rotation of an associated said driven rotating blade (3), the periphery of this latter being able to come into contact with each said grindstone (31) to carry the said shaft (24) into rotation by friction;
- a movable support (11) for the said shaft (24), and actuator means (39) to displace the said movable support (11) for the purpose of varying the relative position of the said blade (3) and each said grindstone (31), characterised by the fact that it includes first control means (41) sensitive to the speed of rotation of the said shaft (24), connected to the said actuator means (39) to maintain the said speed above a predetermined value, and second control means (43) for maintaining, in use, the distance between the said axes (5,24) within a predetermined range of values.
Dependencies are inferred from the claim text.