Blade sharpener
OwnerNorman T. Conklininventor
Life of this patent
Estimating the term…
Abstract
A blade sharpener features a blade supporting ramp pivotally adjustable relative to a motor driven abrasive belt for purposes of accommodating the sharpener for use with a wide range of blade widths and shapes. The sharpener incorporates a protractor scale, a ramp scale and a compensating scale adapted for use in measurement of the blade or edge angle of a blade to be sharpened and in setting of the ramp in a desired pivotally adjusted position required to effect proper sharpening of such blade.
Claims14
In a sharpening device for sharpening a blade having a cutting edge defined by cutting edge surfaces converging towards one another from adjacent opposite side surfaces of said blade, said cutting edge surfaces defining an edge angle and said side surfaces defining a blade angle, the improvement for sharpening said blade to provide a desired edge angle comprising in combination:
- means for driving abrasive means for movement along a path of travel;
- support means having a planar supporting surface for supporting said side surfaces by surface-to-surface to position said edge surfaces in engagement with said abrasive means, said support means being adjustable for varying an included angle defined by said supporting surface and said abrasive means to arrange said edge surfaces in engagement with said abrasive means for removing material therefrom as required to provide said desired edge angle;
- and
- included angle control means for cooperating with said supporting surface to measure said blade angle and provide edge angle indicia for adjusting said included angle as required to effect sharpening of said blade to provide said desired edge angle.
A powered sharpener for sharpening a blade having a cutting edge defined by cutting edge surfaces converging towards one another from adjacent opposite side surfaces of said blade, said cutting edge surfaces defining an edge angle and said opposite side surfaces defining a blade angle, said sharpener comprising:
- means including a platen for supporting a power driven abrasive belt for movement in a plane past a blade sharpening station;
- a blade planar supporting ramp having a supporting surface for supporting said opposite side surfaces for surface-to-surface engagement and terminating in a leading edge;
- means for supporting said ramp at said station to selectively vary an included angle defined by said supporting surface and said belt as said leading edge is displaced along said plane in the direction of movement of said belt, while being maintained parallel thereto;
- an edge guard having a guide surface disposed parallel to said leading edge of said ramp;
- means for supporting said edge guard for reciprocating movement in said direction of movement towards and away from said leading edge, whereby when a blade to be sharpened has one side surface thereof disposed in surface to surface engagement with said supporting surface to position an adjacent one of said cutting edge surfaces in engagement with said belt, said edge guard may be disposed in engagement with a surface of said blade opposite to that supported by said ramp;
- and
- included angle control means for cooperating with said supporting surface to measure said blade angle and provide edge angle indicia for adjusting said included angle as required to effect sharpening of said blade to provide said desired edge angle.
Dependencies are inferred from the claim text.