US 2014/0213160 A1 · APPARATUS FOR SHARPENING BLADES

Abstract

An apparatus for sharpening blades, such as those used for mowing. A rotary grinder is mounted within an extensible, retractable, and rotatable support assembly. Lockable, rotational adjustment of the position of the grinder about three axes, and translational movement along one axis is thereby provided. A spring attached to one end of the assembly counter-balances the weight of the grinder. An adjacent blade holding fixture maintains the workpiece at a predetermined angle for grinding. A toggle clamp, edge alignment keepers, and a registration pin secure the blade in place. An adapter fixture, including a toggle clamp and an alignment recess, attaches to one end of the blade holding fixture. The adapter fixture has an angled shelf to orient and secure smaller, contoured blades requiring a different edge grinding angle. Once the support assembly is adjustably secured, the grinder is moved along the cutting edge of the blade for sharpening.

Claims20

Dependent claims

An apparatus for sharpening blades, comprising:

a. a frame;
b. a grinder support assembly, said grinder support assembly including a support member having a lower end attached to said frame;
a three-way pivot having a fixed portion mounted to an upper end of said support member;
an elongated grinder support arm having a first end mounted to a movable portion of said three-way pivot;
and, a grinder mount secured to a second end of said grinder support arm;
c. a blade holding fixture, said blade holding fixture including an inclined plate mounted on said frame, said plate including means for detachably securing a blade on said plate.

3 more elements

Dependencies are inferred from the claim text.

Apparatus for sharpening blades

Life of this patent

Apparatus for sharpening blades

Life of this patent

Abstract

Claims20