Foley-belsaw Company

James H Dieck

Roger K Rosenquist

Gregory A Veenendall

A device and method for sharpening a mower blade are provided, in which a mounting device for mounting a rotary blade having two opposite cutting edges to be sharpened, wherein the mounting device is capable of positioning the blade in a first fixed state and a second, axially pivoting state. One or more grinding head assemblies are each positioned on an opposite end of the blade, wherein the grinding head assemblies respectively grind the two opposite cutting edges to be sharpened. A control system controls movement of the two grinding head assemblies. The mounting device positions the blade in the first fixed state to enable the two grinding head assemblies to grind the cutting edges in a direction substantially parallel to the cutting edges of the blade to perform a straight grind, and then may position the blade in the second axially pivoting state to enable the blade to pivot around its blade rotation axis away from the grinding head assemblies upon completion of the straight grind, thereby forming a curve at the end of each cutting edge. The mounting assembly also holds the blade in a third, freely rotating state in which the blade may substantially freely rotate around its blade rotation axis to enable balancing of the blade after sharpening.

Rotary mower blade sharpener having movable griding wheels

The present invention is a device for relief grinding a blade having a radially outer edge of an elongated length and first and second faces, with the first and second faces extending generally radially from a reel axis. The device includes a rotatable grinding shaft, a grinding wheel, a grinding wheel guide assembly, a guide finger, and a first non-sliding stabilizer.

Mower reel blade grinding device

A grinding system ( ) for sharpening the blades in cutting reels of mowing units incorporates an articulated grinding head ( ) mounted for movement on a carriage ( ). A unique index/guide assembly ( ) is mounted on the grinding head ( ). The index/guide assembly ( ) includes a fixed guide finger ( ) and associated, movable index finger ( ) for automatic sequential grinding of the blades in the spin grind mode.

Automatic mower reel grinder

A grinding system (,) for sharpening the blades in cutting reels of mowing units incorporates an articulated grinding head (,) mounted for movement on a carriage (,). A unique index/guide assembly (,) is mounted on the grinding head (,). The index/guide assembly (,) includes a fixed guide finger (,) and associated movable index finger (,) for automatic sequential grinding of the blades in the spin grind mode.

A grinding system (10) for sharpening the blades in cutting reels of mowing units incorporates an articulated grinding head (90) mounted for movement on a carriage (92). A unique index/guide assembly (160) is mounted on the grinding head (90). The index/guide assembly (160) includes a fixed guide finger (178) and associated movable index finger (180) for automatic sequential grinding of the blades in the spin grind mode.

Growing community of inventors

River Falls, WI, United States of America

James H Dieck