Kennametal Inc.

Daniel C Statler

Ted Richard Massa

Gerald L Woods

Gary John Condon

Terry A Manway

Kenneth J Topka

Andrew G Mayer

Charles P Baldwin

James C Courtney

The present invention provides for carbide edge snowplow and grader blades that are durable and fracture resistant. The carbide along the blade edge and blade bottom which contacts the surface being treated is designed to limit the degree of fracture of the carbide. Carbide inserts along the edge and/or bottom are separated from each other by a steel alloy spacer/shim along the width of the blade. The spacer/shim reduces the potential for impact damage cracks that form in a carbide insert from propagating into adjacent inserts along the width of the blade. In one embodiment, the improved blade edge comprises an edge body having a lower edge with a recess and separate slot in the bottom surface of the edge. Within the blade recess and blade slot are positioned carbide block/bar inserts separated by spacer means made from a ductile material.

Fracture resistant carbide snowplow and grader blades

A tiered level cutting system and method that guides a user through the process of selecting an appropriate tool or adapter for specific cutting conditions and/or applications. The cutting system may include a plurality of blocks, one or more sleeves for each block, and a plurality of cutting tools. The method includes the steps of selecting a block for a user's particular operation, optionally, selecting a sleeve based on the selected block, and selecting a cutting tool based on the selected sleeve. The cutting system is selected based upon the type of machinery and cutting environment. The block is selected based upon the particular operation. Operation categories may include severe, heavy, medium and light based upon conditions. The cutting tool is selected based upon the shape and carbide content. The steps can be performed in most any suitable order.

Method of selecting a cutting system

A drill steel-chuck assembly which includes a drill steel which has a plurality of faces and opposite ends. The drill steel has one portion adjacent one of the opposite ends thereof and a mediate portion spaced apart from the one portion. The drill steel further has one transition portion between the one portion and the mediate portion so as to join the one portion and the mediate portion. The one portion of the drill steel presents a first orientation of the faces. The mediate portion of the drill steel presents a second orientation of the faces. The one transition portion of the drill steel presents a twisted orientation of the faces comprising a generally constant twist of the faces from the first orientation of the one portion to the second orientation of the mediate portion. There is a chuck for attachment to the drill steel through engagement with the transition portion of the drill steel.

Lockable drill steel and chuck assembly

Growing community of inventors

Greensburg, PA, United States of America

Daniel C Statler