DAVID RICHARD SIDDLE
Engineers in Greensburg, PA

5716167, Feb 10, 1998

Jan 16, 1997

8/783735

David R. Siddle - Greensburg PA
Ted R. Massa - Latrobe PA
John S. VanKirk - Murrysville PA
Kenneth M. Malott - Williamsburg OH

Kennametal Inc. - Latrobe PA

B23C 524

407 36

A cartridge-type milling cutter is provided having a cartridge mounting mechanism that resists the centrifugal load applied to the cartridges at high rotational speeds. The milling cutter includes a generally cylindrical cutter body, at least one replaceable tool cartridge having a trailing face, and a leading face having a cutting insert for cutting a workpiece, and a mounting mechanism for detachably securing the tool cartridge onto the cutter body. The mounting mechanism includes a recess in the cutter body for receiving the cartridge that includes a radially canted wall for providing dovetail-type resistance to radial movement of the cartridge, and at least one compressively loaded set screw in the cutter body for compressively engaging the leading face of the cartridge in order to seat and retain it within the recess. During the operation of the cutter, the centrifugal load is substantially borne by the combination of the radially canted wall and the set screw. The mounting mechanism preferably also includes a screw, optionally radially-oriented, that passes through a through bore in the sides of the tool cartridge for providing additional insurance against the loosening or breaking away of the cartridge during high speed operation.

6790497, Sep 14, 2004

May 24, 2002

10/155572

Ted R. Massa - Latrobe PA
John J. Prizzi - Greensburg PA
David R. Siddle - Greensburg PA

Kennametal PC Inc. - Monrovia CA

B32B 108

428 369, 138140, 138145, 451102, 451 91, 451 90, 451 40

The invention relates to abrasive water jet systems including an abrasive water jet mixing tube having a longitudinal bore lined with a superhard material, including such systems which use cubic boron carbide (CBN), diamond, or other materials with a hardness greater than that of alumina as the abrasive material. The invention also includes methods of using an AWJ system having a mixing tube having a longitudinal bore lined with a superhard material. Some embodiments include AWJ mixing tubes which include a plurality of connected components. Such connections may be disconnectable.

5001823, Mar 26, 1991

Feb 14, 1990

7/479904

Ted R. Massa - Latrobe PA
David R. Siddle - Greensburg PA

Kennametal Inc. - Latrobe PA

B23P 1904

294266

The present invention entails a collet tool for removing a collet from a circumferential retainer and for inserting that collet or another collet into a retainer. The tool includes an elongated sleeve having a collet receiving section formed about one end and a plunger reciprocally mounted within the opposite end of the sleeve. To remove a collet from a retainer, the free end of the collet is inserted into the collet receiving section and the sleeve is pressed onto the collet causing the collet to be radially compressed and lodged within the sleeve and released from its associated retainer. To eject the collet from the sleeve, the plunger is moved into engagement with the collet and the collet is pushed from the sleeve. A collet may be readied for insertion into a retainer by inserting the rear portion of the collet into the collet receiving section. The sleeve is pressed on to the free end of the collet, causing the same to be radially compressed and lodged in the sleeve.

5996714, Dec 7, 1999

Jul 15, 1997

8/893031

Ted R. Massa - Latrobe PA
Robert H. Montgomery - Everett PA
David R. Siddle - Greensburg PA
William P. Losch - Bedford PA

Kennametal Inc. - Latrobe PA

E21B 1062

175413

A cutting bit has a bit body which has a forward end and a rearward end. The bit body contains a seat at the forward end thereof. The bit body contains a bore intersecting the seat wherein a bore wall defines the bore. A cutting insert is received by the seat wherein the cutting insert presents a side surface facing the bore. A wedge has a generally longitudinal seating surface. The wedge has a support surface opposite to the longitudinal seating surface. The wedge is received within the bore so that the longitudinal seating surface of the wedge contacts the side surface of the cutting insert and for at least a portion of the length of the wedge the entire support surface contacts the bore wall so as to frictionally retain the cutting insert in the seat.

6176332, Jan 23, 2001

Dec 31, 1998

9/224397

Ted R. Massa - Latrobe PA
David R. Siddle - Greensburg PA

Kennametal Inc. - Latrobe PA

E21B 1036

1754201

A rotatable cutting bit for penetrating an earth formation wherein the rotatable cutting bit includes an elongate bit body having a forward end and a rearward end. The bit body further defines a peripheral surface. The bit body has a first cutting insert affixed thereto at the axially forward end thereof. The first cutting insert has a first leading cutting edge and a first side clearance cutting edge. The first cutting insert is attached to the bit body so that the first side clearance cutting edge radially extends past the peripheral surface of the bit body so as to engage the earth formation.

7325471, Feb 5, 2008

Sep 7, 2004

10/935480

Ted R. Massa - Latrobe PA, US
David R. Siddle - Greensburg PA, US

Kennametal Inc. - Latrobe PA

B23B 27/16

82 111, 407 33, 407 42, 407 48, 407103, 279 8

A toolholder and cutting insert for a toolholder assembly wherein the cutting insert has a tapered shank which provides a resilient interference fit with a tapered section of a bore extending within the toolholder. Additionally, a rearwardly facing face on the cutting insert abuts with a forwardly facing surface on the toolholder to properly locate the cutting insert within the toolholder.

6315064, Nov 13, 2001

Sep 21, 2000

9/667152

Ted R. Massa - Latrobe PA
David R. Siddle - Greensburg PA

Kennametal PC Inc. - Monrovia CA

E21B 1036

1754201

A rotatable cutting bit for penetrating an earth formation wherein the rotatable cutting bit includes an elongate bit body having a forward end and a rearward end. The bit body further defines a peripheral surface. The bit body has a first cutting insert affixed thereto at the axially forward end thereof. The first cutting insert has a first leading cutting edge and a first side clearance cutting edge. The first cutting insert is attached to the bit body so that the first side clearance cutting edge radially extends past the peripheral surface of the bit body so as to engage the earth formation.

6924454, Aug 2, 2005

May 24, 2002

10/155573

Ted R. Massa - Latrobe PA, US
John J. Prizzi - Greensburg PA, US
David R. Siddle - Greensburg PA, US

Kennametal PC Inc. - Monrovia CA

B23H009/00, B23H009/14, B23K020/00

219 6917, 2281221, 228193, 228194

Methods for making abrasive water jet mixing tubes with superhard materials are presented. Also presented are methods for making a tubular elongate superhard material bodies.

2013007, Mar 28, 2013

Sep 27, 2011

13/246137

Sudhir Brahmandam - Irwin PA, US
David Richard Siddle - Greensburg PA, US
Irene Spitsberg - Export PA, US

Kennametal, Inc. - Latrobe PA

B29C 67/08

425223, 427135

Pelletizing ring extrusion dies comprising a die body having a plurality of holes, wherein each hole has surface at least partially coated with a low-friction coating. The low-friction coatings reduce surface temperatures during operation of the dies, which reduces volatilization and inconsistent flow of the material being extruded. The pelletizing ring extrusion dies possess improved tool life due to the low-friction coatings.

7144210, Dec 5, 2006

Jan 21, 2004

10/762005

Ted R. Massa - Latrobe PA, US
Robert A. Erickson - Raleigh NC, US
David R. Siddle - Greensburg PA, US

Kennametal Inc. - Latrobe PA

B23Q 3/12

409234, 408239 A

A rotary tool holder includes a shank having a flange, a tapered outer surface, and front and rear contact portions. The tapered outer surface corresponds to the tapered bore of a spindle, and flexible circular cantilevers are provided at one or both contact portions such that a free end of the cantilevers expands radially due to centrifugal force to maintain contact with the tapered bore. The shank can be formed from an inner member and a sleeve disposed thereover, in which portions of the sleeve form the circular cantilevers. The circular cantilevers can also be formed by a cavity created in the shank. Alternatively, instead of circular cantilevers, the shank of the tool holder can have a taper which is optimized for a certain speed, wherein the taper of the shank has a first taper at rest and a different, optimized taper at a desired speed.