Robert W Erickson

US Patent:

7144210, Dec 5, 2006

Filed:

Jan 21, 2004

Appl. No.:

10/762005

Inventors:

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

Assignee:

Kennametal Inc. - Latrobe PA

International Classification:

B23Q 3/12

US Classification:

409234, 408239 A

Abstract:

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.

US Patent:

7306238, Dec 11, 2007

Filed:

Mar 1, 2005

Appl. No.:

11/069399

Inventors:

Robert E. Oshnock - Latrobe PA, US
Michael R. McCormick - Greensburg PA, US
Robert A. Erickson - Raleigh NC, US

Assignee:

Kennametal Inc. - Latrobe PA

International Classification:

B23B 31/12
B23B 31/20

US Classification:

279 20, 279 461, 279 48, 408 59

Abstract:

An assembly generally comprises a collet for receiving a cutting tool shank and a lock nut for creating a gripping force between the collet and the cutting tool shank. The collet has a nose and the lock nut has a front face that is substantially flush with the nose. The lock nut further has a fastening element that mates with a fastening element of a coolant sealing ring for attaching the coolant sealing ring to the lock nut so that the coolant sealing ring may be detached from the lock nut.

US Patent:

7669308, Mar 2, 2010

Filed:

Jun 11, 2007

Appl. No.:

11/811464

Inventors:

Robert E. Oshnock - Latrobe PA, US
Michael R. McCormick - Greensburg PA, US
Robert A. Erickson - Raleigh NC, US
Keith Wiggins - Greensburg PA, US

Assignee:

Kennametal Inc. - Latrobe PA

International Classification:

B23P 11/00
B23B 31/20

US Classification:

29453, 29243, 279 42, 279 48, 279 52

Abstract:

An collet and lock nut assembly includes a collet for receiving a cutting tool shank and a lock nut for creating a gripping force between the collet and the shank. The collet has a nose portion and a body portion separated by an annular groove. The lock nut has a plurality of retention tabs and a corresponding number of clear portions. The collet and lock nut assembly can be easily assembled by inserting at least one retention tab within the groove of the collet, and then applying pressure to the collet such that the remaining retention tabs of the lock nut are received within the groove of the collet to place the assembly in a locked position. The collet and cutting tool shank can be drawn from the tool holder by applying rotational torque to the lock nut. The collet is easily removed from the lock nut by applying pressure in any circumferential, lateral direction against the collet.

US Patent:

7832967, Nov 16, 2010

Filed:

Mar 13, 2008

Appl. No.:

12/047904

Inventors:

Bernhard Borschert - Bamberg, DE
Dieter Mühlfriedel - Ebermannstadt, DE
Jürgen Schwägerl - Vohenstrauss, DE
Ruy Frota De Souza - Latrobe PA, US
Michael D. Shultz - Derry PA, US
Michael R. McCormick - Greensburg PA, US
Robert A. Erickson - Raleigh NC, US

Assignee:

Kennametal Inc. - Latrobe PA

International Classification:

B23B 51/02

US Classification:

408231, 408227, 408713

Abstract:

A rotary cutting tool that is composed of a tool shank with at least one chucking groove or chip flute and one exchangeable cutting insert. At the tip of the shank a recess for accommodating the cutting insert is provided. The tool shank, on its circumference, has a limb with a bearing surface that is inclined relative to the tool axis and that corresponds to a likewise inclined bearing surface on a wing of the cutting insert. The inclination of the bearing surfaces produces an axial force that retains the cutting insert on the tool shank. The abstract of the disclosure is submitted herewith as required by 37 C. F. R. 1. 72(b). As stated in 37 C. F. R. 1. 72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure. ” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims.

US Patent:

8366358, Feb 5, 2013

Filed:

Jul 30, 2010

Appl. No.:

12/847216

Inventors:

Bernhard Borschert - Bamberg, DE
Dieter Mühlfriedel - Ebermannstadt, DE
Jürgen Schwägerl - Vohenstrauss, DE
Ruy Frota De Souza, Jr. - Latrobe PA, US
Michael D. Shultz - Derry PA, US
Michael R. McCormick - Greensburg PA, US
Robert A. Erickson - Raleigh NC, US

Assignee:

Kennametal Inc. - Latrobe PA

International Classification:

B23B 51/02

US Classification:

408231, 408226, 408230, 408713

Abstract:

A rotary cutting tool that is composed of a tool shank with at least one chucking groove or chip flute and one exchangeable cutting insert. At the tip of the shank a recess for accommodating the cutting insert is provided. The tool shank, on its circumference, has a limb with a bearing surface that is inclined relative to the tool axis and that corresponds to a likewise inclined bearing surface on a wing of the cutting insert. The inclination of the bearing surfaces produces an axial force that retains the cutting insert on the tool shank.

US Patent:

7261302, Aug 28, 2007

Filed:

Mar 3, 2005

Appl. No.:

11/071805

Inventors:

Robert E. Oshnock - Latrobe PA, US
Michael R. McCormick - Greensburg PA, US
Robert A. Erickson - Raleigh NC, US
Keith Wiggins - Greensburg PA, US

Assignee:

Kennametal Inc. - Latrobe PA

International Classification:

B23B 31/20

US Classification:

279 48, 279 42, 279 52, 29243

Abstract:

A collet and lock nut assembly includes a collet for receiving a cutting tool shank and a lock nut for creating a gripping force between the collet and the shank. The collet has a nose portion and a body portion separated by an annular groove. The lock nut has a plurality of retention tabs and a corresponding number of clear portions. The collet and lock nut assembly can be easily assembled by inserting at least one retention tab within the groove of the collet, and then applying pressure to the collet such that the remaining retention tabs of the lock nut are received within the groove of the collet to place the assembly in a locked position. The collet and cutting tool shank can be drawn from the tool holder by applying rotational torque to the lock nut. The collet is easily removed from the lock nut by applying pressure in any circumferential, lateral direction against the collet.

US Patent:

7360974, Apr 22, 2008

Filed:

Aug 19, 2004

Appl. No.:

10/921781

Inventors:

Bernhard Borschert - Bamberg, DE
Dieter Mühlfriedel - Ebermannstadt, DE
Jürgen Schwägerl - Vohenstrauss, DE
Ruy Filho Frota De Souza - Latrobe PA, US
Michael D. Shultz - Derry PA, US
Michael R. McCormick - Greensburg PA, US
Robert A. Erickson - Raleigh NC, US

Assignee:

Kennametal Inc. - Latrobe PA

International Classification:

B23B 51/02

US Classification:

408231, 408226, 408713, 408230

Abstract:

A rotary cutting tool that is composed of a tool shank with at least one chucking groove or chip flute and one exchangeable cutting insert. At the tip of the shank a recess for accommodating the cutting insert is provided. The tool shank, on its circumference, has a limb with a bearing surface that is inclined relative to the tool axis and that corresponds to a likewise inclined bearing surface on a wing of the cutting insert. The inclination of the bearing surfaces produces an axial force that retains the cutting insert on the tool shank. The abstract of the disclosure is submitted herewith as required by 37 C. F. R. 1. 72(b). As stated in 37 C. F. R. 1. 72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure. ” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims.

US Patent:

20130209189, Aug 15, 2013

Filed:

Feb 1, 2013

Appl. No.:

13/756990

Inventors:

DIETER MUHLFRIEDEL - EBERMANNSTADT, DE
JURGEN SCHWAGERL - VOHENSTRAUSS, DE
RUY FROTA DE SOUZA, JR. - LATROBE PA, US
MICHAEL D. SHULTZ - DERRY PA, US
MICHAEL R. MCCORMICK - GREENSBURG PA, US
ROBERT A. ERICKSON - RALEIGH NC, US

Assignee:

KENNAMETAL, INC. - LATROBE PA

International Classification:

B23B 51/00

US Classification:

408227

Abstract:

A tool shank for use with a cutting insert in a rotary cutting tool includes a body having, and adapted to be rotated about, a central longitudinal tool axis, the body having a tip portion structured to receive at least a portion of the cutting insert therein. The shank also includes a pair of chip flutes formed in the body and a pair of recesses, each recess bordering a respective chip flute. Each recess includes a rim portion extending perpendicular to the tool axis and a bearing surface extending at an incline relative to the tool axis. Each rim portion is adapted to engage a corresponding surface on the cutting insert. Each bearing surface is adapted to engage a corresponding bearing surface on the cutting insert in a manner such that the cutting insert is pulled against the body when the rotary cutting tool is rotated about the tool axis.