Robert W Britzke

6372012, Apr 16, 2002

Jul 13, 2000

09/616112

Shivanand Majagi - Rogers AR
Jimmy W. Eason - The Woodlands TX
Robert W. Britzke - Rogers AR

Kennametal Inc. - Latrobe PA

C22C 2600

75236, 75232, 75238, 75242, 75243

A superhard filler hardmetal having a superhard material filler, binder metal or matrix and in some instances at least a first hard component is disclosed. The superhard filler hardmetal has a porosity rating of substantially A06, B00, C00 or better and may be essentially pore free, i. e. , A00, B00, C00. The superhard filler hardmetal is formed by mechanically mixing a superhard material, in some instances at least a first hard component and a binder metal or matrix precursor, shaping the mixture into a green body and consolidating the green body at a preselected temperature, superatmospheric pressure and time at temperature and time at superatmospheric pressure sufficient to form the superhard filler hardmetal. The consolidation preferably occurs without the formation of a liquid in the body and at least a portion of the time at superatmospheric pressure is at the preselected temperature. Diamond filler and boron nitride filler are examples of superhard materials usable as filler.

6521353, Feb 18, 2003

Aug 23, 1999

09/378869

Shivanand Majagi - Bentonville AR
Robert W. Britzke - Rogers AR

Kennametal PC Inc. - Monrovia CA

C22C 105

428565, 75236

A hard alloy material comprising tungsten carbide in an amount of 50 to 80 weight percent of the material, titanium carbide in an amount of at least about 10 weight percent, and a binder material of cobalt and nickel. Though tungsten carbide based, the thermal conductivity of the material of the invention is between 10 and 20 Watt/m K. In other aspects of the invention, molybdenum and chromium are included to further lower the thermal conductivity of the material. In yet another aspect of the invention, one or more nitrides or carbonitrides of titanium and/or zirconium are included in the material.

6908688, Jun 21, 2005

Aug 4, 2000

09/632400

Shivanand Majagi - Rogers AR, US
Robert W. Britzke - Rogers AR, US
Daniel W. Nelson - Rogers AR, US

Kennametal Inc. - Latrobe PA

B32B003/10

428552, 428565

A multiple-region hardmetal tool piece. The tool piece includes a hardmetal body including a hard particle component and a binder; an additional body, the additional body including a hardmetal body having a hard particle component and a binder; a metal body or a ceramic body; a substantially discontinuous gradient-free boundary layer between the hardmetal body and the additional body; and a mating surface between the hardmetal body and the additional body. In the preferred embodiment, the hard particle components are a carbide, such as tungsten carbide. In the preferred embodiment, the mating surface includes a male portion on one of the bodies and a corresponding female portion on the other of the bodies. The mating surface is symmetrical or asymmetrical and, in the preferred embodiment, the mating surface is axially symmetrical, such as a dimple. The mating surface may further including both micro and macro mating features.

7416146, Aug 26, 2008

Aug 2, 2001

09/921430

Robert W. Britzke - Eureka Springs AR, US

Kennametal Inc. - Latrobe PA

B02C 19/00

241300, 241275

The present invention is particularly, but not exclusively, useful for reducing wear of component parts of impact crushers caused by earth aggregate flows during operation of impact crushers. The present invention includes a stepped central feed cone that allows for cylindrical carbide rods to be press fit therein to reduce wear. The downward steps of the stepped cone urge material fed to the stepped cone outwardly to the table. The top surface of a first rod inserted into a first bore formed in the impeller housing extends a distance beyond the bottom of a second bore on the next step up. The first rod protects the housing material forming the second bore from being washed out by material flow. In one embodiment, the impeller shoes have a geometric shape that reduces excessive normal forces and accompanying high friction of the material against the shoe. The reduction in high friction significantly reduces the wear rate.

47845430, Nov 15, 1988

Aug 25, 1987

7/089116

James L. Mitchell - Owasso OK
Robert W. Britzke - Rogers AR

Rogers Tool Works, Inc. - Rogers AR

B23B 2920

409234

A quick change tool holder having a cutting head on which a cutting member is attached for attachment to a shank. A lockpin/locknut arrangement provides for quick and safe removal of the cutting head from the shank. The lockpin has radial projections that rotate in response to manual rotation of the lockpin in and out of recesses contained in the opening of the locknut. The lockpin is secured within a bore in the cutting head and extends out of that bore into a bore in the shank in which bore the locknut is secured. A spring and plunger combination is located in the bore of the shank in order to urge the cutting head away from the shank when the radial projections are not within the recesses of the locknut. The shank and the cutting head have corresponding mating teeth in order to prevent rotation of the cutting head relative to the shank when the cutting head and shank are attached.

53870190, Feb 7, 1995

Dec 2, 1993

8/160726

Robert W. Britzke - Rogers AR

Rogers Tool Works, Inc. - Rogers AR

B25B 902
B25J 1512

294 2

A gripping tool having a main body with a plurality of gripping ends. A first body arm is integral to and extends outward from the main body at one of the plurality of gripping ends. A first upper jaw is formed on the first body arm with a first clamping arm flexibly mounted to the first body arm by a pivot member. The first clamping arm has a first lower jaw formed thereon. Also, a method for grasping a tool by first applying a compressive force between a fixed arm and a clamping arm on one side of a pivot member to open a set of jaws on the opposite side of the pivot member. The open jaws are then moved in a direction perpendicular to the compressive force to arrange the open jaws around the shaft of a tool such that the tool is grasped when the compressive force is released.

59315423, Aug 3, 1999

Mar 18, 1997

8/828173

Robert W. Britzke - Rogers AR
H. Alan King - Rogers AR

Rogers Tool Works, Inc. - Rogers AR

E21C 35197

299104

A wear prevention device for use with roadmilling or trenching machine blocks which hold rotatable cutting bits. The wear prevention device includes a substantially cylindrical retainer sleeve with a longitudinally directed slot running the length of the sleeve. The wear prevention device also includes a substantially circular wear washer with a radially inwardly directed key which is adapted to fit within the sleeve slot, thereby interlocking the sleeve and the wear washer. The retainer sleeve is adapted to receive a shank of a cutting bit and is placed within a bore in a machine block. The machine block bore may further include a keyway, or the machine block may include a boss surrounding the machine block bore with the keyway The retainer sleeve may further include a radially outwardly directed key adapted to fit within the machine block bore keyway, thereby further interlocking the retainer sleeve with the machine block.

60297565, Feb 29, 2000

Oct 27, 1997

8/958087

Robert W. Britzke - Rogers AR
Harry E. Nover - Woodlands TX

Rogers Tool Works, Inc. - Rogers AR

E21B 1060

175 57

A nozzle assembly for use in a drill bit includes a nozzle body having a nozzle oriented at an angle to the longitudinal axis of the nozzle body and a positioning ring that is rotationally and axially locked to the nozzle body. The nozzle body includes a plurality of facets extending between a pair of retention surfaces. The positioning ring has a plurality of teeth and is operatively disposed between the retention surfaces to axially retain the ring on the nozzle body. When positioned between the retention surfaces, the teeth engage the facets to rotationally lock the ring to the nozzle body. The positioning ring may have a longitudinal split, to allow the ring to ratchet relative to the nozzle body, and a pair of spanner-receiving apertures. In operation, the ring is coupled to the nozzle body and the resultant assembly is coupled to the drill bit. Any misalignment is noted and the assembly is removed from the drill bit.