Lawrence J Rhoades

US Patent:

6503126, Jan 7, 2003

Filed:

Sep 12, 2000

Appl. No.:

09/660008

Inventors:

Lawrence J. Rhoades - Pittsburgh PA

Assignee:

Extrude Hone Corporation - Irwin PA

International Classification:

B24B 100

US Classification:

451 36, 451 51, 451 60, 451 61, 451 76, 134 24

Abstract:

A method and apparatus are disclosed for abrading the inner surface at the intersection region of a branch outlet with the wall of a body having a passageway. Using abrasive flow machining, it is possible to abrade the intersection region to provide a smooth transition between the wall and the branch outlet.

US Patent:

6544110, Apr 8, 2003

Filed:

Aug 14, 2001

Appl. No.:

09/929614

Inventors:

James Randall Gilmore - Ligonier PA
Lawrence J. Rhoades - Pittsburgh PA

Assignee:

Extrude Hone Corporation - Irwin PA

International Classification:

B24B 100

US Classification:

451106, 451 36, 451113, 451170

Abstract:

The present invention is based on the practice of abrasive machining with no sealed working chamber by the employment of a visco-elastic abrasive medium, behaving predominantly as an elastic solid at the applied strain of the orbital working motion, and applying orbital or other relative working motion to produce strain rates which bring the medium into a predominantly elastic deformation and often near, but not to exceed, the compressive stress limit at the strain rate employed. The preferred visco-elastic abrasive medium is a rheopectic poly(boro-siloxane) filled with viscosity increasing stiffening agents and high loadings of the abrasive of choice and relatively mono amounts of plasticizers. The system is operated in an open chamber under applied strain rates such that at least 50%, particularly about 50 to 99%, and preferably about 80 to 95%, of the deflection of the medium under the conditions of operation occurs by elastic deformation and is elastically recovered, and less than 50% particularly about 1 to 50%, preferably about 5 to 20%, of the deflection of the medium occurs by fluid or plastic flow.

US Patent:

6645056, Nov 11, 2003

Filed:

Nov 9, 2000

Appl. No.:

09/711339

Inventors:

James Randall Gilmore - Ligonier PA
Lawrence J. Rhoades - Pittsburgh PA

Assignee:

Extrude Hone Corporation - Irwin PA

International Classification:

B24B 700

US Classification:

451270, 451 56

Abstract:

A method for producing, from a blank, restrictive tooling for use in an orbital polishing machine involves urging one of either the workpiece or the blank along a predetermined path against the other to physically impart a proportioned contour of the workpiece into the blank, thereby producing the restrictive tooling. Using this method, the same orbital polishing machine may be used to produce the restrictive tooling and to subsequently polish the workpiece.

US Patent:

6701529, Mar 9, 2004

Filed:

Jan 21, 2000

Appl. No.:

09/489513

Inventors:

Lawrence J. Rhoades - Pittsburgh PA
John M. Matechen - Irwin PA
Mark J. Rosner - Greensburg PA

Assignee:

Extrude Hone Corporation - Irwin PA

International Classification:

F41H 104

US Classification:

2 25, 2455, 442135, 528 30, 525477, 556402, 4282974, 4282997, 428372

Abstract:

The present invention relates to an energy absorbent medium which is compliant and conformable in the absence of an applied force, and stiffens in response to the rate of an applied force to dissipate energy. The medium comprises a blend of a polymer and a lubricant incompatible with the polymer to produce a conformable absorbent which exhibits dilatant (shear thickening) characteristics under high rates of force or stress. The polymer has reformable sacrificial chemical bonds which are broken under a high rate of deformation and which reform under static conditions. Suitable polymers for the invention include polyborosiloxanes. Applications for the medium include absorbent for sports padding, athletic equipment, motor vehicle seats, bulletproof vests, medical equipment, industrial equipment, weaponry, and playing fields.

US Patent:

6918937, Jul 19, 2005

Filed:

Aug 14, 2001

Appl. No.:

09/929696

Inventors:

James Randall Gilmore - Ligonier PA, US
Lawrence J. Rhoades - Pittsburgh PA, US

Assignee:

Extrude Hone Corporation - Irwin PA

International Classification:

C09G001/02
C09G001/04

US Classification:

51307, 51308, 51309, 51298, 106 3

Abstract:

The present invention is based on the practice of abrasive machining with no sealed working chamber by the employment of a visco-elastic abrasive medium, behaving predominantly as an elastic solid at the applied strain of the orbital working motion, and applying orbital or other relative working motion to produce strain rates which bring the medium into a predominantly elastic deformation and often near, but not to exceed, the compressive stress limit at the strain rate employed. The preferred visco-elastic abrasive medium is a rheopectic poly(boro-siloxane) filled with viscosity increasing stiffening agents and high loadings of the abrasive of choice and relatively mono amounts of plasticizers. The system is operated in an open chamber under applied strain rates such that at least 50%, particularly about 50 to 99%, and preferably about 80 to 95%, of the deflection of the medium under the conditions of operation occurs by elastic deformation and is elastically recovered, and less than 50% particularly about 1 to 50%, preferably about 5 to 20%, of the deflection of the medium occurs by fluid or plastic flow.

US Patent:

6953387, Oct 11, 2005

Filed:

Nov 12, 2004

Appl. No.:

10/988176

Inventors:

John M. Greenslet - Saitama, JP
Lawrence J. Rhoades - Pittsburgh PA, US

Assignee:

Extrude Hone Corporation - Irwin PA

International Classification:

B24B001/00

US Classification:

451 36, 451 8, 451559

Abstract:

A method and apparatus for comparing the flow rate through an orifice within a master part with the orifice within a workpiece by subjecting each orifice to an identical fluid at an identical temperature, under an identical pressure, and comparing the downstream pressures of the fluid exiting these orifices when the upstream pressure is constant or comparing the upstream pressure when the downstream pressure is constant. For purely measurement purposes, the fluid may be a non-abrasive media, however, in the event the workpiece orifice must be machined, it is possible to introduce a flowable abrasive media, and pass this media through the orifices until the desired pressure difference is achieved. With additional flow characteristics of the master part, it is also possible to calculate the flow rate through the workpiece orifice using only the pressure differential at the exits of the workpiece and the master part.

US Patent:

7044842, May 16, 2006

Filed:

Dec 18, 2002

Appl. No.:

10/323532

Inventors:

Lawrence J. Rhoades - Pittsburgh PA, US

Assignee:

Extrude Hone Corporation - Irwin PA

International Classification:

B24C 3/32

US Classification:

451 76, 451 99, 451102

Abstract:

A method and apparatus are disclosed for abrading the inner surface at the intersection region of a branch outlet with the wall of a body having a passageway. Using abrasive flow machining, it is possible to abrade the intersection region to provide a smooth transition between the wall and the branch outlet.

US Patent:

7182675, Feb 27, 2007

Filed:

May 15, 2006

Appl. No.:

11/434305

Inventors:

Lawrence J. Rhoades - Pittsburgh PA, US

Assignee:

Extrude Hone Corporation - Irwin PA

International Classification:

B24C 3/32

US Classification:

451 76, 451 99, 451102

Abstract:

A method and apparatus are disclosed for abrading the inner surface at the intersection region of a branch outlet with the wall of a body having a passageway. Using abrasive flow machining, it is possible to abrade the intersection region to provide a smooth transition between the wall and the branch outlet.