David Reece Workman

US Patent:

6545244, Apr 8, 2003

Filed:

Aug 27, 2001

Appl. No.:

09/940390

Inventors:

Jerry E. Gould - Columbus OH
Lawrence R. Lehman - Columbus OH
David P. Workman - Dublin OH

Assignee:

Edison Welding Institute - Columbus OH

International Classification:

B23K 1106

US Classification:

219118, 219119, 219 82, 219 83

Abstract:

A welding arrangement comprises first and second parts to be welded with an edge portion of the first part and an edge portion of the second part juxtaposed to form a weld zone. An electrically-conductive sheet(s) with a higher melting temperature than a melting temperature of the first and second parts are placed over the weld zone and a force application device is used to apply a lateral compressive force to the weld zone. First and second electrodes are placed in contact with the electrically conductive sheet(s) which are resistively heated and in turn conductively heat the weld zone.

US Patent:

7111376, Sep 26, 2006

Filed:

Sep 16, 2003

Appl. No.:

10/662457

Inventors:

Keith M. Lombardi - Farmington CT, US
David Workman - Dublin OH, US
Stephen R. Crosby - Broad Brook CT, US

Assignee:

The Stanley Works - New Britain CT

International Classification:

B23P 19/04
B23D 63/02
B25B 7/02

US Classification:

29428, 29268, 29248, 29505, 76 64, 81421

Abstract:

A tool includes first and second elongated members, each member having a handle portion at one end and a jaw portion at an opposite end. Intermediate portions of the members are movably coupled to one another. Movement of the handle portions opens and closes the jaw portions. Each jaw portion includes a gripping surface configured to grip a workpiece. A pair of blade members are rigidly secured to the jaw portions, each blade member having a cutting edge.

US Patent:

7126076, Oct 24, 2006

Filed:

Feb 5, 2004

Appl. No.:

10/772701

Inventors:

David P. Workman - Dublin OH, US
Timothy J. Trapp - Upper Arlington OH, US
Jerry E. Gould - Grandview Heights OH, US

Assignee:

Edison Welding Institute, Inc. - Columbus OH

International Classification:

B23K 11/00

US Classification:

2191171, 228119

Abstract:

A method for repairing defects in a metallic substrate including the steps of placing a consumable filler slug in contact with the substrate in the vicinity of the defect; bringing a first electrode and a second electrode in contact with the consumable slug and applying a pressure to the consumable slug; and transmitting electrical current between the electrodes for a period, thereby resistively heating the consumable slug and the metallic substrate resulting in coalescence in a substantially liquid pool that fills the defect. The pool is then cooled to solidification under the pressure of the electrodes. The electrodes are then removed from contact with the consumable slug and excess material may be removed. The consumable slug may be formed as a single unit or multiple sections, and may incorporate sacrificial retainers to add additional defect filling material, retain the pool, and seal the pool from atmosphere.

US Patent:

7141754, Nov 28, 2006

Filed:

Nov 5, 2004

Appl. No.:

10/983154

Inventors:

David Page Workman - Dublin OH, US
Timothy Joseph Trapp - Upper Arlington OH, US
Jerry Ellison Gould - Grandview Heights OH, US

Assignee:

Edison Welding Institute, Inc. - Columbus OH

International Classification:

B23K 11/00

US Classification:

2191171, 228119

Abstract:

A method for repairing defects in a substrate including the steps of placing a consumable filler slug in contact with the substrate in the vicinity of the defect; placing at least one electrically conductive cover sheet in contact with a portion of the consumable filler slug; bringing a first electrode and a second electrode in contact with the at least one cover sheet and applying a force; and transmitting electrical current between the electrodes, thereby resistively heating the at least one cover sheet and conductively heating the consumable slug and a portion of the substrate resulting in coalescence in a substantially liquid pool that fills the defect. The pool is then cooled to solidification under pressure. Alternative embodiments eliminate the need for the conductive cover sheet(s) by utilizing electrodes having increased electrical and thermal resistance. The consumable slug may be formed as a single unit or multiple sections, and may incorporate sacrificial retainers.

US Patent:

7467741, Dec 23, 2008

Filed:

Oct 21, 2003

Appl. No.:

10/689771

Inventors:

David P. Workman - Dublin OH, US

Assignee:

Cabot Corporation - Boston MA

International Classification:

C23C 14/34
B23K 20/12

US Classification:

228114, 2281121, 228115, 228116, 228136, 228164, 228166, 228167, 228168, 228171, 2281732, 228165, 228193, 228194, 228195, 20429812, 20419813

Abstract:

A method of forming a sputtering target assembly and the sputtering target assembly made therefrom are described. The method includes bonding a sputtering target to a backing plate at a low temperature. Also described is a method of forming a sputtering target assembly such that a gap is formed between the sputtering target and the backing plate. Also described is a method of forming a sputtering target assembly providing a mechanism to prevent unintended sputtering into the backing plate.

US Patent:

20090250439, Oct 8, 2009

Filed:

Mar 27, 2009

Appl. No.:

12/412685

Inventors:

DAVID WORKMAN - Dublin OH, US
Fabian Orth - Hilliard OH, US
Timothy Stotler - Columbus OH, US

International Classification:

B23K 11/00

US Classification:

219 7802, 2191171

Abstract:

A method for forming a clad structure utilizing a moving resistance energy source. The method forms a metallurgical bond between a cladding layer and a primary layer such that at least 2% of a cladding layer surface is metallurgically fusion bonded to a primary layer surface. The fusion bond does not extend all the way through the primary layer or the cladding layer. Either, or both, of the layers may incorporate surface texturing to reduce the contact area between the layers, and melting point suppressants may be incorporated into the method.

US Patent:

20110233293, Sep 29, 2011

Filed:

Mar 26, 2010

Appl. No.:

12/661965

Inventors:

Richard F. Kral - North Riverside IL, US
Shane A. Mayhill - Crete IL, US
David P. Workman - Dublin OH, US

International Classification:

E01B 5/02
B23K 11/00

US Classification:

238122, 219 55

Abstract:

A rail repair method and insert therefor enables repair of rails and rail-like structures. A rail defect is initially identified and removed as contained within a volumetric material portion so as to form a contoured void while maintaining continuity of the rail opposite the void. A pre-formed insert is then placed into the void thereby effecting a rail-to-insert interface. Current is driven through the interface as force directs the insert against the rail. Resistance heat and pressure weld the insert to the rail. The flash welding aspects remove oxides and other impurities from the interface, and the forge welding aspects create a robust solid state weld. Excess material, whether flash, rail, or insert-based, is removed during the finishing processes to provide a virtually seamless rail repair. The solid state weld repair insert and underlying methodology enabled thereby may be used to repair any number of targeted metallic rail-like structures.

US Patent:

20130284706, Oct 31, 2013

Filed:

Jun 25, 2013

Appl. No.:

13/926639

Inventors:

Richard F. Kral - North Riverside IL, US
Shane A. Mayhill - Crete IL, US
David P. Workman - Dublin OH, US

International Classification:

B23K 11/00
E01B 29/42

US Classification:

219 55, 2940207

Abstract:

A rail repair method enables repair of rails and rail-like structures. A rail defect is initially identified and removed as contained within a volumetric material portion so as to form a contoured void while maintaining continuity of the rail opposite the void. A pre-formed insert is then placed into the void thereby effecting a rail-to-insert interface. Current is driven through the interface as force directs the insert against the rail. Resistance heat and pressure weld the insert to the rail. The flash welding aspects remove oxides and other impurities from the interface, and the forge welding aspects create a robust solid state weld. Excess material, whether flash, rail, or insert-based, is removed during the finishing processes to provide a virtually seamless rail repair. The solid state weld repair methodology may be used to repair any number of targeted metallic rail-like structures.