David L Sigler

US Patent:

6861609, Mar 1, 2005

Filed:

Jul 1, 2003

Appl. No.:

10/611840

Inventors:

David Rudolph Sigler - Shelby Township MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B23K011/00

US Classification:

2191171, 219119

Abstract:

A design of copper welding electrode is disclosed. The electrode can be used in successive spot welding operations on assembled aluminum alloy sheet parts of widely varying thicknesses, e. g. , from 0. 9 to 4 mm. The electrode has a round body terminating in a truncated cone with a crowned face. The face has a diameter of about eleven millimeters up to the diameter of the body and the radius of the crowned face is about twenty to thirty millimeters. The dimensions and shape of the electrode provide robust welding performances despite varying part thicknesses and off angle electrode positioning, and the textured surface provides good electrical contact.

US Patent:

6902768, Jun 7, 2005

Filed:

Feb 13, 2002

Appl. No.:

10/075106

Inventors:

John Robert Smith - Birmingham MI, US
David Rudolph Sigler - Shelby Township MI, US
Richard Earl Teets - Bloomfield Hills MI, US
Larry Edward Byrnes - Rochester Hills MI, US
Martin Stephen Kramer - Clarkston MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B05D001/08
C23C004/06

US Classification:

427449, 427453, 427455, 427456

Abstract:

The cylinder walls of light metal engine blocks are thermally spray coated with a ferrous-based coating including aluminum using an HVOF device. A ferrous-based wire is fed to the HVOF device to locate a tip end of the wire in a high temperature zone of the device. Jet flows of oxygen and gaseous fuel are fed to the high temperature zone and are combusted to generate heat to melt the tip end. The oxygen is oversupplied in relation to the gaseous fuel. The excess oxygen reacts with and burns a fraction of the ferrous-based feed wire in an exothermic reaction to generate substantial supplemental heat to the HVOF device. The molten/combusted metal is sprayed by the device onto the walls of the cylinder by the jet flow of gases.

US Patent:

7252218, Aug 7, 2007

Filed:

Dec 17, 2003

Appl. No.:

10/738402

Inventors:

Xiaohong Gayden - West Bloomfield MI, US
Yen-Lung Chen - Troy MI, US
David R Sigler - Shelby Township MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B23K 31/02

US Classification:

2282352, 228215, 228183, 29890042

Abstract:

An anti-bonding material is placed in a desired pattern onto a first sheet of conductive material. A second sheet of conductive material is roll bonded with the first sheet of material. Fluid is injected between the bonded first and second sheets of material to expand the sheets of material at the desired pattern. A flow channel is formed at the desired pattern between the first and second sheet during fluid injection.

US Patent:

7258263, Aug 21, 2007

Filed:

Dec 17, 2003

Appl. No.:

10/738481

Inventors:

David R Sigler - Shelby Township MI, US
Yen-Lung Chen - Troy MI, US
Xiaohong Gayden - West Bloomfield MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B23K 31/02

US Classification:

228157, 228215, 2282352, 228183, 29890042

Abstract:

A method for making a current collector plate includes providing a first sheet of material having a first bonding face and a first outer face. A second sheet of material is provided having a second bonding face and a second outer face. A work area is defined on at least one of the first bonding face and the second bonding face. The first and second sheets are bonded together at a bonding area which is different from the work area. The bonded first and second sheet is placed into a die having a pattern defining at least one flow channel. Fluid is injected between the first and second sheets thereby causing at least one of the first and second sheets to project outward at the work area causing at least one flow channel to be formed in the work area as defined by the die pattern.

US Patent:

7451907, Nov 18, 2008

Filed:

Aug 6, 2004

Appl. No.:

10/913690

Inventors:

David R. Sigler - Shelby Township MI, US
Xiaohong Gayden - West Bloomfield MI, US
Yen-Lung Chen - Troy MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B23K 31/02

US Classification:

228157, 228245, 2282352

Abstract:

A current collector plate, also called a bipolar plate, for a fuel cell includes two facing metal sheets with fluid channels for the fuel (often hydrogen) on the non-facing side of one sheet and fluid channels for air on the non-facing side of the other sheet. Such a plate is made by applying a patterned coating of particles of a soft and reactive metal to at least one of the sheets and rolling them together so that the soft metal particles deform and interact with the facing sheets to selectively join them at the patterned areas. Pressurized fluid is introduced between the sheets to expand non-bonded portions and define the fluid channels.

US Patent:

7510621, Mar 31, 2009

Filed:

Sep 22, 2004

Appl. No.:

10/946701

Inventors:

David R. Sigler - Shelby Township MI, US
James G. Schroth - Troy MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B32B 37/00
B29C 65/00

US Classification:

1562739, 1563797

Abstract:

Electrically conductive workpieces with facing surfaces are bonded with an adhesive that is filled with conductive metal particles that are reactive with the surfaces of the workpieces. In the bonding process the surfaces are coated with the adhesive, pressed together and an electric current passed between them to momentarily melt the conductive particles. The molten droplets agglomerate and wet the facing surfaces. When the molten clusters re-solidify, electrically conductive paths are formed between the workpieces. For example, the practice is useful for bonding ferrous-based or aluminum-based alloy sheets, strips or plates in making products such as bipolar plates for fuel cells.

US Patent:

7833630, Nov 16, 2010

Filed:

Dec 20, 2004

Appl. No.:

11/017411

Inventors:

David R. Sigler - Shelby Township MI, US
Xiaohong Q. Gayden - West Bloomfield MI, US
Yen-Lung Chen - Troy MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

B32B 15/06

US Classification:

428625, 428621, 428624, 428220, 428332, 428336, 428457, 428462, 428463, 156 735, 219 7801, 219 9121

Abstract:

The present invention is directed to improved weldable metal composites and methods. A metal composite structure () features two metal members () () sandwiching a viscoelastic layer () where the viscoelastic layer entrains electrically conductive particles () and a carbon extracting attractant layers () () to inhibit and/or prevent carbon migration and carbide formation during welding.

US Patent:

7841509, Nov 30, 2010

Filed:

Oct 23, 2007

Appl. No.:

11/876883

Inventors:

David R. Sigler - Shelby Township MI, US
Anil K. Sachdev - Rochester Hills MI, US
James G. Schroth - Troy MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

B23K 31/02
B23K 20/22
B21D 39/00

US Classification:

228225, 228164, 22826261

Abstract:

A copper tube with copper end pieces for a water-cooled secondary winding of a welding transformer is an example of a brazed assembly having a potentially corrodible side, the water-cooled side, and a low-exposure side, the air side or dry side, of the joined pieces. By shaping contacting surfaces of the parts at the brazed joint it is useful to form a barrier, for example, between a special braze material required for the corrosive side and a conventional, easy to apply, braze material for use on the air side of the joint.

Address:

2525 Frst Park Blvd, Fort Worth, TX 76110

VIN:

1FMYU92Z67KA65470

Make:

FORD

Model:

ESCAPE

Year:

2007