James D Ault

US Patent:

20030150294, Aug 14, 2003

Filed:

Jan 25, 2002

Appl. No.:

10/057612

Inventors:

Njall Stefansson - Portland OR, US
Mark Springgate - Portland OR, US
James Barrett - Milwaukie OR, US
David Sturgis - Boring OR, US
James Ault - Portland OR, US
Patrick Durbin - Portland OR, US
Douglas Nikolas - Battleground WA, US

International Classification:

C21C007/00

US Classification:

075/407000

Abstract:

A molten metal or molten metal alloy is filtered to remove contaminants. Filters may include imaging agents, especially those useful for N-ray radiography, X-ray analysis, and neutron activation. Currently preferred imaging agents include gadolinia and tungsten. Currently preferred refractory materials include yttria, zirconia, tantalum, tungsten and rhenium. A homogeneous distribution of refractory and imaging materials may be accomplished by vacuum impregnation, chemical vapor deposition, physical vapor deposition, chemical vapor infiltration, fusing, cocalcining, alloying, and physical mixing. Filters substantially resistant to chemical and mechanical degradation may be used. For example, filters may be constructed with at least an outer layer of the filter comprising yttria. Filters may define a porosity and mesh size for efficient filtration and to exclude the maximum allowed size of defects for the particular application. Castings may be analyzed for inclusions by X-ray analysis, neutron activation, and N-ray radiography. Preferred methods for filtering melts include providing a filter including an imaging agent and filtering the melt into a mold to cast a metal article. Filtration may include heating the filter during filtration. The melt may include any molten metal or metal alloy, particularly aluminum, steel, alloys of titanium, chromium, nickel, cobalt and alloys thereof.

US Patent:

20140010706, Jan 9, 2014

Filed:

Mar 15, 2013

Appl. No.:

13/834501

Inventors:

John Schleicher - Aloha OR, US
James Ault - Vancouver WA, US
David Pickett - Portland OR, US

Assignee:

PCC Structurals, Inc. - Portland OR

International Classification:

B22D 29/00
C22F 1/00
B24C 1/00

US Classification:

420591, 164 761, 164 691, 148559

Abstract:

A method of processing a casting is described. The method comprises removing a mold from a cast metal part without cold working surfaces of the cast metal part and thermally treating the cast metal part. The method can further comprise finishing the surfaces of the cast metal part after thermally treating such that any cold working of the surfaces of the cast metal part occurs after thermally treating such that no recast layer is formed in the cast metal part.

US Patent:

44542054, Jun 12, 1984

Filed:

Oct 9, 1981

Appl. No.:

6/310226

Inventors:

Ronald R. Miller - Beaverton OR
William R. Barber - Portland OR
David A. Hampel - Vancouver WA
James E. Ault - Portland OR

Assignee:

ESCO Corporation - Portland OR

International Classification:

B22F 708

US Classification:

428556

Abstract:

A method for making a drill bit and product resulting therefrom in which carbide elements are coated with carbide and nitride materials such as those of titanium as by chemical vapor deposition after which the elements are cast in molten steel.

US Patent:

20160030632, Feb 4, 2016

Filed:

Mar 5, 2013

Appl. No.:

14/771877

Inventors:

- Portland OR, US
James K. Barrett - Milwaukie OR, US
James Ault - Portland OR, US

International Classification:

A61L 27/30
A61L 27/04
A61F 2/00
B32B 15/01
C23C 4/08
C23C 4/18

Abstract:

Described is a medical implant having a CoCr cast body and a commercially pure (CP) Ti coating. The CP Ti coating is diffusion bonded to the CoCr body and is 5-3000 μm thick. Also described is a process for producing the medical implant that includes preparing the cast CoCr body for coating, applying a coating using a cold spray process, and diffusion bonding the coating to the body using hot isostatic pressing.