David P Denboer

US Patent:

7368079, May 6, 2008

Filed:

Dec 9, 2003

Appl. No.:

10/731710

Inventors:

Xian Yao - Sandy UT, US
David DenBoer - Pleasant Grove UT, US
Scott Horman - Lindon UT, US

Assignee:

Smith International, Inc. - Houston TX

International Classification:

B22F 7/00

US Classification:

419 6, 51293, 51307, 51309, 175374, 175432, 428551, 428552

Abstract:

A method for forming an ultra hard material layer is provided. The method includes disposing a metallic liner inside the periphery of a refractory metal enclosure, introducing ultra hard material feed stock into the enclosure, and sintering using HPHT processing and cooling to form the ultra hard material layer, substantially free of peripheral cracking, chipping and fracturing.

US Patent:

20060239850, Oct 26, 2006

Filed:

Mar 30, 2006

Appl. No.:

11/395969

Inventors:

David DenBoer - Pleasant Grove UT, US
Matt Collier - Draper UT, US

International Classification:

B22F 3/105

US Classification:

419001000, 407054000

Abstract:

An endmill having a body formed from a single piece of material and having length greater than 1.6 inches and a method for forming such an endmill are provided. The method includes sintering a blank with an ultra hard material while in a heater having a length of at least 1.6 inches.

US Patent:

20080131304, Jun 5, 2008

Filed:

Dec 4, 2007

Appl. No.:

11/999324

Inventors:

David DenBoer - Pleasant Grove UT, US
Matt Collier - Draper UT, US

International Classification:

B22F 3/14

US Classification:

419 10

Abstract:

An endmill having a body formed from a single piece of material and having a length greater than 1.6 inches and a method for forming such an endmill are provided. The method includes sintering a blank with an ultra hard material while in a heater having a length of at least 1.6 inches.

US Patent:

61205702, Sep 19, 2000

Filed:

Mar 13, 1998

Appl. No.:

9/042159

Inventors:

Scott M. Packer - Pleasant Grove UT
Peter Littecke - Huddinge, SE
David P. Denboer - Pleasant Grove UT

Assignee:

Smith International - Houston TX
Sandvik Atibolag - Danvik

International Classification:

B24D 304

US Classification:

51309

Abstract:

According to the present invention there is provided a method of making a cutting insert with a hole for clamping to a tool holder wherein a super-hard abrasive material is sintered and simultaneously bonded to a sintered cemented carbide body with a hole inside a container under elevated pressure and temperature conditions. During sintering the hole is filled with a plug which after sintering is removed.

US Patent:

20180216411, Aug 2, 2018

Filed:

Jul 20, 2016

Appl. No.:

15/745719

Inventors:

- Houston TX, US
Yi Fang - Orem UT, US
Michael David France - Lehi UT, US
David P. DenBoer - Pleasant Grove UT, US
Haibo Zhang - Lindon UT, US

International Classification:

E21B 10/573
E21B 10/567
C04B 35/528
C04B 35/645
C04B 35/63
C04B 37/02
C22C 26/00
C22C 29/08
B22F 7/08

Abstract:

Cutting elements include a diamond-bonded body attached with a substrate. The substrate has a coercivity of greater than about 200 Oe, and has a magnetic saturation of from about 73 to 90. The diamond-bonded body has a compressive stress at the surface of greater than about 0.9 GPa after heat treatment, and greater than about 1.2 GPa prior to heat treatment.