David Jay Landon

US Patent:

20170334009, Nov 23, 2017

Filed:

Nov 6, 2015

Appl. No.:

15/525021

Inventors:

- Pella IA, US
David LANDON - Pella IA, US
Bjorn JOHNSON - Altoona IA, US

International Classification:

B23K 9/04
B23K 35/30
B23K 9/173

Abstract:

One aspect of the disclosure provides an iron-based hardfacing layer which includes hard or wear resistant phases resulting at least in part from dissolution of silicon and/or boron carbide particles into a liquid iron-based metal during the fabrication process. In an embodiment, the hardfacing layer is formed by a fusion welding process in which carbide particles are added to the molten weld pool. In an example, the filler metal supplied to the welding process is a mild steel. In an embodiment, the hardness as measured at the surface of the hardfacing ranges from 40 to 65 HRC. In an example, the iron-based hardfacing layer also includes tungsten carbide particles.

US Patent:

20160318282, Nov 3, 2016

Filed:

Apr 29, 2016

Appl. No.:

15/142231

Inventors:

- Pella IA, US
David LANDON - Pella IA, US

International Classification:

B32B 15/01
B23K 9/04

Abstract:

Embodiments of hardfacing layers in which wear resistant particles are substantially uniformly distributed in a matrix material are provided. The composition and microstructure of the matrix material and the amount, size and distribution of the wear resistant particles can be such that the hardfacing is wear resistant but still retains some toughness. The matrix material may include two components, a first component including iron, chromium and nickel and a second component including chromium and a substantial amount of carbon. The combination of the two components provides hardness and toughness to the matrix material. In embodiments of the disclosure, the wear resistant particles include tungsten. A hardfaced article, in one embodiment, may be formed by fusion welding an austenitic stainless steel filler metal to the surface of a base metal, thereby generating a weld pool; and adding a plurality of particles including tungsten carbide to the weld pool.

US Patent:

20160288239, Oct 6, 2016

Filed:

Mar 31, 2016

Appl. No.:

15/087844

Inventors:

- Pella IA, US
Michael J. PROFFITT - Knoxville IA, US
Clint A. WEINBERG - Pella IA, US
Wanti MUCHTAR - Pella IA, US
David LANDON - Pella IA, US
Bjorn JOHNSON - Altoona IA, US

Assignee:

VERMEER MANUFACTURING COMPANY - Pella IA

International Classification:

B23K 9/32
B23K 9/04

Abstract:

Arc welding systems, apparatus and methods are for hardfacing are provided, including particle feeding apparatus. In one aspect the workpiece is moved in an oscillatory fashion while keeping the welding torch and the particulate delivery system stationary during at least a portion of welding pass. The welding torch and particulate delivery system may also be moved in a non-oscillatory fashion. Process speeds of about 18-30 in/min can be obtained with carbide incorporation of greater than 30% and uniform distribution.

US Patent:

20150266124, Sep 24, 2015

Filed:

May 29, 2015

Appl. No.:

14/725302

Inventors:

- Pella IA, US
Michael J. PROFFITT - Knoxville IA, US
Clint A. WEINBERG - Pella IA, US
Wanti MUCHTAR - Pella IA, US
David LANDON - Pella IA, US
Bjorn JOHNSON - Altoona IA, US

International Classification:

B23K 9/04
B23K 9/32

Abstract:

Arc welding systems, apparatus and methods are for hardfacing are provided, including particle feeding apparatus. In one aspect the workpiece is moved in an oscillatory fashion while keeping the welding torch and the particulate delivery system stationary during at least a portion of welding pass. The welding torch and particulate delivery system may also be moved in a non-oscillatory fashion. Process speeds of about 18-30 in/min can be obtained with carbide incorporation of greater than 30% and uniform distribution.

US Patent:

20150151303, Jun 4, 2015

Filed:

Feb 6, 2015

Appl. No.:

14/616489

Inventors:

- Pella IA, US
Lucas Graham - New Sharon IA, US
Wanti Muchtar - Pella IA, US
David Landon - Pella IA, US
Bjorn Johnson - Altoona IA, US
Phil Egging - Reasnor IA, US
Tyler Schiferl - Pella IA, US
Luke Mushitz - Yankton SD, US

International Classification:

B02C 13/28
A01F 29/00
B02C 13/288

Abstract:

In one embodiment, a bale processor includes a hopper for receiving baled material, a discharge opening for outputting chopped material, and primary and secondary rotors. The primary rotor has an axis of rotation and a rotatable flail to chop the material from the bale received in the hopper. The secondary rotor is rotatable to chop the material after being chopped by the primary rotor, and the secondary rotor is offset from the primary rotor such that the primary rotor is between the secondary rotor and the discharge opening. The flail includes a pivot tube for rotating about the axis, first and second hammers secured to the pivot tube, and a paddle. The paddle is positioned between and secured to the first and second hammers to generate airflow when the first and second hammers are rotated at an operating speed, thereby increasing a throw distance of the chopped material.