Patents by Inventor David L. Walker

David L. Walker has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10865468
    Abstract: In one embodiment, a Metal Injection Molded (MIM) body may have one or more surfaces comprising a zirconium alloy. A method of forming an oxide layer on the zirconium alloy surface(s) of the MIM body may include hot isostatic pressing the MIM body, heat treating the MIM body, machining the MIM body to desired shape dimensions, polishing the surface of the MIM body, and oxidizing the polished surface of the MIM body. In some embodiments, the polishing step may include a first vibratory finishing step; and a second vibratory finishing step.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: December 15, 2020
    Assignee: Avalign Technologies, Inc.
    Inventor: David L. Walker
  • Publication number: 20180125297
    Abstract: A bun toasting assembly for permanently toasting a depression into a bun includes a toaster that may have a plurality of buns positioned therein. The toaster is structured to form a depression in the buns. A heating coil is positioned within the toaster to toast the buns thereby facilitating the depression to be permanently toasted into the buns.
    Type: Application
    Filed: November 10, 2016
    Publication date: May 10, 2018
    Inventors: David L. Walker, Debra J. Walker
  • Publication number: 20160305005
    Abstract: In one embodiment, a Metal Injection Molded (MIM) body may have one or more surfaces comprising a zirconium alloy. A method of forming an oxide layer on the zirconium alloy surface(s) of the MIM body may include hot isostatic pressing the MIM body, heat treating the MIM body, machining the MIM body to desired shape dimensions, polishing the surface of the MIM body, and oxidizing the polished surface of the MIM body. In some embodiments, the polishing step may include a first vibratory finishing step; and a second vibratory finishing step.
    Type: Application
    Filed: June 28, 2016
    Publication date: October 20, 2016
    Inventor: David L. Walker
  • Publication number: 20160113447
    Abstract: A shower rod assembly includes an arcuate rod having a first end and an opposing second end. A first mounting bracket is engageable with the first end and a second mounting bracket is coupleable with the second end. An end connector has a first portion and a second portion. The second portion is engageable with the second mounting bracket and the first portion is insertable into the second end of the arcuate rod. An extent of insertion of the first portion of the end connector into the arcuate rod is adjustable, for adjusting a length of the shower rod assembly.
    Type: Application
    Filed: October 23, 2014
    Publication date: April 28, 2016
    Inventors: David L. WALKER, Robert James WALSH
  • Publication number: 20150107721
    Abstract: Methods of preparing a surface of a cast zirconium alloy substrate for oxidation, the method including hot isostatic pressing a cast substrate of near shape dimensions, heating the cast substrate, machining the cast substrate to desired shape dimensions, and treating the surface of the cast substrate to accept an oxide layer. in some examples, treating the surface of the cast substrate may include polishing the surface, peening the polished surface, and finishing the peened surface. Additional or alternative examples may include heat treating a cast substrate of near shape dimensions to define a homogenized grain structure within the cast substrate, machining the heat treated cast substrate to desired shape dimensions, and surface treating the machined cast substrate to modify its structure to define a recrystallized modified grain structure defining a reduced grain boundary size.
    Type: Application
    Filed: October 23, 2013
    Publication date: April 23, 2015
    Inventor: David L. Walker
  • Publication number: 20150090682
    Abstract: A cover for the base of a shelving system includes a first end and an opposing second end, a generally flat base wall formed at the second end, a first sidewall and an opposing second sidewall, a third sidewall and an opposing fourth sidewall, an internal cavity formed by the base wall and the four sidewalls, and a support wall positioned in the internal cavity. The first and second sidewalls extend generally parallel to each other and upwardly from the base wall at a predetermined acute angle with respect to the base wall. The third and fourth sidewalls extend generally parallel to each other and generally perpendicularly upwardly from the base wall. The support wall includes at least one angled support which extends upwardly from the base wall toward the first end at the same predetermined acute angle as the first and second sidewalls.
    Type: Application
    Filed: September 30, 2013
    Publication date: April 2, 2015
    Applicant: ZENITH PRODUCTS CORPORATION
    Inventors: David L. WALKER, Alex MIKITA
  • Patent number: 8124187
    Abstract: Methods of forming porous coatings on substrates. Methods of forming porous coatings include preparing a binder, applying the binder to a substrate to form a binder layer, applying a coating material to the binder layer to form a coating material layer, and sintering the coated substrate. In some examples, preparing a binder includes mixing together metal particles including titanium hydride or cobalt disilicide, a polymer including polybutene or poly-isobutylene, a brazing agent, and methyl cellulose. In some examples, the coating material includes titanium or cobalt. Applying the binder may include spray coating the binder onto the substrate.
    Type: Grant
    Filed: September 8, 2009
    Date of Patent: February 28, 2012
    Assignee: Viper Technologies
    Inventors: Cheyenne Xiaoyan Su, David L. Walker
  • Publication number: 20110059268
    Abstract: Methods of forming porous coatings on substrates. Methods of forming porous coatings include preparing a binder, applying the binder to a substrate to form a binder layer, applying a coating material to the binder layer to form a coating material layer, and sintering the coated substrate. In some examples, preparing a binder includes mixing together metal particles including titanium hydride or cobalt disilicide, a polymer including polybutene or poly-isobutylene, a brazing agent, and methyl cellulose. In some examples, the coating material includes titanium or cobalt. Applying the binder may include spray coating the binder onto the substrate.
    Type: Application
    Filed: September 8, 2009
    Publication date: March 10, 2011
    Applicant: VIPER TECHNOLOGIES LLC, D.B.A. THORTEX, INC.
    Inventors: Cheyenne Xiaoyan Su, David L. Walker
  • Patent number: 7883662
    Abstract: Metal injection molding methods and feedstocks. Metal injection molding methods include forming a feedstock, molding the feedstock into a molded article, substantially removing a lubricant, a thermoplastic, and an aromatic binder from the molded article, and sintering the molded article into a metal article. In some examples, metal injection molding methods include oxygen reduction methods. In some examples, metal injection molding methods include densification methods. Metal injection molding feedstocks include a lubricant, a thermoplastic, and aromatic binder, and a metal powder.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: February 8, 2011
    Assignee: Viper Technologies
    Inventors: Larry E. LaVoie, James C. Moore, David L. Walker
  • Publication number: 20090129961
    Abstract: Metal injection molding methods and feedstocks. Metal injection molding methods include forming a feedstock, molding the feedstock into a molded article, substantially removing a lubricant, a thermoplastic, and an aromatic binder from the molded article, and sintering the molded article into a metal article. In some examples, metal injection molding methods include oxygen reduction methods. In some examples, metal injection molding methods include densification methods. Metal injection molding feedstocks include a lubricant, a thermoplastic, and aromatic binder, and a metal powder.
    Type: Application
    Filed: November 15, 2007
    Publication date: May 21, 2009
    Applicant: Viper Technologies LLC, d.b.a. Thortex, Inc.
    Inventors: Larry E. LAVOIE, James C. MOORE, David L. WALKER
  • Patent number: D544276
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: June 12, 2007
    Assignee: Zenith Products Corp.
    Inventor: David L. Walker
  • Patent number: D545386
    Type: Grant
    Filed: January 25, 2006
    Date of Patent: June 26, 2007
    Assignee: Bridgestone Sports Co., Ltd.
    Inventors: Vinh-Duy Thai Nguyen, Yasushi Ichikawa, David L. Walker, Hideo Matsunaga
  • Patent number: D560262
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: January 22, 2008
    Assignee: Bridgestone Sports Co., Ltd.
    Inventors: Vinh-Duy Thai Nguyen, David L. Walker, Yasushi Ichikawa
  • Patent number: D568427
    Type: Grant
    Filed: December 1, 2006
    Date of Patent: May 6, 2008
    Assignee: Bridgestone Sports Co., Ltd.
    Inventors: Vinh-Duy Thai Nguyen, David L. Walker, Yasushi Ichikawa
  • Patent number: D641191
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: July 12, 2011
    Assignee: Zenith Products Corp.
    Inventor: David L. Walker
  • Patent number: D666012
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: August 28, 2012
    Assignee: Zenith Products Corporation
    Inventors: David L. Walker, Kaveh Didehvar
  • Patent number: D681423
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: May 7, 2013
    Assignee: Zenith Products Corporation
    Inventors: David L. Walker, Kaveh Didehvar
  • Patent number: D693209
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: November 12, 2013
    Assignee: Zenith Products Corporation
    Inventors: David L. Walker, Kaveh Didehvar
  • Patent number: D714571
    Type: Grant
    Filed: April 7, 2014
    Date of Patent: October 7, 2014
    Assignee: Zenith Products Corporation
    Inventor: David L. Walker
  • Patent number: D914427
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: March 30, 2021
    Inventors: David L. Walker, Debra J. Walker