Patents by Inventor Kenneth P. Griffard

Kenneth P. Griffard 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).

  • Bolt hole with improved threads and tap for manufacture thereof
    Patent number: 10086455
    Abstract: In a part having a surface, a bolt hole is provided extending into the part from the surface. Threads in the hole have crests with a fishmouth shape at the crests defined by a central concave portion and raised corner portions at ends of the concave portion. At least one start thread preceding the threads with the fishmouth shape crests is provided having a substantially flat crest without the fishmouth shape. A tap for manufacturing the threaded bolt hole has a first thread section and a second thread section. The second thread section has a plurality of threads for creating at least one improved start thread in the hole to be threaded, minor diameters at valleys between the threads of the second thread section being greater than minor diameters at valleys between threads of the first thread section or major diameters at crests of the threads of the second thread section being greater than major diameters at crests of the first thread section.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: October 2, 2018
    Assignee: Meadville Forging Co. LP
    Inventors: Kenneth P. Griffard, Carl P. McLean, Michael Rhoades
  • BOLT HOLE WITH IMPROVED THREADS AND TAP FOR MANUFACTURE THEREOF
    Publication number: 20160059335
    Abstract: In a part having a surface, a bolt hole is provided extending into the part from the surface. Threads in the hole have crests with a fishmouth shape at the crests defined by a central concave portion and raised corner portions at ends of the concave portion. At least one start thread preceding the threads with the fishmouth shape crests is provided having a substantially flat crest without the fishmouth shape. A tap for manufacturing the threaded bolt hole has a first thread section and a second thread section. The second thread section has a plurality of threads for creating at least one improved start thread in the hole to be threaded, minor diameters at valleys between the threads of the second thread section being greater than minor diameters at valleys between threads of the first thread section or major diameters at crests of the threads of the second thread section being greater than major diameters at crests of the first thread section.
    Type: Application
    Filed: November 10, 2015
    Publication date: March 3, 2016
    Applicant: Meadville Forging Co. LP
    Inventors: Kenneth P. Griffard, Carl P. McLean, Michael Rhoades
  • Bolt hole with improved threads and tap for manufacture thereof
    Patent number: 9272348
    Abstract: In a part having a surface, a bolt hole is provided extending into the part from the surface. Threads in the hole have crests with a fishmouth shape at the crests defined by a central concave portion and raised corner portions at ends of the concave portion. At least one start thread preceding the threads with the fishmouth shape crests is provided having a substantially flat crest without the fishmouth shape. A tap for manufacturing the threaded bolt hole has a first thread section and a second thread section. The second thread section has a plurality of threads for creating at least one improved start thread in the hole to be threaded, minor diameters at valleys between the threads of the second thread section being greater than minor diameters at valleys between threads of the first thread section or major diameters at crests of the threads of the second thread section being greater than major diameters at crests of the first thread section.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: March 1, 2016
    Assignee: Meadville Forging Co LP
    Inventors: Kenneth P. Griffard, Carl P. McLean, Michael Rhoades
  • BOLT HOLE WITH IMPROVED THREADS AND TAP FOR MANUFACTURE THEREOF
    Publication number: 20150003936
    Abstract: In a part having a surface, a bolt hole is provided extending into the part from the surface. Threads in the hole have crests with a fishmouth shape at the crests defined by a central concave portion and raised corner portions at ends of the concave portion. At least one start thread preceding the threads with the fishmouth shape crests is provided having a substantially flat crest without the fishmouth shape. A tap for manufacturing the threaded bolt hole has a first thread section and a second thread section. The second thread section has a plurality of threads for creating at least one improved start thread in the hole to be threaded, minor diameters at valleys between the threads of the second thread section being greater than minor diameters at valleys between threads of the first thread section or major diameters at crests of the threads of the second thread section being greater than major diameters at crests of the first thread section.
    Type: Application
    Filed: June 27, 2013
    Publication date: January 1, 2015
    Applicant: MEADVILLE FORGING CO. LP
    Inventors: Kenneth P. Griffard, Carl P. McLean, Michael Rhoades