Patents Assigned to Meadville Forging Co LP
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Patent number: 10086455Abstract: 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: GrantFiled: November 10, 2015Date of Patent: October 2, 2018Assignee: Meadville Forging Co. LPInventors: Kenneth P. Griffard, Carl P. McLean, Michael Rhoades
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Publication number: 20160059335Abstract: 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: ApplicationFiled: November 10, 2015Publication date: March 3, 2016Applicant: Meadville Forging Co. LPInventors: Kenneth P. Griffard, Carl P. McLean, Michael Rhoades
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Patent number: 9272348Abstract: 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: GrantFiled: June 27, 2013Date of Patent: March 1, 2016Assignee: Meadville Forging Co LPInventors: Kenneth P. Griffard, Carl P. McLean, Michael Rhoades
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Publication number: 20150003936Abstract: 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: ApplicationFiled: June 27, 2013Publication date: January 1, 2015Applicant: MEADVILLE FORGING CO. LPInventors: Kenneth P. Griffard, Carl P. McLean, Michael Rhoades
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Patent number: 7895873Abstract: In a method or system for simultaneously forging parts, a forging die is provided with a bottom part and a top part, the forging die having a first forging cavity, a second forging cavity surrounding the first forging cavity, and a connecting opening between the first forging cavity and the second forging cavity. A billet is placed in a lower portion of at least one of the first forging cavity, the second forging cavity, and the connecting opening, and then with a forging press, the forging die is closed so that the die bottom part and die upper part approach one another to cause material of the billet to spread throughout the first forging cavity, the connecting opening, and the second forging cavity. The forging die is opened and a resulting unified forging part is removed formed of a first forging part, a second forging part, and a connecting region. The first forging part and the second forging part are separated at the connecting region.Type: GrantFiled: April 23, 2008Date of Patent: March 1, 2011Assignee: Meadville Forging Co LPInventor: Carl McLean