Patents by Inventor Alfred J. Chiesa
Alfred J. Chiesa 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).
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Patent number: 11060595Abstract: A differential assembly includes one or more NVH-modifying elements that alter and/or reduce at least one of a noise, vibration, and harshness emitted from the differential assembly. The NVH-modifying element(s) are placed in engagement with the side gears of the differential assembly to modify and/or reduce the NVH of the differential assembly.Type: GrantFiled: January 4, 2018Date of Patent: July 13, 2021Assignee: GKN Sinter Metals, LLCInventors: Virgiliu-Adrian Savu, Alfred J. Chiesa, Timothy E. Geiman
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Publication number: 20190346033Abstract: A differential assembly includes one or more NVH-modifying elements that alter and/or reduce at least one of a noise, vibration, and harshness emitted from the differential assembly. The NVH-modifying element(s) are placed in engagement with the side gears of the differential assembly to modify and/or reduce the NVH of the differential assembly.Type: ApplicationFiled: January 4, 2018Publication date: November 14, 2019Inventors: Virgiliu-Adrian Savu, Alfred J. Chiesa, Timothy E. Geiman
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Patent number: 9248503Abstract: A method of forming a powder metal forging, which includes the steps of providing a preform including a sintered powder metal composition; inserting the preform in at least one part of a die set having a top die and a bottom die, at least one of the top die and the bottom die defining a helical forge form therewithin; closing the die set wherein the top die is contacting the bottom die; and compressing the preform in the forge form using an upper punch including a core rod and a lower punch, the compressing step occurring after the closing step, the compressing step resulting in a formed part having a helical outer surface. The method and apparatus of the present invention is particularly advantageous when forming a powder metal forging helical outer surface and an inner contour such as a cylindrical inside diameter.Type: GrantFiled: April 1, 2008Date of Patent: February 2, 2016Assignee: GKN Sinter Metals, LLCInventors: Alfred J. Chiesa, Hank J. Knott, David E. Lenhart
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Patent number: 8806912Abstract: A method and apparatus for forming a powder metal forging (B) includes a die set (A1D) for forming the powder metal forging (B) having a first die (A) complementary with a second die (D) in a longitudinal direction (ZC). The die set (A,D) has at least two features (10) of dimensions with a longitudinal component (10) and a lateral component (18), and at least the lateral component (18) varies along the longitudinal direction (ZC), at least one such feature (10) in each die (A,D). Each of the first die (A) and the second die (D) includes a castellated parting interface (12,13) dissecting the laterally varying internal longitudinal feature (10, 18) in the first die from the laterally varying feature (10, 18) in the second die (D). The castellation (12,13) in the dies (A,D) provides forged powder metal parts (B) with features of opposite drafts without trapping the part (B) in the dies (A,D).Type: GrantFiled: December 12, 2007Date of Patent: August 19, 2014Assignee: GKN Sinter Metals, LLCInventors: Alfred J. Chiesa, Hank J. Knott, David E. Lenhart, Jr., Branko Cvetkovic
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Patent number: 8776975Abstract: A one-way clutch with an outer race and an inner race is disclosed. One of the races includes at least one pawl and an engagement member for holding the at least one pawl in engagement with ratchet teeth on the other race. The contact surface of the at least one pawl or the ratchet teeth is an arcuate shape for improved load distribution. The arcuate contact surface has a radius of curvature that is greater than a radius of curvature at corners adjacent to the arcuate contact surface.Type: GrantFiled: October 22, 2008Date of Patent: July 15, 2014Assignee: GKN Sinter Metals, LLCInventors: Alfred J. Chiesa, Henry J. Knott
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Patent number: 8613352Abstract: A retainer for a one-way clutch is provided. In some embodiments, the retainer includes an annular portion with an inner circumferential surface, an outer circumferential surface and a first axial surface disposed between the inner circumferential surface and the outer circumferential surface. The first axial surface has a plurality of grooves, a second axial surface is disposed between the inner circumferential surface and the outer circumferential surface, and the second axial surface is configured to engage an outer race of the one-way clutch assembly. The retainer also includes a plurality of inner lobes that project generally radially inwardly from the inner circumferential surface, and are configured to engage an inner race of the one-way clutch assembly.Type: GrantFiled: July 9, 2009Date of Patent: December 24, 2013Assignee: GKN Sinter Metals, LLCInventors: Virgiliu-Adrian Savu, Damien J. Fron, Alfred J. Chiesa
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Patent number: 8517884Abstract: A differential assembly, bevel gears for the assembly, and a method of making the bevel gears are disclosed. The bevel gears have a form which provides for high power density transfer.Type: GrantFiled: November 1, 2010Date of Patent: August 27, 2013Assignee: GKN Sinter Metals, LLCInventors: Timothy E. Geiman, Alfred J. Chiesa, Henry J. Knott, David E. Lenhart
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Patent number: 8309019Abstract: A method of forming a powder metal forging, including the steps of: forming a preform including a sintered powder metal composition; inserting the preform in a die set having a bottom die and a top die, the die set defining a forge form therewithin, the die set being in a closed position wherein the top die is contacting the bottom die; and compressing the preform in the forge form using an upper punch and a lower punch, the compressing step resulting in a formed part. The closed die set minimizes or eliminates flash in the formed part, particularly in the contoured surfaces, which allows the forging to be through hardened by direct quenching after the forging operation, without the need to remove hardened flash from these surfaces.Type: GrantFiled: February 8, 2008Date of Patent: November 13, 2012Assignee: GKN Sinter Metals, LLCInventors: Alfred J. Chiesa, David E. Lenhart, Jr.
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Patent number: 8033372Abstract: An overrunning clutch has a first race, a second race, a set of pawls between the first race and the second race and a set of springs between the first race and the second race, one spring for each pawl and each corresponding spring biasing the corresponding pawl into a position in which the first race and the second race are engaged with each other in a driving direction and are disengaged from each other in a free wheeling direction. Each spring is received in a spring receiving recess of one of the races and biases a rearward portion of the corresponding pawl radially inwardly into a pawl receiving recess of the race.Type: GrantFiled: August 31, 2006Date of Patent: October 11, 2011Assignee: GKN Sinter Metals, LLCInventors: Alfred J. Chiesa, Damien J. Fron
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Publication number: 20110108383Abstract: A retainer for a one-way clutch is provided. In some embodiments, the retainer includes an annular portion with an inner circumferential surface, an outer circumferential surface and a first axial surface disposed between the inner circumferential surface and the outer circumferential surface. The first axial surface has a plurality of grooves, a second axial surface is disposed between the inner circumferential surface and the outer circumferential surface, and the second axial surface is configured to engage an outer race of the one-way clutch assembly. The retainer also includes a plurality of inner lobes that project generally radially inwardly from the inner circumferential surface, and are configured to engage an inner race of the one-way clutch assembly.Type: ApplicationFiled: July 9, 2009Publication date: May 12, 2011Inventors: Virgiliu-Adrian Savu, Damien J. Fron, Alfred J. Chiesa
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Publication number: 20110059822Abstract: A differential assembly, bevel gears for the assembly, and a method of making the bevel gears are disclosed. The bevel gears have a form which provides for high power density transfer.Type: ApplicationFiled: November 1, 2010Publication date: March 10, 2011Inventors: Timothy E. Geiman, Alfred J. Chiesa, Henry J. Knott, David E. Lenhart
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Publication number: 20110000335Abstract: A method and apparatus for forming a powder metal forging (B) includes a die set (A1D) for forming the powder metal forging (B) having a first die (A) complementary with a second die (D) in a longitudinal direction (ZC). The die set (A,D) has at least two features (10) of dimensions with a longitudinal component (10) and a lateral component (18), and at least the lateral component (18) varies along the longitudinal direction (ZC), at least one such feature (10) in each die (A,D). Each of the first die (A) and the second die (D) includes a castellated parting interface (12,13) dissecting the laterally varying internal longitudinal feature (10, 18) in the first die from the laterally varying feature (10, 18) in the second die (D). The castellation (12,13) in the dies (A,D) provides forged powder metal parts (B) with features of opposite drafts without trapping the part (B) in the dies (A,D).Type: ApplicationFiled: December 12, 2007Publication date: January 6, 2011Inventors: Alfred J. Chiesa, Hank J. Knott, David E. Lenhart, JR., Branko Cvetkovic
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Publication number: 20100288593Abstract: A one-way clutch with an outer race and an inner race is disclosed. One of the races includes at least one pawl and an engagement member for holding the at least one pawl in engagement with ratchet teeth on the other race. The contact surface of the at least one pawl or the ratchet teeth is an arcuate shape for improved load distribution. The arcuate contact surface has a radius of curvature that is greater than a radius of curvature at corners adjacent to the arcuate contact surface.Type: ApplicationFiled: October 22, 2008Publication date: November 18, 2010Inventors: Alfred J. Chiesa, Henry J. Knott
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Publication number: 20100035077Abstract: A method of forming a powder metal forging, including the steps of: forming a preform including a sintered powder metal composition; inserting the preform in a die set having a bottom die and a top die, the die set defining a forge form therewithin, the die set being in a closed position wherein the top die is contacting the bottom die; and compressing the preform in the forge form using an upper punch and a lower punch, the compressing step resulting in a formed part. The closed die set minimizes or eliminates flash in the formed part, particularly in the contoured surfaces, which allows the forging to be through hardened by direct quenching after the forging operation, without the need to remove hardened flash from these surfaces.Type: ApplicationFiled: February 8, 2008Publication date: February 11, 2010Inventors: Alfred J. Chiesa, David E. Lenhart, JR.
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Publication number: 20090145718Abstract: An overrunning clutch has a first race, a second race, a set of pawls between the first race and the second race and a set of springs between the first race and the second race, one spring for each pawl and each corresponding spring biasing the corresponding pawl into a position in which the first race and the second race are engaged with each other in a driving direction and are disengaged from each other in a free wheeling direction. Each spring is received in a spring receiving recess of one of the races and biases a rearward portion of the corresponding pawl radially inwardly into a pawl receiving recess of the race.Type: ApplicationFiled: August 31, 2006Publication date: June 11, 2009Inventors: Alfred J. Chiesa, Damien J. Fron
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Patent number: 6997295Abstract: A freewheeling clutch includes torque transmitting elements disposed between an inner race and an outer race. The elements include active surfaces that may be defined by an angularly variable radius of curvature that varies with respect to roll angle at an increasing rate, such as an equiangular spiral, to form a constant strut angle as the elements move between a freewheeling and an engaged position.Type: GrantFiled: July 3, 2002Date of Patent: February 14, 2006Inventors: Jack E. Pederson, Duane A. Bacon, Alfred J. Chiesa
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Publication number: 20040003976Abstract: A freewheeling clutch includes torque transmitting elements disposed between an inner race and an outer race. The elements include active surfaces that may be defined by an angularly variable radius of curvature that varies with respect to roll angle at an increasing rate, such as an equiangular spiral, to form a constant strut angle as the elements move between a freewheeling and an engaged position.Type: ApplicationFiled: July 3, 2002Publication date: January 8, 2004Inventors: Jack E. Pederson, Duane A. Bacon, Alfred J. Chiesa