Patents by Inventor Frederic C. Petersen
Frederic C. Petersen 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: 9908167Abstract: A tolerance ring suitable for use in applications such as an actuator assembly for a disk drive, is disclosed. The tolerance ring may be fabricated by steps including stamping a sheet metal section from a strip of sheet metal that has first and second edges that are parallel to a strip axis. A leading axial edge may be rounded from an inner major face and from an outer major face. A plurality of protrusions may be formed from the first major face. The sheet metal section may be bent into a substantially cylindrical shape having a central axis that is normal to the strip axis.Type: GrantFiled: March 2, 2015Date of Patent: March 6, 2018Assignees: Western Digital Technologies, Inc., Intri-Plex Technologies, Inc.Inventors: Joshua Parker, Frederic C. Petersen, Shawn P. Couture, Prabheesh Balakrishnan Kuniyil, Bob A. Nykanen
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Patent number: 9536571Abstract: A disk clamp for clamping a plurality of disks within a disk drive has a single fastening hole located at its symmetrical center sized to pass the shaft of a screw having a head diameter larger than the fastening hole. The screw fastens the disk clamp to a motor hub supporting the plurality of disks. The disk clamp has a moat around the fastening hole, at a maximum diameter that is smaller than the head diameter of the head on the fastening screw. The moat may be circular, have spike trenches angled toward the fastening hole, or be spiral. The diameter of the spiral moat decreases in a clockwise or counterclockwise direction toward the fastening hole. The midsection of the disk which the screw head covers is biased at a negative angle toward the fastening hole forcing particles generated during assembly toward the fastening hole of the disk clamp.Type: GrantFiled: May 4, 2016Date of Patent: January 3, 2017Assignee: INTRI-PLEX TECHNOLOGIES, INC.Inventors: Adam D. Sutton, David M. Erlach, Frederic C. Petersen, Ryan J. Schmidt, Paul W. Smith, Robert J. Tench
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Publication number: 20160354830Abstract: A novel method, for fabricating a tolerance ring suitable for use in applications such as an actuator assembly for a disk drive, is disclosed. The tolerance ring may be fabricated by steps including stamping a sheet metal section from a strip of sheet metal that has first and second edges that are parallel to a strip axis. A leading axial edge may be rounded from an inner major face and from an outer major face. A plurality of protrusions may be formed from the first major face. The sheet metal section may be bent into a substantially cylindrical shape having a central axis that is normal to the strip axis.Type: ApplicationFiled: August 16, 2016Publication date: December 8, 2016Inventors: Joshua Parker, Frederic C. Petersen, Shawn P. Couture, Prabheesh Balakrishnan Kuniyil, Bob A. Nykanen
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Publication number: 20160247546Abstract: A disk clamp for clamping a plurality of disks within a disk drive has a single fastening hole located at its symmetrical center sized to pass the shaft of a screw having a head diameter larger than the fastening hole. The screw fastens the disk clamp to a motor hub supporting the plurality of disks. The disk clamp has a moat around the fastening hole, at a maximum diameter that is smaller than the head diameter of the head on the fastening screw. The moat may be circular, have spike trenches angled toward the fastening hole, or be spiral. The diameter of the spiral moat decreases in a clockwise or counterclockwise direction toward the fastening hole. The midsection of the disk which the screw head covers is biased at a negative angle toward the fastening hole forcing particles generated during assembly toward the fastening hole of the disk clamp.Type: ApplicationFiled: May 4, 2016Publication date: August 25, 2016Inventors: Adam D. Sutton, David M. Erlach, Frederic C. Petersen, Ryan J. Schmidt, Paul W. Smith, Robert J. Tench
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Patent number: 9361929Abstract: A disk clamp for clamping a plurality of disks within a disk drive has a single fastening hole located at its symmetrical center sized to pass the shaft of a screw having a head diameter larger than the fastening hole. The screw fastens the disk clamp to a motor hub supporting the plurality of disks. The disk clamp has a moat around the fastening hole, at a maximum diameter that is smaller than the head diameter of the head on the fastening screw. The moat may be circular, have spike trenches angled toward the fastening hole, or be spiral. The diameter of the spiral moat decreases in a clockwise or counterclockwise direction toward the fastening hole. The midsection of the disk which the screw head covers is biased at a negative angle toward the fastening hole forcing particles generated during assembly toward the fastening hole of the disk clamp.Type: GrantFiled: January 27, 2014Date of Patent: June 7, 2016Assignee: INTRI-PLEX TECHNOLOGIES, INC.Inventors: David M. Erlach, Frederic C. Petersen, Ryan J. Schmidt, Paul W. Smith, Adam D. Sutton, Robert J. Tench
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Patent number: 8824099Abstract: A disk clamp for clamping a number of magnetic hard disks within a disk drive has a plurality of balance weight holes and a coined index mark for use as a reference in balancing the hard disks after assembly. The disk clamp also has a coined profile located adjacent or around the balance weight holes in order to provide uniform circumferential clamp force by the disk clamp. The disk clamp has a profile that places the inner region of the disk clamp in the plastic deformation region at a certain specified clamping force at the center of the disk clamp.Type: GrantFiled: April 12, 2012Date of Patent: September 2, 2014Assignee: Intri-Plex Technologies, Inc.Inventors: Frederic C. Petersen, Ryan J. Schmidt, Paul W. Smith, Adam D. Sutton
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Publication number: 20140139950Abstract: A disk clamp for clamping a plurality of disks within a disk drive has a single fastening hole located at its symmetrical center sized to pass the shaft of a screw having a head diameter larger than the fastening hole. The screw fastens the disk clamp to a motor hub supporting the plurality of disks. The disk clamp has a moat around the fastening hole, at a maximum diameter that is smaller than the head diameter of the head on the fastening screw. The moat may be circular, have spike trenches angled toward the fastening hole, or be spiral. The diameter of the spiral moat decreases in a clockwise or counterclockwise direction toward the fastening hole. The midsection of the disk which the screw head covers is biased at a negative angle toward the fastening hole forcing particles generated during assembly toward the fastening hole of the disk clamp.Type: ApplicationFiled: January 27, 2014Publication date: May 22, 2014Applicant: Intri-Plex Technologies, Inc.Inventors: David M. Erlach, Frederic C. Petersen, Ryan J. Schmidt, Paul W. Smith, Adam D. Sutton, Robert J. Tench
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Patent number: 8675306Abstract: A disk clamp for clamping a plurality of disks within a disk drive has a single fastening hole located at its symmetrical center sized to pass the shaft of a screw having a head diameter larger than the fastening hole. The screw fastens the disk clamp to a motor hub supporting the plurality of disks. The disk clamp has a moat around the fastening hole, at a maximum diameter that is smaller than the head diameter of the head on the fastening screw. The moat may be circular, have spike trenches angled toward the fastening hole, or be spiral. The diameter of the spiral moat decreases in a clockwise or counterclockwise direction toward the fastening hole. The midsection of the disk which the screw head covers is biased at a negative angle toward the fastening hole forcing particles generated during assembly toward the fastening hole of the disk clamp.Type: GrantFiled: April 12, 2012Date of Patent: March 18, 2014Assignee: Intri-Plex Technologies, Inc.Inventors: Adam D. Sutton, David M. Erlach, Frederic C. Petersen, Ryan J. Schmidt, Paul W. Smith, Robert J. Tench
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Publication number: 20130272108Abstract: A disk clamp for clamping a number of magnetic hard disks within a disk drive has a plurality of balance weight holes and a coined index mark for use as a reference in balancing the hard disks after assembly. The disk clamp also has a coined profile located adjacent or around the balance weight holes in order to provide uniform circumferential clamp force by the disk clamp. The disk clamp has a profile that places the inner region of the disk clamp in the plastic deformation region at a certain specified clamping force at the center of the disk clamp.Type: ApplicationFiled: April 12, 2012Publication date: October 17, 2013Applicant: Intri-Plex Technologies, Inc.Inventors: Frederic C. Petersen, Ryan J. Schmidt, Paul W. Smith, Adam D. Sutton
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Publication number: 20130272107Abstract: A disk clamp for clamping a plurality of disks within a disk drive has a single fastening hole located at its symmetrical center sized to pass the shaft of a screw having a head diameter larger than the fastening hole. The screw fastens the disk clamp to a motor hub supporting the plurality of disks. The disk clamp has a moat around the fastening hole, at a maximum diameter that is smaller than the head diameter of the head on the fastening screw. The moat may be circular, have spike trenches angled toward the fastening hole, or be spiral. The diameter of the spiral moat decreases in a clockwise or counterclockwise direction toward the fastening hole. The midsection of the disk which the screw head covers is biased at a negative angle toward the fastening hole forcing particles generated during assembly toward the fastening hole of the disk clamp.Type: ApplicationFiled: April 12, 2012Publication date: October 17, 2013Applicant: Intri-Plex Technologies, Inc.Inventors: David M. Erlach, Frederic C. Petersen, Ryan J. Schmidt, Paul W. Smith, Adam D. Sutton, Robert J. Tench