Patents by Inventor Matthew Sprankle

Matthew Sprankle 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).

  • Tolerance ring with high axial static friction
    Publication number: 20060275076
    Abstract: A tolerance ring for applications requiring high axial static friction has contacting portions having a novel profile. The use of multiple contacting portions having a smaller size that are wedge-shaped increases rigidity and provides a directional grip that increases axial static function. Using multiple wdege-shaped contacting portions with appropriate opposite slants provides a balanced and symmetrical grip. Using inter-level wedge-shaped contacting portions with opposite slants provides a more aggressive grip while providing a tolerance ring that is more dynamically stable and has a high resonant frequency.
    Type: Application
    Filed: June 1, 2005
    Publication date: December 7, 2006
    Inventors: Kevin Hanrahan, David Dexter, Ryan Schmidt, Matthew Sprankle
  • Tolerance ring with debris-reducing profile
    Publication number: 20060181811
    Abstract: A tolerance ring for applications requiring cleanliness has contacting portions having a novel profile that reduces debris generation during installation of the tolerance ring while still providing adequate stiffness after installation. The tolerance ring is suitable for cylindrical interface applications where both a reduction in debris generation and high interface stiffness are desirable, such as the interface between an actuator pivot bearing and an actuator arm in a magnetic hard disk drive.
    Type: Application
    Filed: February 17, 2005
    Publication date: August 17, 2006
    Inventors: Kevin Hanrahan, David Dexter, Ryan Schmidt, Matthew Sprankle
  • Tolerance ring with debris-reducing profile
    Publication number: 20050225903
    Abstract: A tolerance ring for applications requiring cleanliness has contacting portions having a novel profile that reduces debris generation during installation of the tolerance ring while still providing adequate stiffness after installation. The tolerance ring is suitable for cylindrical interface applications where both a reduction in debris generation and high interface stiffness are desirable, such as the interface between an actuator pivot bearing and an actuator arm in a magnetic hard disk drive.
    Type: Application
    Filed: April 2, 2004
    Publication date: October 13, 2005
    Inventors: Matthew Sprankle, Kevin Hanrahan, Damon Brink, David Dexter, Ryan Schmidt
  • Snap ring with recessed interior contour
    Publication number: 20050214101
    Abstract: A snap ring for applications requiring cleanliness has a novel recessed interior contour that reduces debris generation during installation of the snap ring. The snap ring is suitable for applications where a reduction in debris generation is desirable, such as to retain an actuator pivot bearing in information storage devices like magnetic hard disk drives.
    Type: Application
    Filed: March 29, 2004
    Publication date: September 29, 2005
    Inventors: David Dexter, Damon Brink, Ryan Schmidt, Matthew Sprankle, Kevin Hanrahan
  • Snap ring with debris-reducing cross-sectional profile
    Publication number: 20050213256
    Abstract: A snap ring for applications requiring cleanliness has a novel blunted cross-sectional profile that reduces debris generation during installation of the snap ring. The snap ring is suitable for applications where a reduction in debris generation is desirable, such as to retain an actuator pivot bearing in information storage devices like magnetic hard disk drives.
    Type: Application
    Filed: March 29, 2004
    Publication date: September 29, 2005
    Inventors: David Dexter, Damon Brink, Ryan Schmidt, Matthew Sprankle, Kevin Hanrahan