Patents by Inventor Patrick Mark Hamill

Patrick Mark Hamill 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).

  • Double annular abrasive element dressers
    Patent number: 8317573
    Abstract: An apparatus and associated method for dressing a workpiece. A first annular abrasive dressing element is attached to a base, an inner arcuate edge of the first annular abrasive dressing element defining a cavity. A second annular abrasive dressing element is also attached to the base and disposed in the cavity, an outer arcuate edge of the second annular abrasive dressing element noncontactingly separated from the inner arcuate edge of the first annular abrasive dressing element defining a circumferential space therebetween.
    Type: Grant
    Filed: April 9, 2008
    Date of Patent: November 27, 2012
    Assignee: Seagate Technology LLC
    Inventor: Patrick Mark Hamill
  • DOUBLE CONCENTRIC SOLID WHEEL DIAMOND DRESSERS
    Publication number: 20090258581
    Abstract: A dresser for dressing a grind stone including two concentric solid wheel dressing elements. The dressing elements include an abrasive material within a matrix material. The grind stones dressed with the dressers of the invention operate at high removal rates thereby grinding substrates quickly and at low cost. The grind stones dressed with the dressers of the invention also produce favorable mechanical surface characteristics such as low waviness and flatness.
    Type: Application
    Filed: April 9, 2008
    Publication date: October 15, 2009
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventor: Patrick Mark Hamill
  • FORMULATION OF GRINDING COOLANT
    Publication number: 20080203352
    Abstract: A new coolant for grinding the surface of the substrate of a magnetic recording medium is disclosed. The new coolant maintains the removal rate at about 1 mil/min even after 58 runs after dress. On the other hand, the removal rate using a commercially available coolant drops to less than 0.3 mil/min after only about 35 runs after dress.
    Type: Application
    Filed: May 5, 2008
    Publication date: August 28, 2008
    Applicant: Seagate Technology LLC
    Inventors: Patrick Mark Hamill, James Mark Mallon
  • Formulation of grinding coolant
    Publication number: 20040256595
    Abstract: A new coolant for grinding the surface of the substrate of a magnetic recording medium is disclosed. The new coolant maintains the removal rate at about 1 mil/min even after 58 runs after dress. On the other hand, the removal rate using a commercially available coolant drops to less than 0.3 mil/min after only about 35 runs after dress.
    Type: Application
    Filed: May 24, 2004
    Publication date: December 23, 2004
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Patrick Mark Hamill, James Mark Mallon