Patents by Inventor Joseph D. Perrault

Joseph D. Perrault 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).

  • Patent number: 6344738
    Abstract: A system for use in a memory disk test system is disclosed. The system comprises a fixture for holding a disk head and a moveable slide coupled to the fixture. The system includes a non-magnetic motor system engageably coupled to the slide for moving the test fixture. A system and method in accordance with the present invention offers an SDT system which utilizes piezoelectric motors resulting in higher throughput in producing memory disks. The system and method further achieves high performance, is lower cost in implementation, and is more compact than conventional SDT systems. The system and method, by removing time delay, offers the advantage of cycle time reduction over conventional SDT systems.
    Type: Grant
    Filed: January 24, 2000
    Date of Patent: February 5, 2002
    Assignee: International Business Machines Corporation
    Inventors: Jose H. Garcia, Tony Mello, Eric C. O'Brien, Joseph D. Perrault, Bob C. Robinson, Hong S. Seing