Patents by Inventor Richard K. Wilmer

Richard K. Wilmer 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: 5389850
    Abstract: A sensor for sensing rotational displacements of a body comprises an elongated beam of a material providing a piezoelectric effect. The elongated beam has a first and second ends and a central portion, with the ends of the beam being attached to an interior surface of a case. The case, in turn, is attached to the body. When the body is subject to rotational accelerations, the beam is stressed, and a piezoelectric voltage is generated across the length of the beam.
    Type: Grant
    Filed: February 4, 1994
    Date of Patent: February 14, 1995
    Assignee: Maxtor Corporation
    Inventor: Richard K. Wilmer
  • Patent number: 4996623
    Abstract: A data recording disk file uses a laminated suspension for supporting a negative pressure slider in a manner which prevents the read/write transducer on the slider from contacting the disk surface and which eliminates the effect of stiction. The laminated suspension is a flat, flexible sheet of material bonded on both sides to patterned metal layers. The suspension comprises an arm portion for attachment to the actuator support arm, a slider portion to which the slider is attached, and a link portion interconnecting the arm and slider portions. The first metal layer is preferably stainless steel and the second metal layer is preferably copper. The arm and link portions of the stainless steel layer are spaced apart to form a hinge of flexible material. The portion of either the copper or stainless steel near the hinge region is prestressed or bent so that the link portion of the laminated suspension is biased toward the disk surface.
    Type: Grant
    Filed: August 7, 1989
    Date of Patent: February 26, 1991
    Assignee: International Business Machines Corporation
    Inventors: A. David Erpelding, Darrell D. Palmer, Richard K. Wilmer
  • Patent number: 4789914
    Abstract: A thin film magnetic read/write head/arm assembly and method of manufacturing the same is disclosed herein. Contact soldering of the opposite to disk side of the read/write head to a cable in laminate relationship to the suspension arm, or a polyimide strip with conductors deposited thereon provides both electrical interconnection and mechanical support. Semiconductor devices can also be intermediately soldered between the head and cable for maximum noise suppression.
    Type: Grant
    Filed: October 28, 1986
    Date of Patent: December 6, 1988
    Assignee: International Business Machines Corporation
    Inventors: Norman G. Ainslie, Vlasta A. Brusic, Daniel W. Chapman, Lubomyr T. Romankiw, Richard K. Wilmer
  • Patent number: 4670804
    Abstract: A suspension for an air-bearing slider 32 in a data recording disk file is an envelope 30 which expands when pressurized air enters the envelope interior. The envelope 30 includes a pair of flat flexible sheets 50, 52, preferably of polyimide, which are secured at their perimeters 54, and stiffeners 40, 42, 56 bonded to the sheets 50, 52 to provide stiffness between the slider 32 and the arm attached to the disk file actuator. Four parallel strips 60, 62, 63, 64 on the polyimide sheets 50, 52 function as hinges so that the envelope expands in the manner of a four-bar linkage, thus moving the slider 32 toward the disk with the slider's air-bearing surface maintained generally parallel to the data surface of the disk. Electrical conductors 80 for connecting the read/write transducer 33 supported on the slider 32 to the read/write circuitry of the disk file are formed on one of the polyimide sheets 50.
    Type: Grant
    Filed: October 15, 1985
    Date of Patent: June 2, 1987
    Assignee: International Business Machines Corporation
    Inventors: Rishi Kant, Dennis R. McEfee, Thomas F. Roth, Richard K. Wilmer