Patents Represented by Attorney Louis J. Bachand

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  • Positive coupling of piezoelectric devices in disk drive suspensions
    Patent number: 6487055
    Abstract: A disk drive suspension and method uses microactuators comprising piezoelectric crystals to drive movement of the load beam beam portion relative to the load beam base portion to shift the beam portion carrying a slider relative to disk tracks by having the load beam portions and the crystals positively coupled to load beam projecting parts extending into the perimeter of the crystals.
    Type: Grant
    Filed: November 1, 2001
    Date of Patent: November 26, 2002
    Assignee: Magnecomp Corporation
    Inventor: Shijin Mei
  • Slider location in head gimbal assemblies using indicia instead of dimple
    Patent number: 6469870
    Abstract: Problems aligning a slider with a dimple in manufacture of head gimbal assemblies for disk drive suspensions are obviated by defining optically readable indicia that serve as a reference for positioning apparatus rather than the dimple.
    Type: Grant
    Filed: October 25, 2001
    Date of Patent: October 22, 2002
    Assignee: Magnecomp Corporation
    Inventors: Robert Summers, Daniel Vera
  • Low mass baseplate for disk drive suspension
    Patent number: 6469869
    Abstract: A low mass baseplate for attaching a suspension load beam to an actuator arm has a planar portion weld-attachable to a load beam base and a cylindrical boss portion attachable to an actuator arm, the planar portion is locally relieved to reduce mass while maintaining the baseplate effectiveness at the load beam spring portion. The baseplate relief is specially sized and configured to be free of entanglements during tumble deburring operations.
    Type: Grant
    Filed: July 6, 2000
    Date of Patent: October 22, 2002
    Assignee: Magnecomp Corporation
    Inventor: Daniel Vera
  • Low voltage, high displacement microactuated disk drive suspension
    Patent number: 6456464
    Abstract: A disk drive suspension comprising a load beam utilizing a piezoelectric microactuator has bendable arcuate spring portion elements which further curl or flatten in response to contraction or expansion of the piezoelectric microactuator to facilitate greater distance beam displacement at lower levels of voltage.
    Type: Grant
    Filed: October 9, 2000
    Date of Patent: September 24, 2002
    Assignee: Magnecomp Corporation
    Inventors: Amanullah Khan, Shijin Mei
  • Snap-in assembly of suspension limiter having both high shock and load/unload cycle capability
    Patent number: 6445546
    Abstract: Disk drive suspensions having limiters with both high shock and load/unload capability are readily assembled by deflecting a normally upstanding tab on the flexure tongue into a slot on the load beam, or vice-versa, where it irreversibly engages the load beam upon returning to its upright condition.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: September 3, 2002
    Assignee: Magnecomp Corporation
    Inventor: Warren Coon
  • Axial force attachment of load beams to actuators
    Patent number: 6442001
    Abstract: A disk drive suspension is mounted to an actuator arm by axial and not radial forces, the forces being imparted by upper and lower flanges of a cylindrical connector extending through the actuator arm and the mount plate to which the load beam is attached.
    Type: Grant
    Filed: December 13, 1999
    Date of Patent: August 27, 2002
    Assignee: Manecomp Corporation
    Inventors: Warren Coon, Wenyu Wu
  • Flexure limiter with snagging feature
    Patent number: 6426851
    Abstract: The disengagement of a disk drive suspension limiter from the load beam is blocked by the provision of a tab that interfits with the load beam against separation during intended engagement.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: July 30, 2002
    Assignee: Magnecomp Corporation
    Inventor: John Perez
  • Suspension load beam mounting system
    Patent number: 6424497
    Abstract: A disk drive suspension mounting system is provided in which staking of the mounting plate to an actuator arm does not distort the mounting plate flange or impinge on gram loading values of the load beam, by increasing the diameter of the bore to from 95% to 99% of the flange opening, decreasing the diameter of the flange opening to slip fit the staking ball, and lengthening the bore so as to maintain displaced mass and torque values.
    Type: Grant
    Filed: August 6, 1998
    Date of Patent: July 23, 2002
    Assignee: Magnecomp-Corp
    Inventor: Warren Coon
  • Trace flexure suspension with differential impedance in read and write conductor circuits
    Patent number: 6424500
    Abstract: A novel flexure provides an improved disk drive suspension, the flexure having a different thickness of insulative film between its metal layer and respective ones of its read and write conductor circuits to vary the circuit impedances accordingly to different and optimum values for each type of circuit.
    Type: Grant
    Filed: June 28, 2001
    Date of Patent: July 23, 2002
    Assignee: Magnecomp Corp.
    Inventors: Warren Coon, Rafael Cuevas
  • Vertical force and stiffness enhanced disk drive suspension and method
    Patent number: 6421206
    Abstract: A wireless-type disk drive suspension comprising a laminate of a spring metal, an insulative plastic film and trace conductors that exerts insufficient vertical force for the slider to operate effectively on the disk is provided with a secondary spring structure generally opposite the slider and that can incorporate a dimple to increase the suspension stiffness and the vertical force.
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: July 16, 2002
    Assignee: Magnecomp Corp.
    Inventor: Amanullah Khan
  • Lower energy welding of flexures to suspension load beams
    Patent number: 6417995
    Abstract: Wireless flexures are laser welded to load beams by first reducing the amount of load beam metal with a recess or the combination of a through hole and a recess at the weld location, to thereby reduce the amount of energy need for the weld and distortion to the parts caused by the heat generated during the welding process.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: July 9, 2002
    Assignee: Magnecomp Corporation
    Inventors: Wenyu Wu, Eduardo Reyes
  • Trace flexure suspension with differential impedance in read and write conductor circuits
    Patent number: 6414820
    Abstract: A novel flexure provides an improved disk drive suspension, the flexure having a different thickness of insulative film between its metal layer and respective ones of its read and write conductor circuits to vary the circuit impedances accordingly to different and optimum values for each type of circuit.
    Type: Grant
    Filed: June 12, 2000
    Date of Patent: July 2, 2002
    Assignee: Magnecomp Corporation
    Inventors: Warren Coon, Rafael Cuevas
  • Horse hoof protection
    Patent number: 6412566
    Abstract: Horse hoof protection is obtained by incorporating a synthetic organic resin such as a urethane resin in the volume defined by the horse hoof bottom wall, suitably covered with a web fixed to the hoof bottom wall that is adhered to the resin. The resin protection is suitably free flowing into place, conforms to the contours of the hoof bottom wall, and adheres to the wall when cured. The protection by the resin is resilient and softer than the hoof wall and acts to cushion the hoof against shock.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: July 2, 2002
    Assignee: Vettec, Inc.
    Inventors: Frank Rovelli, Don D. Porteous, Richard L. Jacobs
  • Low voltage, high displacement microactuated disk drive suspension
    Patent number: 6411475
    Abstract: A disk drive suspension comprising a load beam utilizing a piezoelectric microactuator has locally bendable spring portion elements vertically to laterally disposed relative to the load beam that further curl or flatten in response to contraction or expansion of the piezoelectric microactuator to facilitate greater distance beam displacement at lower levels of voltage.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: June 25, 2002
    Assignee: Magnecomp Corporation
    Inventors: Amanullah Khan, Shijin Mei
  • Suspension with readily manufacturable vertically and laterally offset lifter
    Patent number: 6407889
    Abstract: An easily manufacturable disk drive suspension load beam lifter comprises a lift arm shifted laterally and vertically and cantilevered from the load beam by a web extending at an angle and for a distance from the load beam that is adjustable to provide a predetermined height and position for the lift arm above the disk.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: June 18, 2002
    Assignee: Magnecomp Corp.
    Inventors: Amanullah Khan, Gustavo Nuno
  • Two-piece load beam mount system
    Patent number: 6404593
    Abstract: A two-piece load beam mounting system supports a load beam in operating proximity to a disk, the mounting system comprising a small mount less subject to flatness problems, the mount having a plate and a central boss, the mount plate having lateral and longitudinal dimensions less than the base portion corresponding dimensions, and a support having lateral and longitudinal dimensions to register with the base portion when the support is sandwiched between the mount and the load beam base portion in attached relation to each; the support and mount plate cooperating to have their combined height no greater than the height of the support to achieve a greater stiffness in the mount system without increasing the height.
    Type: Grant
    Filed: June 12, 2000
    Date of Patent: June 11, 2002
    Assignee: Magnecomp Corp.
    Inventor: Alejandro Koji Iwamoto
  • Disk drive suspension with hybrid flexible circuit leads
    Patent number: 6404595
    Abstract: A lower cost metal layer free flexible conductive laminate segment is connected to a relatively smaller amount of the more expensive metal layer containing flexible conductive laminate segment to connect a slider to signal circuitry in a cost efficient way while avoiding biasing of the slider movement by the conductor.
    Type: Grant
    Filed: October 12, 2000
    Date of Patent: June 11, 2002
    Assignee: Magnecomp Corporation
    Inventor: Alejandro Koji Iwamoto
  • Recording head suspension with coupled dimple and channel
    Patent number: 6400532
    Abstract: A recording head suspension is provided having a gimbaling dimple and a cooperating channel of greater longitudinal extension and substantially the same lateral extension as the dimple to permit rotation of the dimple and block substantial lateral movement and dislodgment of the dimple from the channel responsive to a lateral shock to the recording head suspension.
    Type: Grant
    Filed: December 4, 2000
    Date of Patent: June 4, 2002
    Assignee: Magnecomp Corp.
    Inventor: Shijin Mei
  • Disk drive actuator arm with differential load beam base support
    Patent number: 6396666
    Abstract: In a head stack assembly, opposed pairs of up-facing and down-facing head gimbal assembly suspensions are supported on an actuator arm with a sloped end between the suspensions to provide different support to each pair member during staking operations that fasten the suspension to the arm to minimize gram load change differentials resultant from staking.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: May 28, 2002
    Assignee: Magnecomp Corporation
    Inventor: Warren Coon
  • PZT microactuator processing
    Patent number: 6393681
    Abstract: PZT crystals are peripherally coated in manufacture by cutting a series of intersecting first kerfs in a wafer comprising a plurality of PZT crystal precursors, filling the kerfs with a coating resin, and cutting a second, narrower kerf in the locus of the first kerfs to separate the crystals while providing them a peripheral coating of the coating resin.
    Type: Grant
    Filed: January 29, 2001
    Date of Patent: May 28, 2002
    Assignee: Magnecomp Corp.
    Inventor: Robert Summers