Patents Assigned to Magnecomp Corporation
  • PZT microactuator
    Patent number: 6703767
    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: March 26, 2002
    Date of Patent: March 9, 2004
    Assignee: Magnecomp Corporation
    Inventor: Robert Summers
  • High capacity card and reader system
    Patent number: 6550678
    Abstract: Optical data card and reader system for recording data in which the card has approximately the dimensions of a credit card, the card having a laser readable layer comprising plural tracks of light-detectable indicia arranged in an angular or X-Y grid, and a laser reader therefor being adapted to scan the tracks by relative angular or X-Y movement between the laser and the card.
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: April 22, 2003
    Assignee: Magnecomp Corporation
    Inventors: Albert Ong, Mark Burkhart
  • Chip-mounted disk drive suspension
    Patent number: 6496331
    Abstract: The invention provides greatly shortened electrical paths for the wires or traces connecting a disk drive suspension slider to the preamplifier circuit chip without problems of chip wastage by supporting the disk drive suspension assembly of a slider, a flexure, a load beam and a mounting plate, all in operative association on the preamplifier circuit chip, and supporting the chip on the actuator arm.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: December 17, 2002
    Assignee: Magnecomp Corporation
    Inventors: Warren Coon, Amanullah Khan
  • Trace flexure with controlled impedance
    Patent number: 6493190
    Abstract: Impedance controlled trace flexure for a disk drive suspension comprising a laminated of a metal layer, an insulative film layer and at least one pair of conductive traces extending between spaced points on the flexure and adhered to the film layer in metal layer-spaced relation, at least one member of the pair being varied relative to the other pair member in that the length of at least one member between the spaced points is made greater than the distance between the spaced points or in width or thickness to control the impedance of the one pair member to match or not match the impedance of said the pair member.
    Type: Grant
    Filed: September 7, 2000
    Date of Patent: December 10, 2002
    Assignee: Magnecomp Corporation
    Inventor: Warren Coon
  • 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
  • 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
  • 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 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • Wireless suspension with interrupted load beam
    Patent number: 6381099
    Abstract: In a disk drive suspension the conventional load beam spring section is replaced by the spring metal layer of the flexible conductor that forms the flexure providing more accurate spring function without the need of critical etching steps in the load beam spring section.
    Type: Grant
    Filed: April 21, 2000
    Date of Patent: April 30, 2002
    Assignee: Magnecomp Corporation
    Inventor: Shijin Mei
  • One-piece load beam and gimbal flexure using flexible circuit
    Patent number: 6377425
    Abstract: A disk drive suspension has a lower stiffness gimbal flexure formed in one piece with a load beam by setting off the flexure frame from the load beam rigid portion, reducing the frame thickness by partial etch, maintaining the flexure tongue thickness at that of the load beam rigid portion, and completing the flexure frame with flexible conductor connected to the distal end of the frame, metal layer in the flexible conductor being removed to maintain low stiffness while connecting the flexible conductor to the flexure tongue in motion limiting relation.
    Type: Grant
    Filed: May 30, 2001
    Date of Patent: April 23, 2002
    Assignee: Magnecomp Corporation
    Inventor: Amanullah Khan
  • Method of protecting a horse's hoof
    Patent number: 6364025
    Abstract: Horse hoof protection is obtained by incorporating a urethane resin reaction product of low viscosity sides A and B which react rapidly to gel in a few seconds while filling the interstices or the horse's hoof and have when reacted a low hardness of 40 to 80 Shore A to cushion the hoof.
    Type: Grant
    Filed: March 1, 2001
    Date of Patent: April 2, 2002
    Assignee: Magnecomp Corporation
    Inventor: Richard L. Jacobs
  • Suspension with modified loan beam for dynamic pitch control
    Patent number: 6341050
    Abstract: Optimum pitch attitude during and between slider contact with a disk in a disk drive is provided by articulating the suspension load beam rigid portion intermediate its ends to flex in the unloaded condition to provide a small positive pitch to the slider and to provide a 0° pitch in the loaded condition when the slider is in operating contact with the disk.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: January 22, 2002
    Assignee: Magnecomp Corporation
    Inventor: Warren Coon
  • Low voltage, high displacement microactuated disk drive suspension reference to related applications
    Patent number: 6335849
    Abstract: A disk drive suspension comprising a load beam utilizing a piezoelectric microactuator has arcuate 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: February 5, 2001
    Date of Patent: January 1, 2002
    Assignee: Magnecomp Corporation
    Inventors: Amanullah Khan, Shijin Mei