Michael G Machado, Ronald R Moon, Thomas A Tacklind, William G Moon, Bruce R Peterson, Clifford M Gold, Daniel E Barnard, James H Do: High capacity submicro-winchester fixed disk drive. Quantum Corporation, David B Harrison, October 19, 1993: US05255136 (168 worldwide citation)

A miniature disk drive achieves storage densities of at least approximately 1700 tracks per inch per storage surface of a storage disk defining a series of radially extensive servo sectors embedded within circumferential zones of data tracks. The sectors are recorded at a constant data transfer rate ...

J David Kopf, William Seiler Jr, Gerald S Palecki, Howard H Kaufman: Head positioner. David Kopf Instruments, Bruce H Johnsonbaugh, March 17, 1981: US04256112 (167 worldwide citation)

A head positioner for radiologic and other medical procedures and a method for forming the head positioner are disclosed. A plastic rear component engages the backside of the patient's head, left and right plastic components engage each auditory meatus of the patient and a front component engages th ...

Nathan R Smith: Electronic test head positioner for test systems. inTEST Corporation, Ratner & Prestia, November 10, 1987: US04705447 (143 worldwide citation)

A system for positioning an electronic test head of a test system with respect to an electronic device handler. A positioner assembly moves vertically and provides substantial movement in the horizontal plane with six degrees of freedom. The positioner assembly includes a section for attaching the t ...

Li Zou, Duc H Banh: Ramp detection by profile sweep method utilizing integrator values. Western Digital Technologies, November 20, 2012: US08315005 (107 worldwide citation)

A system to detect a ramp position is disclosed. The system includes a head positioner coupled to an actuator arm to position a head relative to a disk and a controller to: control the head positioner to move the head toward the ramp; determine a plurality of integrator values while moving the head; ...

Sean S Wong: Ramp detection during servo-writing of a disk for a disk drive. Western Digital Technologies, January 11, 2011: US07869155 (107 worldwide citation)

A servo writer to detect a ramp is disclosed. The servo writer includes a head positioner to position a head of an actuator arm of a head disk assembly relative to a disk and a controller to: control the head positioner to move the head of the actuator arm toward a ramp of the disk; determine a head ...

Teddy T C Chen, Jinsheng Bill Jang, Jie Yu, Masao Miyamura: System and method for writing servo sectors in a perpendicular media recording environment. Western Digital Technologies, Blakely Sokoloff Taylor & Zafman, June 17, 2008: US07388728 (105 worldwide citation)

A perpendicular media recording (PMR) servo track writer (STW) system and method for writing servo sectors onto a disk is disclosed. The servo writer includes a head positioner to position a head of a head disk assembly (HDA) relative to a disk, wherein the head writes servo sectors onto the disk wi ...

Ronald R Moon: Edge servo for disk drive head positioner. Quantum Corporation, David B Harrison, December 8, 1992: US05170299 (87 worldwide citation)

A method for determining the position of a data transducer head within one data track of a rotating data storage disk within a disk drive includes the steps of:

Tom L Lee: Thermal compensated head positioner servo for disk drive. Quantum Corporation, David B Harrison, July 7, 1992: US05128813 (77 worldwide citation)

Thermal compensation is provided to a seek mode servo loop of a disk drive having a head and disk assembly including a spindle motor for rotating at least one data storage disk and an electromechanical actuator structure for positioning a data transducer head relative to concentric data tracks defin ...

Donald R Cutler, Robert M Pailthorp, Mark A Unrath, Thomas W Richardson, Alan J Cable: Multi-tool positioning system. Electro Scientific, Stoel Rives, December 8, 1998: US05847960 (73 worldwide citation)

A multi-rate, multi-head positioner (150) receives and processes unpanelized positioning commands to actuate slow stages (56, 58) and multiple fast stages (154) that are mounted on one of the slow stages to simultaneously position multiple tools (156) relative to target locations (162) on multiple a ...

Lloyd Levy, Michael W Warner, Dan L Kilmer: Compact magnetic head flexible suspension. Micropolis Corporation, Poms Smith Lande & Rose, January 10, 1989: US04797763 (66 worldwide citation)

A digital memory system of the hard or Winchester disk type, includes a series of hard disks, and pivoted mounting arms for the magnetic heads or sliders. In order to minimize the vertical, or inter-disk space occupied by the sliders and their mounting arms when used in a rotary type of head positio ...