US Patent No: 4,933,785

Number of patents in Portfolio can not be more than 2000

Disk drive apparatus using dynamic loading/unloading

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Abstract

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A disk drive apparatus is disclosed for primary use with portable, laptop or other information storage systems. The disk drive apparatus includes one or more about 2.5 inch hard disks. A rotary actuator is utilized and includes an arm assembly having a cam follower member for use in dynamically loading/unloading read/write head(s). The cam follower member moves along a ramp, which forms a cam surface, for loading/unloading. The spin motor assembly of the disk drive apparatus includes a rotor having a clamp ring that enables a more powerful spin motor to be incorporated, as well as facilitating and enhancing the connection of the hard disks to the spin motor. The disk drive apparatus also includes servo electronics responsive to a back emf generated signal for use in the servo operation, which use has the potential to increase the servo bandwidth. The accuracy of the servo operation is also enhanced by the use of a flexible circuit that prevents unwanted torque from being applied to the actuator during operation. The disk drive electronics also includes hardware and software for reducing power consumption.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
ALPS ELECTRIC CO., LTD.TOKYO3442
SEAGATE TECHNOLOGY LLCSCOTTS VALLEY, CA5514

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Andrews, Jr Thomas L Ward, CO 9 520
Blagaila, John H Boulder, CO 17 582
Furay, David M Boulder, CO 32 1096
Johnson, Terry G Longmont, CO 4 316
Morehouse, James H Jamestown, CO 39 1379

Cited Art Landscape

Patent Info (Count) # Cites Year
 
MAXTOR CORPORATION (2)
4,503,530 Disk hub spindle system 11 1982
4,639,863 Modular unitary disk file subsystem 124 1985
 
Amcodyne Incorporated (1)
4,535,374 Whitney-type head loading/unloading apparatus 120 1982
 
BROTHER KOGYO KABUSHIKI KAISHA (1)
4,737,867 Power saving arrangement in information recording system 37 1985
 
EMC CORPORATION (1)
4,458,273 Magnetic disk drive control apparatus and method 27 1981
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (1)
4,200,827 Positioning system employing feedforward and feedback control 49 1977
 
MICROSCIENCE INTERNATIONAL (TAIWAN) LTD. (1)
4,599,666 Disk drive system apparatus band actuator 11 1983
 
QUANTUM CORPORATION (1)
4,772,974 Compact head and disk assembly 60 1987
 
RODIME PLC ROTHESAY HOUSE, ROTHESAY PLACE, GLENROTHES, KY7 6PW, FIFE SCOTLAND (1)
4,568,988 Micro hard-disk drive system 73 1984
 
RS PATENT HOLDING CORP. (1)
4,638,383 Micro hard-disk drive system 60 1985
 
SIEMENS AKTIENGESELLSCHAFT (1)
4,672,487 Magnetic disk memory having a disk pack hub seated at both sides of a disk pack 29 1985

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
MOBILE STORAGE TECHNOLOGY INC. (39)
5,289,325 Rigid disk drive with dynamic head loading apparatus 51 1990
5,258,695 Spin motor control system for a hard disk assembly 32 1990
5,218,253 Spin motor for a hard disk assembly 16 1990
5,189,576 Rotary inertial latch for disk drive actuator 42 1990
5,321,560 Embedded servo system for low power disk drives 25 1991
5,296,986 Rotary intertial latch for disk drive actuator to protect against rotational shock force 25 1991
5,466,997 Spin motor control system for a hard disk assembly 23 1993
5,995,330 Rigid disk drive with dynamic head loading apparatus 24 1993
5,559,648 Method for optimizing track location during servo writing 25 1993
5,469,314 Miniature disk drive with dynamic head loading 27 1993
5,408,374 Miniature hard disk drive with spin motor for portable computer 14 1993
5,377,065 Miniature hard disk drive for portable computer having a rotary inertial latch for disk drive actuator 28 1993
5,442,266 Miniature disk drive with spin motor control system 41 1993
5,426,562 Disk drive enclosed by shock absorbent jacket and mounted in electronic instrument 52 1993
5,448,433 Disk drive information storage device with baseplate and cover having overlapping edge portions to provide protection from electromagnetic interference 44 1993
5,404,257 Rotary inertial latch for disk drive actuator 44 1993
5,592,349 Microminiature disk drive with clamp having fingers for radially positioning a pair of disks and a spindle motor providing a reduced disk drive height 18 1993
5,579,189 Microminiature hard disk drive 16 1993
5,760,983 Method for optimizing AGC in a servo field including multiple use of an AGC sub-field and sub-field ordering 12 1994
5,835,303 Microminiature hard disk drive 7 1994
5,596,458 Variable zone layout for information storage disk drive 41 1994
5,760,986 Microminiature hard disk drive 36 1995
5,486,964 Miniature disk drive with dynamic head loading with skewed lifting tab 16 1995
5,946,153 Information storage disk drive with variable zone layout 8 1996
5,870,237 Method for variable zone layout for information storage disk drive 30 1996
5,853,513 Method of producing a stator for a disk drive motor 4 1996
6,057,987 Rigid disk drive with dynamic head loading apparatus and method of manufacturing a rigid disk drive with dynamic head loading apparatus 17 1996
5,694,267 Removable disk drive and protective device 22 1996
6,032,352 Method of manufacturing rigid disk drive with dynamic head loading apparatus 17 1996
5,689,386 Miniature hard disk drive with EMI protection and single permanent magnet rotary actuator having an improved housing seal 9 1996
5,724,209 Low-profile disk mounting assembly, and low-profile disk drives constructed therefrom 10 1996
5,867,340 Microminiature hard disk drive with adaptive runout compensation 14 1997
5,822,150 Disk drive including a substantially monolithic stator assembly fabricated from low loss magnetic material 24 1997
6,260,257 Method of manufacturing an information storage disk drive with variable zone layout and track pitch parameter considerations 28 1997
6,091,559 Variable zone layout and track pitch parameter considerations for information storage disk drive 44 1997
6,005,725 Variable zone layout and track pitch parameter considerations for information storage disk drive 26 1997
6,134,069 Method of power saving in a disk drive apparatus with head unloading and spin reduction 8 1997
6,310,747 Method for reducing external signal interference with signals in a computer disk storage system 16 1998
7,342,741 Disk drive with variable track density 5 2000
 
SEAGATE TECHNOLOGY LLC (33)
5,025,336 Disk drive apparatus 125 1989
5,095,396 Unitary E-block assembly for use in a disk drive 53 1990
5,231,549 Disk drive apparatus with cam and follower for unloading heads 47 1990
5,267,376 Apparatus for attaching a printed circuit cable mount 4 1990
5,235,482 Magnetic disk drive incorporating a mechanically damped base 72 1991
5,341,260 Reduced torque unloading ramp system for a hard disk drive 22 1992
5,337,202 Actuator arm assembly printed circuit cable to external printed circuit board interface apparatus 37 1993
5,402,200 Low-power hard disk drive system architecture 29 1993
5,490,024 Disk clamp having an annular section of increased rigidity 17 1993
5,621,582 Disk drive including a baseplate well for the spin motor 3 1993
5,463,507 Low profile disk drive apparatus incorporating a three-tiered housing 3 1993
5,532,889 Winchester drive card including an actuator arm body, actuator arm plates, and a VCM magnet external to a controlled environment 42 1994
5,808,830 Architecture for 2-1/2 inch diameter single disk drive 23 1994
6,226,143 Disk drive having support posts aligned with storage disk and actuator mounting points to reduce mechanical off-tracking 18 1995
5,796,557 Disk drive architecture including a current-induced latching device 14 1995
5,675,230 Method and apparatus for dynamic low voltage spindle motor operation 10 1996
5,764,437 Pivoting ramp for dynamic load/unload files 21 1996
5,875,074 Adjustable head loading apparatus 16 1997
6,055,134 Combined load/unload ramp and snubber for disc drives 21 1998
6,278,584 Friction control on HGA ramp load/unload surface 5 1998
6,134,076 Adjustment feature for load/unload alignment of multiple disk stack ramp assembly 9 1998
6,122,130 Intelligent lubricant for ramp load/unload 9 1998
6,067,208 Adjustment feature for load/unload alignment ramp assembly 2 1998
6,535,353 Capped polymeric load/unload pads 7 1998
6,502,189 Method and dedicated frame buffer for loop initialization and responses 29 1998
6,535,355 Pitch and roll attitude control for sliders in a disk drive 12 1998
6,429,999 Pre-assembled voice coil magnetic assembly and rotatable attachment structure/method to base plate for disc drive 11 1999
6,208,489 Head stack-level load/unload mechanism for rigid disk drives 2 1999
6,721,134 Ramp design for dynamic load 4 2000
6,577,473 Disc drive ramp that accomodates shipping comb 8 2000
6,714,377 Data storage device operated for reduced sliding contact 4 2001
7,853,809 System and method of power management 5 2007
7,715,145 Variable spindle speed for ramp unload 1 2008
 
CORNICE, INC. (13)
7,106,541 Digital device configuration and method 18 2001
6,791,799 Digital device configuration and method 53 2002
6,973,535 Digital device configuration and method 23 2003
7,546,411 Digital device configuration and method 3 2005
7,165,139 Digital device configuration and method 10 2005
7,162,577 Digital device configuration and method 7 2005
7,162,578 Digital device configuration and method 11 2005
7,149,891 Digital device configuration and method 9 2005
8,001,321 Digital device configuration and method 4 2005
7,702,847 Digital device configuration and method 2 2005
7,689,785 Digital device configuration and method 2 2005
7,551,382 Digital device configuration and method 2 2005
7,817,380 Ramp arrangement for a disk drive and method 0 2009
 
HGST NETHERLANDS B.V. (10)
5,452,277 Adaptive system for optimizing disk drive power consumption 61 1993
5,455,723 Method and apparatus for ramp load and unload 64 1994
5,521,896 Adaptive system for optimizing disk drive power consumption 27 1995
5,572,387 Low profile head suspension assembly with load and unload capability 29 1995
5,682,273 Disk drive for portable computer with adaptive demand-driven power management 91 1995
5,544,138 Adaptive system for optimizing disk drive power consumption 54 1995
5,963,392 Method and apparatus for disk shock protection 15 1997
5,831,786 Disk drive having position sensor for ramp load and unload, and method for its use 25 1997
5,963,393 Servo-free velocity estimator for coil driven actuator arm in a data storage drive 13 1998
7,859,796 Disk drive and arm coil support assembly 1 2005
 
HITACHI GLOBAL STORAGE TECHNOLOGIES JAPAN, LTD. (10)
5,532,563 Disk device with auxiliary battery and start method thereof 16 1994
5,671,107 Large capacity magnetic disc apparatus with a particular relationship between pole thickness, saturated flux density, and recording wavelength 2 1995
5,737,150 Magnetic disk unit with an impact force applying mechanism 0 1996
5,982,570 Information storing device and method for controlling same to record/reproduce information by selecting one of working modes 26 1997
6,104,574 Magnetic head with a magnetic pole sandwiched between conductive materials 12 1998
6,151,182 Information storing device and method for controlling same to record/reproduce information by selecting one of working modes 15 1999
6,381,087 Information storing device and method for controlling same to record/reproduce information by selecting one of working modes 4 2000
6,476,994 Information storing device and method for controlling same to record/reproduce information by selecting one of working modes 4 2002
6,563,658 Information storing device and method for controlling same to record/reproduce information by selection one of working modes 4 2002
8,345,371 Information storing device and method for controlling same to record/reproduce information by selecting one of working modes 0 2010
 
MAXTOR CORPORATION (10)
5,027,241 Data head load beam for height compacted, low power fixed head and disk assembly 166 1990
5,255,136 High capacity submicro-winchester fixed disk drive 172 1991
5,208,712 Data head load beam for height compacted, low power fixed head and disk assembly 58 1991
5,631,788 Flex circuit for head and disk assembly 34 1992
5,491,395 TUT servo IC architecture 23 1993
5,389,850 Rotational shock sensor 16 1994
5,517,649 Adaptive power management for hard disk drives 34 1994
5,594,600 Dual internal bus system architecture for hard disk drive 30 1995
6,104,565 System architecture for hard disk drive 7 1998
7,355,814 Disk texture located in load/unload zone of disk for cleaning contamination and disk lubricant from head ABS surface 0 2005
 
WESTERN DIGITAL TECHNOLOGIES, INC. (9)
5,270,887 Compact disk drive head disk assembly with conformable tape seal 58 1991
5,345,347 Disk drive with reduced power modes 78 1992
5,654,840 Hard disk drive which uses the back EMF of the actuator to detect shocks 50 1994
5,570,250 Disk drive head disk assembly actuator mount mechanism 13 1994
5,768,045 Hardware velocity limit control system 30 1995
5,818,667 Retaining apparatus for a disk drive actuator assembly electrical flex circuit 32 1997
5,953,183 Head stack assembly for a magnetic disk drive with a pass-through flex circuit cable 30 1997
7,729,091 Clip for mounting a flex cable within a head stack assembly 2 2005
7,961,436 Disk drive head stack assembly with clip for mounting a flex cable 1 2010
 
EMC CORPORATION (8)
5,831,795 Head loading mechanism for a disk drive 46 1997
6,002,547 Disk drive with a rotatably mounted disk drive motor 3 1997
5,995,332 Scissoring load ramp for a removable media disk drive 9 1997
5,930,090 Data cartridge with compression return spring following arcuate guide 12 1997
6,204,982 Method and apparatus for cartridge ejection and overwrite protection 1 1998
6,054,833 Disk drive having improved head-velocity control, and method therefor 17 1999
6,147,837 Data cartridge having arcuate shutter spring 4 1999
6,191,913 Motor loading system for a disk drive 3 1999
 
HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V. (7)
6,430,001 Integrated data storage disk and disk drive 9 1995
6,208,485 Microfile 8 1995
5,623,758 Method of fabricating a low profile head suspension assembly having load and unload capability 21 1995
5,822,141 High speed FET write driver for an inductive head 33 1996
5,781,363 Servo-free velocity estimator for coil driven actuator arm in a data storage drive 39 1996
5,864,448 Slider and suspension retention and retraction system for high capacity disk drive 27 1997
5,936,788 Method and apparatus for ramp load and unload 27 1998
 
SUMITOMO BANK OF NEW YORK TRUST COMPANY (7)
5,303,171 System suspend on lid close and system resume on lid open 44 1992
5,446,904 Suspend/resume capability for a protected mode microprocessor 152 1992
5,394,527 Method and apparatus facilitating use of a hard disk drive in a computer system having suspend/resume capability 22 1993
6,223,293 Suspend/resume capability for a protected mode microprocessor 28 1995
6,378,068 Suspend/resume capability for a protected mode microprocesser 171 1995
5,903,766 Suspend/resume capability for a protected mode microprocessor 20 1997
6,301,673 Suspend/resume capability for a protected mode microprocessor 11 1997
 
LENOVO (SINGAPORE) PTE LTD. (6)
5,513,359 Desktop computer having a single-switch suspend/resume function 37 1993
5,497,494 Method for saving and restoring the state of a CPU executing code in protected mode 62 1993
5,548,763 Desk top computer system having multi-level power management 48 1993
5,511,202 Desktop computer system having zero-volt system suspend and control unit for ascertaining interrupt controller base address 16 1993
6,016,549 Peripheral unit having at least two sequencer circuits configured to control data transfers for power saving 17 1997
5,954,820 Portable computer with adaptive demand-driven power management 89 1997
 
WARREN & LEWIS INVESTMENT CORPORATION (5)
5,551,033 Apparatus for maintaining one interrupt mask register in conformity with another in a manner invisible to an executing program 18 1992
5,652,890 Interrupt for a protected mode microprocessor which facilitates transparent entry to and exit from suspend mode 29 1993
6,193,422 Implementation of idle mode in a suspend/resume microprocessor system 30 1994
5,974,261 Method and apparatus facilitating use of a hard disk drive in a computer system having suspend/resume capability 2 1995
5,765,004 Suspend/resume capability for a protected mode microprocessor 28 1995
 
Convolve, Inc. (4)
7,483,232 Dynamic system control method 0 2001
7,433,144 Dynamic system control method 5 2001
6,560,658 Data storage device with quick and quiet modes 13 2001
7,620,739 Dynamic system control method 2 2002
 
PANASONIC CORPORATION (4)
7,082,009 Accurate tracking of coil resistance based on current, voltage and angular velocity 9 2003
7,009,806 Accurate tracking of coil resistance 8 2003
6,917,486 Direct detection of coil resistance 9 2003
7,236,331 System and method to provide a ramp having a location which is transitioning from a first grade to a second grade for removing a read/write head from a media 1 2004
 
TOSHIBA STORAGE DEVICE CORPORATION (4)
5,880,904 Disk drive having a thickness equal to an IC memory card 19 1995
5,608,592 Head actuator 13 1995
6,016,237 Shaft construction of a disk drive 1 1998
6,025,973 Construction for attaching a disk in a disk drive 19 1998
 
WESTERN DIGITAL (FREMONT), INC. (4)
5,535,074 Disk drive apparatus having up and down head supsensions independently loadable into a space between immediately adjacent disks 24 1995
6,437,945 Airflow assisted ramp loading and unloading of sliders in hard disk drives 4 1999
6,717,773 Airflow assisted ramp loading and unloading of sliders in hard disk drives 3 2002
6,856,489 Airflow assisted ramp loading and unloading of sliders in hard disk drives 0 2004
 
BENHOV GMBH, LLC (3)
7,593,192 Ramp arrangements for a disk drive and method 0 2006
8,312,209 Digital device configuration and method 1 2011
8,631,196 Digital device configuration and method 0 2012
 
HITACHI, LTD. (3)
5,875,072 Low profile head suspension assembly with load and unload capability 22 1997
6,865,048 Information storing device and method for controlling same to record/reproduce information by selecting one of working modes 5 2003
7,982,999 Information storing device and method for controlling same to record/reproduce information by selecting one of working modes 0 2005
 
MITSUBISHI DENKI KABUSHIKI KAISHA (3)
5,189,575 Read/write head retract mechanism 34 1990
RE36672 Read/write head retract mechanism 3 1997
RE38390 Read/write head retract mechanism 3 1999
 
DZU CORPORATION (2)
5,596,738 Peripheral device control system using changeable firmware in a single flash memory 113 1995
5,886,850 High capacity, low profile disk drive system 11 1995
 
FUJITSU LIMITED (2)
5,349,486 Magnetic disk storage apparatus having a vibration proof structure 73 1992
5,717,541 Flexible circuit assembly for disk storage system 19 1995
 
INTEGRAL PERIPHERALS, A CORP. OF DE (2)
5,379,171 Microminiature hard disk drive 46 1991
5,237,472 Rigid disk drive with dynamic head loading apparatus 66 1991
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (2)
5,585,980 Low friction device for an actuator arm of a disk drive 26 1994
6,160,686 Composite ramp structure for data storage devices 6 1998
 
KABUSHIKI KAISHA TOSHIBA (2)
5,995,322 Magnetic disk apparatus 11 1997
6,765,762 Disk drive with a parking ramp for parking heads 10 2002
 
NEC CORPORATION (2)
5,539,590 Floppy disk controller allowed to detect status change of floppy disk driver in standby mode 5 1994
5,719,722 Head tracking system for a magnetic disk drive, and having an actuator for positioning the read/write head to the target track based on total error signal 2 1995
 
Pont Peripherals Corporation (2)
5,446,609 Low profile disk drive assembly 11 1992
5,483,419 Hot-swappable multi-cartridge docking module 170 1993
 
TDK CORPORATION (2)
5,394,281 Magnetic head loading/unloading mechanism with a ramp having an oscillating function 14 1992
5,408,375 Low-vibration retraction cam for recording/playback apparatus 12 1993
 
TEAC CORPORATION (2)
5,148,339 Magnetic disk storage 30 1990
6,385,006 High capacity, low profile disk drive system 6 1998
 
ALLEGRO MICROSYSTEMS, LLC (1)
5,473,238 Disc drive power management system 14 1993
 
ALPS ELECTRIC CO., LTD. (1)
5,105,321 Disk drive including flexible print board and back tension regulating piece 5 1991
 
Dastek Corporation (1)
5,537,269 Method for loading the slider of a head gimbal assembly 12 1994
 
DATA DOMAIN (1)
7,007,141 Archival data storage system and method 16 2002
 
KOMAG, INC. (1)
5,673,156 Hard disk drive system having virtual contact recording 52 1995
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
5,274,519 Magnetic recording apparatus with air vane actuated regulating member for head slider 32 1991
 
MEDIATEK INC. (1)
6,512,652 Power saving method and apparatus for computer disk drives 40 1996
 
MITSUMI ELECTRIC CO., LTD. (1)
5,412,809 Disk drive power control circuit and method 63 1992
 
RESEARCH INVESTMENT NETWORK, INC. (1)
5,033,039 Positioning system for flexure mounted read/write head 12 1989
 
SAMSUNG ELECTRONICS CO., LTD. (1)
7,602,586 Head parking ramp for data storage device 4 2005
 
SONY CORPORATION (1)
5,625,514 Disk Device 24 1995
 
TECH BYTE SYSTEMS LLC (1)
6,081,400 Power-off method and device for electronic storage apparatus 17 1997
 
TOTTORI SANYO ELECTRIC CO., LTD. (1)
4,991,129 Dual mode actuator for disk drive useful with a portable computer 78 1989
 
Other [Check patent profile for assignment information] (1)
5,412,522 Portable low profile information storage system 46 1994

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