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Class Information
Number: 360/78.13
Name: Dynamic magnetic information storage or retrieval > Automatic control of a recorder mechanism > Controlling the head > Track changing > For rotary carrier (e.g., disc) > Including particular head actuator > Stepping motor
Description: Subject matter wherein the head is moved by an electric motor which produces motion in a series of discrete steps.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7518821 |
Hard disk drive |
Apr. 14, 2009 |
| 7239108 |
Method for stepper motor position referencing |
Jul. 3, 2007 |
| 7023653 |
Floppy disk apparatus |
Apr. 4, 2006 |
| 6950262 |
Flexible disk drive control method capable of preventing a seek error from occurring |
Sep. 27, 2005 |
| 6870701 |
Motor driving device and disk device |
Mar. 22, 2005 |
| 6754028 |
Control integrated circuit for floppy disk drive |
Jun. 22, 2004 |
| 6738219 |
Seek pattern formation circuit |
May. 18, 2004 |
| 6738213 |
Disk drive for controlling maximum current that flows through same |
May. 18, 2004 |
| 6697210 |
Disk device |
Feb. 24, 2004 |
| 6555985 |
Stepping motor control device |
Apr. 29, 2003 |
| 6515821 |
Floppy disk drive control apparatus capable of ensuring seek operation using a stepping motor having a low torque |
Feb. 4, 2003 |
| 6351093 |
Floppy disk drive control apparatus capable of ensuring seek operation using a stepping motor having a low torque |
Feb. 26, 2002 |
| 6310413 |
Steering magnets to reduce magnetic leakage flux in a disk drive |
Oct. 30, 2001 |
| 6295507 |
Calibration method for acceleration sensor in storage device and storage device |
Sep. 25, 2001 |
| 6271636 |
Servo control system and method for a data storage device with improved braking |
Aug. 7, 2001 |
| 6147832 |
Floppy disk drive with PWM control |
Nov. 14, 2000 |
| 6072656 |
Stepping motor control method |
Jun. 6, 2000 |
| 6057978 |
Disk driving device selectively using delayed step pulses |
May. 2, 2000 |
| 6023145 |
Head and disk tester with a thermal drift-compensated closed-loop positioning system |
Feb. 8, 2000 |
| 5805375 |
Wobble motor microactuator for fine positioning and disk drive incorporating the microactuator |
Sep. 8, 1998 |
| 5783884 |
Coil components and motor using the coil components |
Jul. 21, 1998 |
| 5687142 |
Disc apparatus having a plurality of reading/recording head driving manners for disc track seeking movement |
Nov. 11, 1997 |
| 5663846 |
Driving apparatus for floating-type magnetic head |
Sep. 2, 1997 |
| 5661389 |
Compact circuit for controlling a floppy disk driver |
Aug. 26, 1997 |
| 5581421 |
Method for driving stepping motor for head seek in disk drive device |
Dec. 3, 1996 |
| 5552945 |
Transducer recalibration system and method for a rotating disk data storage |
Sep. 3, 1996 |
| 5550447 |
Pulse generating system responding to instruction pulses for generating driving pulses for diving motor |
Aug. 27, 1996 |
| 5545963 |
Seek method and apparatus |
Aug. 13, 1996 |
| 5521770 |
Disc apparatus having a plurality of reading/recording head driving manners for disc track seeking movement |
May. 28, 1996 |
| 5452153 |
Servo controlled magnetic head positioner |
Sep. 19, 1995 |
| 5442497 |
Head shifting device in a recording and/or reproducing apparatus |
Aug. 15, 1995 |
| 5434724 |
Method and apparatus for the high speed driving of a stepper motor against seek error upon power restoration in a microcomputer system |
Jul. 18, 1995 |
| 5408134 |
Sub-step pulse generating circuit using the period of a step pulse |
Apr. 18, 1995 |
| 5311380 |
Magnetic head positioning device and method |
May. 10, 1994 |
| 5264771 |
Stepping motor control system |
Nov. 23, 1993 |
| 5260634 |
Constant current driving system for a stepper motor in rotating disk |
Nov. 9, 1993 |
| 5231615 |
Carriage fixing apparatus and disk driver having such carriage fixing apparatus |
Jul. 27, 1993 |
| 5227931 |
Stepper motor head driving device accounting for hysteresis error |
Jul. 13, 1993 |
| 5182685 |
Stepper motor torque variance compensation using varied applied voltage |
Jan. 26, 1993 |
| 5177383 |
Voice coil motor |
Jan. 5, 1993 |
| 5175482 |
Stepping motor control circuit |
Dec. 29, 1992 |
| 5130868 |
Apparatus and method for positioning a transducer for recording, reproducing or erasing information on a medium |
Jul. 14, 1992 |
| 5126896 |
Recording or reproducing apparatus having a head positioning, motor power control circuit |
Jun. 30, 1992 |
| 5099368 |
Method of accessing a medium with low power consumption and a recording/reproducing apparatus for realizing the same |
Mar. 24, 1992 |
| 5083230 |
Access mechanism for magnetic disk apparatus |
Jan. 21, 1992 |
| 5079653 |
Information storage disc transducer position control system using last step damping |
Jan. 7, 1992 |
| 5073835 |
Head tracking system with memory for storing correct tracking positions |
Dec. 17, 1991 |
| 5060093 |
System for controlling displacement of a head in a disc storage unit |
Oct. 22, 1991 |
| 5041773 |
Drive circuit for stepping motor |
Aug. 20, 1991 |
| 5040084 |
Disk drive system and method |
Aug. 13, 1991 |
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