[특허]Actuator arm assembly having bearing gap formed between bearing outer race and pivot sleeve for mitigating torque ripple on actuator arm in a disk drive

[미국특허] Actuator arm assembly having bearing gap formed between bearing outer race and pivot sleeve for mitigating torque ripple on actuator arm in a disk drive 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G11B-021/08
출원번호	US-0728625 (2000-11-30)
발명자 / 주소	Lin, Chen-Chi Oveyssi, Kamran Casey, Shawn E.
출원인 / 주소	Western Digital Technologies, Inc.
대리인 / 주소	Kim, Esq., W. ChrisShara, Esq., Milad G.Stetina Brunda Garred & Brucker
인용정보	피인용 횟수 : 54 인용 특허 : 6

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An aspect of the invention can be regarded as an actuator arm assembly which includes an actuator arm having an actuator bore. The actuator arm is configured to pivot about an axis of rotation. The actuator bore has pivot sleeve contact areas. The actuator arm assembly includes a pivot cartridge which includes a pivot sleeve which is formed to exert compressive force radially from the axis of rotation. The pivot sleeve is formed to locally deform radially relative to the axis of rotation adjacent the pivot sleeve contact areas. The pivot cartridge includes a bearing outer race. The pivot cartridge includes a bearing gap formed between the bearing outer race and the pivot sleeve for inhibiting transfer of force between the pivot sleeve and the bearing outer race. at said some locations the final burst pattern is carried out by using the first burst pattern, the second burst pattern and the third burst pattern. 4. The method set forth in claim 3 comprising the further step of self-writing at said some track locations of the storage surface a fourth servo burst pattern having circumferential burst edges located radially intermediate circumferential edges of the first servo burst pattern and the third servo burst pattern, and wherein the step of self-writing at said some locations the final burst pattern is carried out by using the first burst pattern, the second burst pattern, the third burst pattern and the fourth burst pattern. 5. The method set forth in claim 1 wherein the step of servowriting the first servo burst pattern is carried out at a servowriter station located within a clean room environment, and wherein the step of self-writing the final servo burst pattern is carried out at a location outside of the clean room environment. 6. The method set forth in claim 5 comprising a further step of using the special circuit board to carry out the self-writing step during self-scan at a self-scan station outside of the clean room environment. 7. The method set forth in claim 1 comprising a further step of downloading self-servowriting control routines to the special circuit board prior to the self-writing step. 8. The method set forth in claim 1 comprising further steps of servo-writing at least one reference track by using the servowriter and self-reading the at least one reference track to determine characteristics of the head-disk assembly. 9. The method set forth in claim 8 wherein the step of servowriting at least one reference track comprises servo-writing a plurality of reference tracks across a radial extent of a storage disk of the head-disk assembly and wherein the step of self-reading the at least one reference track comprises the step of self-reading the plurality of reference tracks. 10. The method set forth in claim 8 wherein the head-disk assembly includes a rotary actuator head positioner for positioning a dual element read/write head having a read element with a width less than a write element, such that the read element manifests a positional offset relative to the write element as a function of angular position of the rotary actuator head positioner, and wherein the step of determining characteristics includes the step of determining reader to writer offset as a function of angular position. 11. The method set forth in claim 1 wherein a final servo sector burst pattern of the head-disk assembly includes the first burst pattern and the final burst pattern. 12. The method set forth in claim 11 wherein the final servo sector burst pattern of the head-disk assembly includes an untrimmed six burst pattern comprising untrimmed bursts A, B, C of the first pattern and untrimmed bursts D, E, and F, each burst being radially offset from every other burst within the burst pattern. 13. The method set forth in claim 12 wherein each data track is nominally centered on the storage surface in accordance with the relation: {(C-A)-(D-E)} =0. 14. The method set forth in claim 1 wherein a head of the drive includes a write element and a read element, wherein the write element has a writing width approximately two-thirds of a track width and wherein the final servo sector burst pattern of the head-disk assembly includes an untrimmed six burst pattern comprising untrimmed bursts A, B, C, D, E, and F, each burst being radially offset from every other burst within the burst pattern by one-third track pitch. 15. The method set forth in claim 14 wherein untrimmed bursts A, B and C are recorded at the servo-writing step, and wherein the bursts D, E and F are recorded at the self-writing step. 16. The method set forth in claim 15 comprising the further step of determining write element to read element offset and wherein the drive self-writes the final servo burst pattern at one-third track pitch

이 특허에 인용된 특허 (6) 인용/피인용 타임라인 분석

Jabbari Iraj (Santa Clara County CA), Actuator arm with a steel sleeve for thermal off track compensation.
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Yajima Hirotaka (Komoro JPX), Bearing.
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Blanks John B. (Edmond OK), Compliant pivot mechanism for a rotary actuator.
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Sri-Jayantha Muthuthamby ; Sharma Arun ; Kumar Suresh ; Khanna Vijayeshwar, Direct access storage device having compound actuator bearing system.
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Edwards John Robert (Mountain View CA) Garbarino Jon Matthew (San Jose CA), Disk drive having elastomeric interface in pivot bearing assembly.
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Butler Walter Wayne ; Edwards John Robert, Pivot bearing assembly providing damping for unit-to-unit consistency.
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이 특허를 인용한 특허 (54) 인용/피인용 타임라인 분석

Nguyen, Daniel T.; Sill, Kevin R., Actuator pivot assembly including a bonding adhesive barrier configured to reduce contamination.
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Chen, Yih-Jen D.; McNab, Robert J., Apparatus for manufacturing piezoelectric actuators.
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Nguyen, Daniel T.; Watson, Scott E.; Liem, Andre Y.; Garbarino, Jonathan M.; Weiher, Joshua P., Coined VCM tab to limit cover deflection under pinch load.
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Tian, Jifang; Li, Hongqi; Flynn, William; Hu, Xiaoping; Obregon, Francisco, Devices and methods for system-level disk drive vibration and shock testing.
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Lee, Yu-Min; Zheng, Hao; Griggs, Ian; Tran, Gregory, Disk drive actuator having a radially stepped pivot bore.
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Larson, Nils E.; Liebman, Michael K.; Garbarino, Jonathan M., Disk drive actuator rotary bearing attachment with cam member.
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Mani Biswas, Mousumi, Disk drive filter including fluorinated and non-fluorinated nanopourous organic framework materials.
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Gustafson, John R.; Patel, Mukesh, Disk drive having a conformal peripheral foil seal having an opening covered by a central metal cap.
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Horasart, Theerapong; Bupphasawan, Meatasit; Chaiboon, Chinorot, Disk drive having a stationary plate between disks with grooves adjacent fastener holes.
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Smyth, Nicholas D.; Myers, David K., Disk drive having a top cover channel vented to a central cavity via a hole through a bottom land.
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Smyth, Nicholas D.; Myers, David K., Disk drive having a top cover channel vented to a central cavity via a peripheral clearance gap.
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Pan, Tzong-Shii; Chen, Yih-Jen Dennis; Shum, Wing Chun, Disk drive head gimbal assembly having a flexure tail with a dielectric layer that has regions of lesser thickness.
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Pan, Tzong-Shii; Zhang, Cliff, Disk drive head stack assembly having a flexible printed circuit with bond pads having reduced capacitance.
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Chen, Yih-Jen Dennis; Liu, Yanning; Teo, Kia Moh, Disk drive head suspension tail with a noble metal layer disposed on a plurality of structural backing islands.
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Chen, Yih-Jen Dennis; Liu, Yanning; Teo, Kia Moh, Disk drive head suspension tail with a noble metal layer disposed on a plurality of structural backing islands.
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Chen, Yih-Jen Dennis; Liu, Yanning; Teo, Kia Moh, Disk drive head suspension tail with ground pad outside of bonding region.
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Chen, Yih-Jen D.; Pan, Tzong-Shii, Disk drive head suspension tail with stiffened edge alignment features.
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Chen, Yih-Jen D.; Pan, Tzong-Shii, Disk drive head suspension tail with stiffened edge alignment features.
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Chen, Yih-Jen Dennis; Pan, Tzong-Shii, Disk drive head suspension with a dual dimple and a flexure tongue with a piezoelectric microactuator.
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Kloeppel, Klaus; Ilagan, Ronald G.; Nguyen, Diep L., Disk drive spindle with fluid journal bearing having increased radial clearance in axial end regions.
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Pan, Tzong-Shii, Disk drive system.
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Parker, Joshua; Petersen, Frederic C.; Couture, Shawn P.; Kuniyil, Prabheesh Balakrishnan; Nykanen, Bob A., Disk drive tolerance ring with edge rounding from opposite major faces.
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Uefune, Kouki; Kouno, Takashi; Hayakawa, Takako; Ichikawa, Kazuhide, Disk drive with adhesively bonded pivot-bearing assembly.
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Sill, Kevin R.; Little, Aaron D., Disk drive with self sealing screw attachment of actuator pivot.
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Gustafson, John R.; Patel, Mukesh, Disk drive with slow acting desiccant.
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Kloeppel, Klaus, Grooved cylindrical seal with increased radial clearance for reduced cost disk drive spindle.
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Le, Lynn Bich-Quy; Hitchner, Thomas J., Hard disk drive enclosure base with a helium sealed gasket.
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Le, Lynn Bich-Quy; Hitchner, Thomas J., Hard disk drive enclosure base with feed through flexure design and accompanying flexure.
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Shum, Wing Chun; Liu, Yanning; Scura, John E., Head gimbal assembly having a flexure tail with cover layer standoff islands.
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Pan, Tzong-Shii; Ho, Shufun, Head stack assembly with a flexible printed circuit having a mouth centered between arms.
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Pan, Tzong-Shii, Head suspension having a flexure tail with a covered conductive layer and structural layer bond pads.
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Casey, Shawn E.; Tian, Jifang; Campbell, Tegan; Li, Hongqi; Flynn, William, Information storage device with a damping insert sheet between a housing bay and a disk drive.
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Hanke, Frederick J., Information-storage device including an oxygen absorbing device.
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Davidson, Marc; Myers, David K.; Willis, Terrance J., Magnetic head separator connected to a ramp.
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Davidson, Marc; Myers, David K.; Willis, Terrance J., Magnetic head separator fin material to prevent particulate contamination on slider.
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Novotny, Vlad; Berding, Keith R., Magnetic recording drives with active photocatalytic filtration.
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Perlas, Joseph A.; Vangal-Ramamurthy, Jambunathan, Method of imbalance correction using a grooved disk clamp.
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Pan, Tzong-Shii; Magsombol, Fernando A., Method of manufacturing a disk drive head gimbal assembly having a flexure tail with folded bond pads.
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Koyama,Toshisada, Pivot assembly for hard disk drive use.
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Schmidt, Ryan John; Parsy, Philippe Jacques; Brink, Damon Douglas; Dexter, David Django; Gronemann, Sven, Pivot attach method for disk drive actuator using taper lock shims.
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Nguyen, Diep L.; Ilagan, Ronald G.; Kloeppel, Klaus, Rotary spindle having a disk clamp bottom land facing and in contact with a shaft top land.
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Watson, Scott E.; Lee, Yau-Shing; Hitchner, Thomas J.; Myers, David K., Slim form factor disk drive comprising disk drive enclosure having an insular raised region.
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Davidson, Marc; Krishnan, Varuvadivelan; Tan, Siu Ken; Kok, Kin Lim, Sloping transition on a ramp of a hard disk drive.
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Dougherty, Mitchell D., Spindle motor magnet diameter increase above head plane.
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Smyth, Nicholas D.; Nguyen, Daniel T.; Myers, David K., Storage device with a cover supporting portion.
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Smyth, Nicholas D.; Nguyen, Daniel T.; Myers, David K., Storage device with a cover supporting portion.
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Liu, Yanning; Shum, Wing C.; Scura, John E., Suspension assembly having a microactuator electrically connected to a gold coating on a stainless steel surface.
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Liu, Yanning; Shum, Wing Chun; Scura, John E., Suspension assembly having a microactuator electrically connected to a gold coating on a stainless steel surface.
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Seymour, Mark S.; Dougherty, Mitchell D.; Banshak, Jr., Walter G.; Hales, Geoffrey A., Suspension clamp for clamping a disk drive suspension to an actuator arm.
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Tafreshi, Shahriar A.; Lee, Yu-Min, Tamper-evident seals having adhesive-free areas to minimize rework time.
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Heo, Baekho; Weiher, Joshua P., Threaded disk clamping element with step on disk contact surface.
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Tian, Jifang; Yang, Jian; Yang, Qiang, Ultra-thin HDD embedded disk clamp design.
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Larson, Nils E.; Liebman, Michael K.; Garbarino, Jonathan M., Wedge based fastener.
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Larson, Nils E.; Liebman, Michael K.; Garbarino, Jonathan M., Wedge based fastener.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Actuator arm assembly having bearing gap formed between bearing outer race and pivot sleeve for mitigating torque ripple on actuator arm in a disk drive 원문보기

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이 특허에 인용된 특허 (6) 인용/피인용 타임라인 분석

이 특허를 인용한 특허 (54) 인용/피인용 타임라인 분석

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[미국특허] Actuator arm assembly having bearing gap formed between bearing outer race and pivot sleeve for mitigating torque ripple on actuator arm in a disk drive 원문보기

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대표청구항 ▼

연구과제 타임라인

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이 특허에 인용된 특허 (6) 인용/피인용 타임라인 분석

이 특허를 인용한 특허 (54) 인용/피인용 타임라인 분석

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