Source: http://www.google.com/patents/US5600515?dq=7,403,220
Timestamp: 2017-02-20 21:08:28
Document Index: 140127691

Matched Legal Cases: ['art 2', 'art 4', 'art 2', 'art 2', 'art 2', 'art 2']

Patent US5600515 - Sliding type magnetic head assembly having a spherical contact surface ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA magnetic head assembly used for an information storage medium including a sliding surface according to the present invention includes a magnetic-field generation means having a magnetic pole and for giving a magnetic field to the information storage medium; a slider means coupled with the magnetic-field...http://www.google.com/patents/US5600515?utm_source=gb-gplus-sharePatent US5600515 - Sliding type magnetic head assembly having a spherical contact surface offset from a magnetic poleAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS5600515 APublication typeGrantApplication numberUS 08/267,876Publication dateFeb 4, 1997Filing dateJun 28, 1994Priority dateJun 30, 1993Fee statusLapsedAlso published asDE69420208D1, DE69420208T2, EP0632435A2, EP0632435A3, EP0632435B1Publication number08267876, 267876, US 5600515 A, US 5600515A, US-A-5600515, US5600515 A, US5600515AInventorsOsamu Mizuno, Tohru Nakamura, Hideki AikohOriginal AssigneeMatsushita Electric Industrial Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (16), Non-Patent Citations (1), Referenced by (3), Classifications (16), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetSliding type magnetic head assembly having a spherical contact surface offset from a magnetic pole
It is preferable that the center yoke top 7b is generally long enough in the y-axis direction to cover a tracking range of an actuator for the objective lens 11. In addition, it is preferable that the center yoke top 7b is located in the vicinity of the origin O which is a standard contact point.. The reason is that the shift in the distance, which is e distance in the z-axis direction, between the center yoke top 7b and the recording layer 1b becomes smaller as the distance between the center yoke top 7b and the origin O is smaller, when the magneto-optical disk 1 is inclined. In this case, a stable recording operation can be performed. Accordingly, it is optimum that the center yoke top 7b is located as shown in FIG. 3. The simulation based on this arrangement has revealed that a range of shift in the distance between the center yoke top 7b and the recording layer 1b can be maintained at approximately ±60 μm under the worst condition. FIG. 3 also shows that the center yoke top 7b can be located in a zone of 0.4 mm to 1.4 mm from the peak 0 of the spherical surface 2b (i.e., origin O).
Initially, when the spherical surface 2b of the magnetic head assembly, as shown in FIG. 5, is let down on the sliding film 1d of the magneto-optical disk 1 while rotating in the direction of the arrow R (see FIG. 1A), the rigid part 2c comes apart from the hook part 4b, whereby the blade spring 3 is deformed to have a configuration as shown in FIG. 1B. Since the slider part 2a is positioned as shown in FIG. 4 if no external force is applied, a sufficient pressing force FB (=amount of the shift of the slider part 2a×the spring constant of the blade spring 3) acts on the spherical surface 2b via the rigid part 2c and the slider part 2a.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS4058846 *Jun 21, 1976Nov 15, 1977International Business Machines CorporationGrounded transducer for magnetic record disksUS4167765 *Jul 27, 1978Sep 11, 1979International Business Machines CorporationTransducer suspension mount apparatusUS4734805 *Feb 11, 1985Mar 29, 1988Nec CorporationMagnetic head supporting mechanismUS5006946 *Apr 19, 1989Apr 9, 1991Tdk CorporationFlexible polymeric resinous magnetic head supporting deviceUS5185683 *Jan 18, 1991Feb 9, 1993Hutchinson Technology, Inc.Suspension arm mounting assemblyUS5333085 *Oct 13, 1993Jul 26, 1994Seagate Technology, Inc.Read/write gimbal with limited range of motionUS5347414 *Mar 26, 1991Sep 13, 1994Matsushita Electric Industrial Co., Ltd.Magnetic disk drive with a controllably positioned floating magnetic headUS5359481 *Apr 26, 1993Oct 25, 1994Minebea Co., Ltd.Composite type floating magnetic headUS5471439 *Jan 26, 1993Nov 28, 1995Sharp Kabushiki KaishaMagnetic head device with slidable and adjustable magnetic headEP0072389A2 *Mar 18, 1982Feb 23, 1983International Business Machines CorporationSelf-loading magnetic head air bearing sliderEP0129336A1 *May 17, 1984Dec 27, 1984Minnesota Mining And Manufacturing CompanyTransducer-slider assembly having contoured air-bearing surfaceEP0549144A2 *Nov 27, 1992Jun 30, 1993Sony CorporationMagnetic head for magnetooptical recordingJPH02235213A * Title not availableJPH03185618A * Title not availableJPH04263148A * Title not availableJPH05144115A * Title not available* Cited by examinerNon-Patent CitationsReference1 *Search Report for European Appl. 94110081.0, mailed Jan. 17, 1995.* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS6426850 *Jun 28, 1999Jul 30, 2002Matsushita Electric Industrial Co., Ltd.Converter support structureUS6698087 *Dec 12, 2000Mar 2, 2004Koninklijke Philips Electronics N.V.Actuator having three bridgesUS7525767Feb 21, 2006Apr 28, 2009Hitachi Global Storage Technologies Netherlands B.V.System for low profile termination with robust alignment for wireless suspension in hard disk drive* Cited by examinerClassifications U.S. Classification369/13.17, 360/246.1, G9B/5.202, G9B/5.149, 360/110, 360/122, G9B/11.046International ClassificationG11B5/48, G11B5/58, G11B11/105Cooperative ClassificationG11B5/4813, G11B11/1058, G11B5/58European ClassificationG11B5/48A1, G11B11/105G4, G11B5/58Legal EventsDateCodeEventDescriptionJun 28, 1994ASAssignmentOwner name: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MIZUNO, OSAMU;NAKAMURA, TOHRU;AIKOH, HIDEKI;REEL/FRAME:007044/0701Effective date: 19940621Jul 24, 2000FPAYFee paymentYear of fee payment: 4Aug 25, 2004REMIMaintenance fee reminder mailedFeb 4, 2005LAPSLapse for failure to pay maintenance feesApr 5, 2005FPExpired due to failure to pay maintenance feeEffective date: 20050204RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services