Patents by Inventor Chen-Hsiung Lee
Chen-Hsiung Lee has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9673622Abstract: The linear controlling module of the present invention includes a controlling switch, a first resistor, a capacitor, and a second resistor. The controlling switch is electrically connected to a controlling signal outputting terminal of a power supplying device, the first resistor is electrically connected to the controlling switch, the capacitor is electrically connected to a electric power outputting terminal of the power supplying device and the first resistor, and the second resistor is electrically connected to the switch component of the power supplying device, the first resistor, and the capacitor. The switch component is electrically connected to an electric power outputting terminal.Type: GrantFiled: July 28, 2014Date of Patent: June 6, 2017Assignee: Chicony Power Technology Co., Ltd.Inventors: Tzu-Hung Wang, Chen-Hsiung Lee, Chang-Cheng Hsiao
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Patent number: 9590415Abstract: An output short circuit protecting device electrically connected to a power supplying device includes a first output short circuit protecting unit. The first output short circuit protecting unit includes a sensing unit, a comparing unit, a judging element, and a latching unit. The sensing unit is electrically connected to a switching unit, a first outputting resistor, and a second outputting resistor of the power supplying device. The comparing unit is electrically connected to the sensing unit. The judging element is electrically connected to the comparing unit, and a controller and a signal-controlling terminal of the power supplying device. The latching unit is electrically connected to the judging element and the signal-controlling terminal.Type: GrantFiled: September 3, 2014Date of Patent: March 7, 2017Assignee: CHICONY POWER TECHNOLOGY CO., LTD.Inventors: Tzu-Hung Wang, Yung-Hung Hsiao, Chen-Hsiung Lee, Cheng-Chang Hsiao
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Publication number: 20160064918Abstract: An output short circuit protecting device electrically connected to a power supplying device includes a first output short circuit protecting unit. The first output short circuit protecting unit includes a sensing unit, a comparing unit, a judging element, and a latching unit. The sensing unit is electrically connected to a switching unit, a first outputting resistor, and a second outputting resistor of the power supplying device. The comparing unit is electrically connected to the sensing unit. The judging element is electrically connected to the comparing unit, and a controller and a signal-controlling terminal of the power supplying device. The latching unit is electrically connected to the judging element and the signal-controlling terminal.Type: ApplicationFiled: September 3, 2014Publication date: March 3, 2016Inventors: Tzu-Hung WANG, Yung-Hung HSIAO, Chen-Hsiung LEE, Cheng-Chang HSIAO
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Publication number: 20160028322Abstract: The linear controlling module of the present invention includes a controlling switch, a first resistor, a capacitor, and a second resistor. The controlling switch is electrically connected to a controlling signal outputting terminal of a power supplying device, the first resistor is electrically connected to the controlling switch, the capacitor is electrically connected to a electric power outputting terminal of the power supplying device and the first resistor, and the second resistor is electrically connected to the switch component of the power supplying device, the first resistor, and the capacitor. The switch component is electrically connected to an electric power outputting terminal.Type: ApplicationFiled: July 28, 2014Publication date: January 28, 2016Inventors: Tzu-Hung WANG, Chen-Hsiung LEE, Chang-Cheng HSIAO
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Patent number: 6920012Abstract: A method and apparatus for providing magnetic wear debris collection for an air bearing of a spindle motor in a hard disk drive is disclosed. A magnetic ring is provided near one end of the journal bearing forming an air bearing. In addition, the mating surface of the air bearing is paramagnetic or ferromagnetic material. The magnetic ring, acting as a debris collector, collects debris from the air bearing to prevent deterioration of the air journal bearing. The journal bearing includes a mating surface. The mating surface may be of a paramagnetic or ferromagnetic material. A thrust bearing is provided to axially support the hub. The thrust bearing may be an oil bearing or an air bearing.Type: GrantFiled: June 20, 2003Date of Patent: July 19, 2005Assignee: Hitachi Global Storage Technologies Netherlands BVInventor: Chen-Hsiung Lee
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Patent number: 6815850Abstract: A spindle design for a hard disk drive assembly constructed in accordance with the present invention includes a significantly large gap between the rotating, ferromagnetic hub with its permanent magnet rotor and the rotating sleeve of the fluid bearing journal member. The large gap may be filled with a medium, such as air, or a non-permeable material. The large gap is preferably on the order of several hundred microns. Because of the large gap, the magnetic flux leakage from the rotating hub members and sleeve into the stationary shaft at the center of the spindle is negligible. Consequently, iron loss in the shaft caused by magnetic flux leakage into the shaft is reduced to acceptable noise levels.Type: GrantFiled: July 10, 2001Date of Patent: November 9, 2004Assignee: International Business Machines CorporationInventors: David W. Albrecht, Chen-hsiung Lee
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Publication number: 20040000827Abstract: A method and apparatus for providing magnetic wear debris collection for an air bearing of a spindle motor in a hard disk drive is disclosed. A magnetic ring is provided near one end of the journal bearing forming an air bearing. In addition, the mating surface of the air bearing is paramagnetic or ferromagnetic material. The magnetic ring, acting as a debris collector, collects debris from the air bearing to prevent deterioration of the air journal bearing. The journal bearing includes a mating surface. The mating surface may be of a paramagnetic or ferromagnetic material. A thrust bearing is provided to axially support the hub. The thrust bearing may be an oil bearing or an air bearing.Type: ApplicationFiled: June 20, 2003Publication date: January 1, 2004Applicant: International Business Machines CorporationInventor: Chen-Hsiung Lee
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Patent number: 6603632Abstract: A method and apparatus for providing magnetic wear debris collection for an air bearing of a spindle motor in a hard disk drive is disclosed. A magnetic ring is provided near one end of the journal bearing forming an air bearing. In addition, the mating surface of the air bearing is paramagnetic or ferromagnetic material. The magnetic ring, acting as a debris collector, collects debris from the air bearing to prevent wear debris form reaching the head/disk interface, which can lead to a head crash. The journal bearing includes a mating surface. The mating surface may be of a paramagnetic or ferromagnetic material. A thrust bearing is provided to axially support the hub. The thrust bearing may be an oil bearing or an air bearing.Type: GrantFiled: March 7, 2000Date of Patent: August 5, 2003Assignee: International Business Machines CorporationInventor: Chen-Hsiung Lee
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Patent number: 6524006Abstract: There is provided a disk drive motor including a shaft, a thrust plate, a bearing housing positioned about the shaft, and a combination of groove sets on either the shaft or the bearing housing. The asymmetrical grooves are oriented to pump fluid in a specific direction during rotation of the housing around the shaft. Vents are also positioned to allow unwanted gases to escape.Type: GrantFiled: April 11, 2000Date of Patent: February 25, 2003Assignee: International Business Machines CorporationInventor: Chen-hsiung Lee
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Publication number: 20030011251Abstract: A spindle design for a hard disk drive assembly constructed in accordance with the present invention includes a significantly large gap between the rotating, ferromagnetic hub with its permanent magnet rotor and the rotating sleeve of the fluid bearing journal member. The large gap may be filled with a medium, such as air, or a non-permeable material. The large gap is preferably on the order of several hundred microns. Because of the large gap, the magnetic flux leakage from the rotating hub members and sleeve into the stationary shaft at the center of the spindle is negligible. Consequently, iron loss in the shaft caused by magnetic flux leakage into the shaft is reduced to acceptable noise levels.Type: ApplicationFiled: July 10, 2001Publication date: January 16, 2003Applicant: International Business Machines CorporationInventors: David W. Albrecht, Chen-hsiung Lee
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Patent number: 6339515Abstract: A bearing structure for a spindle motor is disclosed. The bearing structure provides a fluid bearing seal and support structure that may simultaneously addresses the problems of preventing oil leakage, of maintaining the bearing integrity under shock, of reducing oil evaporation and of minimizing distortion of the active bearing surface. The bearing structure includes a thrust plate coupled to a shaft and a bearing plate and load plate coupled to a sleeve, wherein the load plate urges the bearing plate towards the thrust plate, and wherein an adhesive is interposed between the load plate and the thrust plate. The adhesive may be an UV epoxy. The sleeve is operatively coupled to a stator, and the stator rotates the sleeve upon receiving a drive signal. The bearing further includes a diffusion barrier disposed between the sleeve and the stator. A second diffusion barrier is disposed between the load plate and the shaft.Type: GrantFiled: May 18, 1999Date of Patent: January 15, 2002Assignee: International Business Machines CorporationInventors: Chen-Hsiung Lee, Holavanahally Seshachar Nagaraj, Neal Bertram Schirle
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Publication number: 20010053042Abstract: A bearing structure for a spindle motor is disclosed. The bearing structure provides a fluid bearing seal and support structure that may simultaneously addresses the problems of preventing oil leakage, of maintaining the bearing integrity under shock, of reducing oil evaporation and of minimizing distortion of the active bearing surface. The bearing structure includes a thrust plate coupled to a shaft and a bearing plate and load plate coupled to a sleeve, wherein the load plate urges the bearing plate towards the thrust plate, and wherein an adhesive is interposed between the load plate and the thrust plate. The adhesive may be an UV epoxy. The sleeve is operatively coupled to a stator, and the stator rotates the sleeve upon receiving a drive signal. The bearing further includes a diffusion barrier disposed between the sleeve and the stator. A second diffusion barrier is disposed between the load plate and the shaft.Type: ApplicationFiled: May 18, 1999Publication date: December 20, 2001Inventors: CHEN-HSIUNG LEE, HOLAVANAHALLY SESHACHAR NAGARAJ, NEAL BERTRAM SCHIRLE
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Patent number: 6236535Abstract: The present disclosure relates to a spindle motor having a shaft defining an axial bore that extends completely through the length of the shaft. At least a portion of the axial bore defines a fluid reservoir. A radial passageway extends radially from the fluid reservoir to an exterior surface of the shaft. The spindle motor also includes a pin that seals one end of the axial bore, and a plug that seals an opposite end of the axial bore. The motor further includes a rotor member that is rotatably mounted on the shaft. A bearing fluid forms a hydrodynamic bearing between the exterior surface of the shaft and the rotor member. The bearing fluid at least partially fills the fluid reservoir and the radial passageway.Type: GrantFiled: July 28, 1998Date of Patent: May 22, 2001Assignee: International Business Machines CorporationInventors: Larry Joe Gilliland, Chen-Hsiung Lee
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Patent number: 6199425Abstract: A device for testing the take off speed of a thrust bearing in a disk drive spindle motor is disclosed. The device has a stationary torsion transducer that is used to support a drive shaft of the spindle motor. A load motor located adjacent to the transducer rotates the motor about the shaft while applying a radial load to the spindle motor through a belt. The load motor is attached to a linear stage which generates selected radial loads. In one version, the device also uses a ring magnet to attract the housing of spindle motor. The magnetic attraction imposes an axial force on the spindle motor and an equal reactive load on the thrust bearing. The axial load is such that the take off speed for the thrust bearing is much greater than that for the journal bearings. Under these conditions, the friction torque is dominated by the thrust bearing so that an accurate assessment of its quality may be assessed. As an alternative to the magnet, air jets may be used to apply a similar axial load to the thrust bearing.Type: GrantFiled: July 28, 1999Date of Patent: March 13, 2001Assignee: International Business Machines CorporationInventor: Chen-Hsiung Lee
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Patent number: 6173234Abstract: The method for determining the sufficiency of fluid in a hydrodynamic fluid bearing motor involves making a first determination of a range of fluid bearing fly-heights for motors having a sufficient quantity of fluid within the hydrodynamic fluid bearing, and for motors having an insufficient quantity of fluid within the hydrodynamic fluid bearing. Thereafter, the fly-height of a particular hydrodynamic fluid bearing motors can be determined and compared with the range of hydrodynamic fluid bearing fly-heights to provide a determination of the sufficiency of fluid within the particular hydrodynamic fluid bearing motor. Determining the fly-height of a particular hydrodynamic fluid bearing motor involves the utilization of non-contact displacement probes that generate a first signal indicative of the displacement of a rotating component of the bearing at a time when the component is rotating at a maximum fly-height.Type: GrantFiled: August 5, 1998Date of Patent: January 9, 2001Assignee: International Business Machines CorporationInventor: Chen-Hsiung Lee
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Patent number: 6071014Abstract: The present disclosure relates to a spindle motor including a shaft having an outer circumferential surface. The spindle motor also includes a thrust plate fixedly connected to the shaft. The thrust plate projects radially outward from the outer circumferential surface of the shaft and includes top and bottom surfaces. The spindle motor also includes a hub assembly mounted on the shaft. The hub assembly is adapted for mounting a storage disk. The spindle motor further includes a liquid hydrodynamic bearing and an aerodynamic bearing. The liquid hydrodynamic bearing is formed along the top and bottom surfaces of the thrust plate and is adapted for transferring loads in an axial direction relative to the shaft. The aerodynamic bearing is formed along a portion of the hub assembly and is adapted for transferring loads in a radial direction relative to the shaft.Type: GrantFiled: December 30, 1998Date of Patent: June 6, 2000Assignee: International Business Machines CorporationInventors: Chen-Hsiung Lee, James Francis Sullivan
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Patent number: 5957589Abstract: A bearing structure for a spindle motor is disclosed. The bearing structure provides a fluid bearing seal and support structure that may simultaneously addresses the problems of preventing oil leakage, of maintaining the bearing integrity under shock, of reducing oil evaporation and of minimizing distortion of the active bearing surface. The bearing structure includes a thrust plate coupled to a shaft and a bearing plate and load plate coupled to a sleeve, wherein the load plate urges the bearing plate towards the thrust plate, and wherein an adhesive is interposed between the load plate and the thrust plate. The adhesive may be an UV epoxy. The sleeve is operatively coupled to a stator, and the stator rotates the sleeve upon receiving a drive signal. The bearing further includes a diffusion barrier disposed between the sleeve and the stator. A second diffusion barrier is disposed between the load plate and the shaft.Type: GrantFiled: December 10, 1997Date of Patent: September 28, 1999Assignee: International Business Machine CorporationInventors: Chen-Hsiung Lee, Holavanahally Seshachar Nagaraj, Neal Bertram Schirle
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Patent number: 5958474Abstract: A process for preparing food flavor precursors which includes enzymatically hydrolyzing fruit pulp fibers with a pectolytic enzyme and a process for the preparation of a food flavor which includes mixing the ingredients of the food flavor with from 1 to 5% of the food flavor precursor thus prepared.Type: GrantFiled: August 21, 1996Date of Patent: September 28, 1999Assignee: Nestec S.A.Inventors: Eldon Chen-Hsiung Lee, Elaine R. Wedral
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Patent number: 5901013Abstract: A vent is disclosed for a screw mounted support shaft of a fluid dynamic bearing for a spindle of a magnetic disk file. The support shaft for mounting a spindle bushing has an axial hollow center internally threaded at one end, and has upper and lower bearing journals for rotatably mounting the spindle bushing with a fluid lubricant. The bearing journals are separated by a recess having a vent passage between the recess and hollow center. A screw is threaded through the base plate or cover into the threaded end of the support shaft, mounting the support shaft to the base plate or cover. An air vent passage, such as a slit is provided axially either in the threaded end of the hollow center of the support shaft or in the screw, and radially across the end of the support shaft so the air bleed passage extends from the hollow center externally of the support shaft.Type: GrantFiled: August 11, 1997Date of Patent: May 4, 1999Assignee: International Business Machines CorporationInventors: Chen-hsiung Lee, Holavanahally S. Nagaraj, Neal Bertram Schirle
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Patent number: 5780089Abstract: A flavor composition comprising a complex of a pyrolyzed fat/oil flavor with a gelantinized amylose or a blend of the complex with a protein hydrolyzate as well as foodstuffs containig these flavor compositions.Type: GrantFiled: May 3, 1996Date of Patent: July 14, 1998Assignee: Nestec S.A.Inventor: Eldon Chen-Hsiung Lee