Patents by Inventor Wun-Chang Shih
Wun-Chang Shih 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: 11371520Abstract: A fluid dynamic-pressure bearing set for a fan includes a casing having a hollow inner space; a seat integrally formed with the casing; the seat including a lower plate, and a hollow cylinder extended from the lower plate of the seat; a friction sheet being installed on the lower plate of the seat; a bearing being installed around an inner periphery of the cylinder; a motor coil installed around an outer periphery of the cylinder; a rotary shaft installed in an axial center of the bearing; and a fan blade set installed at an upper portion of the rotary shaft; and wherein a recess is formed on the lower plate of the seat and does not penetrate the bottom of the seat; and the recess is positioned between the friction sheet and an inner wall of the seat.Type: GrantFiled: July 21, 2020Date of Patent: June 28, 2022Inventor: John Wun-Chang Shih
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Publication number: 20220025895Abstract: A fluid dynamic-pressure bearing set for a fan includes a casing having a hollow inner space; a seat integrally formed with the casing; the seat including a lower plate, and a hollow cylinder extended from the lower plate of the seat; a friction sheet being installed on the lower plate of the seat; a bearing being installed around an inner periphery of the cylinder; a motor coil installed around an outer periphery of the cylinder; a rotary shaft installed in an axial center of the bearing; and a fan blade set installed at an upper portion of the rotary shaft; and wherein a recess is formed on the lower plate of the seat and does not penetrate the bottom of the seat; and the recess is positioned between the friction sheet and an inner wall of the seat.Type: ApplicationFiled: July 21, 2020Publication date: January 27, 2022Inventor: John Wun-Chang Shih
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Publication number: 20220018395Abstract: A liquid guiding structure for a fluid dynamic pressure bearing, comprising: a fluid dynamic pressure bearing having an inner recess chamber and a liquid guiding trench which is formed between two sides of the inner recess chamber so as to form a circular close liquid guiding structure; wherein the liquid guiding trench includes at least two small V shape paths and at least one large V shape path; the large V shape path is larger than the small V shape paths and is located between the at least two small V shape paths. First angles at tip ends of the at least two small V shape paths are equal. A second angle between connections of the small V shape path and a respective large V shape path is larger than the first angle at tip ends of the at least two small V shape paths.Type: ApplicationFiled: July 14, 2020Publication date: January 20, 2022Inventor: John Wun-Chang Shih
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Patent number: 11209047Abstract: A liquid guiding structure for a fluid dynamic pressure bearing, comprising: a fluid dynamic pressure bearing having an inner recess chamber and a liquid guiding trench which is formed between two sides of the inner recess chamber so as to form a circular close liquid guiding structure; wherein the liquid guiding trench includes at least two small V shape paths and at least one large V shape path; the large V shape path is larger than the small V shape paths and is located between the at least two small V shape paths. First angles at tip ends of the at least two small V shape paths are equal. A second angle between connections of the small V shape path and a respective large V shape path is larger than the first angle at tip ends of the at least two small V shape paths.Type: GrantFiled: July 14, 2020Date of Patent: December 28, 2021Inventor: John Wun-Chang Shih
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Patent number: 10514061Abstract: A linear moving bearing, comprising: a retaining portion having at least one receiving chambers at lateral sides thereof; each receiving chamber being installed with at least one set of sliding track which is formed by two round rods; each of receiving chamber formed with two stop walls at an upper and lower ends of an opening of the receiving chamber; the stop walls serving to retain the round rods in the receiving chamber; each of the set of the sliding track resisting against a sliding rod so that the round rod being slidable along the sliding track. The stop walls are screwed or buckled to an upper and a lower end of a lateral wall aside the opening of the receiving chamber. The sliding rod has a sharp angle resists against a middle area between the two round rods of a set of the sliding track.Type: GrantFiled: May 23, 2018Date of Patent: December 24, 2019Inventor: John Wun-Chang Shih
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Publication number: 20190360525Abstract: A linear moving bearing, comprising: a retaining portion having at least one receiving chambers at lateral sides thereof; each receiving chamber being installed with at least one set of sliding track which is formed by two round rods; each of receiving chamber formed with two stop walls at an upper and lower ends of an opening of the receiving chamber; the stop walls serving to retain the round rods in the receiving chamber; each of the set of the sliding track resisting against a sliding rod so that the round rod being slidable along the sliding track. The stop walls are screwed or buckled to an upper and a lower end of a lateral wall aside the opening of the receiving chamber. The sliding rod has a sharp angle resists against a middle area between the two round rods of a set of the sliding track.Type: ApplicationFiled: May 23, 2018Publication date: November 28, 2019Inventor: John Wun-Chang Shih
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Publication number: 20180180097Abstract: A drain proof seat of a fluid pressure bearing of a fan having a seat with a through hole for installing a fluid-pressure bearing; wherein a lower bottom of the bearing seat is formed with at least one drain-proof recess; and each drain-proof recess is a closed loop. The form of the drain-proof recess is a closed round recess, a non-round geometrical closed recess, a polygonal closed recess, or any other geometrical closed recess and all the recesses are co-centered with the through hole of the seat. Depths and widths of the drain-proof recesses are identical or not identical. Two adjacent drain-proof recesses are formed with an annular ring, and all the rings are co-centered and have identical or different width.Type: ApplicationFiled: December 26, 2016Publication date: June 28, 2018Inventor: JOHN WUN-CHANG SHIH
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Patent number: 9518607Abstract: A drain proof bearing assembly includes a seat; a cylindrical bearing being receivable in a hollow space of the seat; the bearing being formed with an axial hole; an upper opening of the axial hole of the bearing being formed with an annual recess for receiving a drain proof ring; a plurality of radial notches being formed radially on an upper surface of the bearing; an outer surface of the bearing being formed with a plurality of oil guiding trenches; by the notches, the oil guiding trenches being communicated to the annular recess; and a press plate having an inner hollow penetrating hole and receivable in the hollow spate of the seat. Thereby, the fluid is prevented from draining out along the path from the spindle to the press plate. This design is effective from various kinds of bearings, such as fluid dynamic bearings, or oil bearings, etc.Type: GrantFiled: October 6, 2014Date of Patent: December 13, 2016Inventor: John Wun-Chang Shih
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Publication number: 20160097426Abstract: A drain proof bearing assembly includes a seat; a cylindrical bearing being receivable in a hollow space of the seat; the bearing being formed with an axial hole; an upper opening of the axial hole of the bearing being formed with an annual recess for receiving a drain proof ring; a plurality of radial notches being formed radially on an upper surface of the bearing; an outer surface of the bearing being formed with a plurality of oil guiding trenches; by the notches, the oil guiding trenches being communicated to the annular recess; and a press plate having an inner hollow penetrating hole and receivable in the hollow spate of the seat. Thereby, the fluid is prevented from draining out along the path from the spindle to the press plate. This design is effective from various kinds of bearings, such as fluid dynamic bearings, or oil bearings, etc.Type: ApplicationFiled: October 6, 2014Publication date: April 7, 2016Inventor: John Wun-Chang Shih
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Publication number: 20120243812Abstract: A fluid dynamic bearing includes a body; an inner surface of the body being formed with a plurality of sawteeth trenches; each bending angle of each tooth of the sawteeth trench being selected from one of two difference values. Each sawteeth trench has eight teeth, four at the right side and four at the left side. Eight bending angles of eight teeth of one trench are selected from two kinds of different angles which are alternatively arranged. The bearing is suitable for spindles of various rotation speeds so as to generate fluid dynamic pressure and the bearing is also suitable for various rotation speeds of spindles.Type: ApplicationFiled: March 25, 2011Publication date: September 27, 2012Inventor: John Wun-Chang Shih
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Patent number: 7824115Abstract: An exemplary camera module includes a lens mount, a lens unit, a magnet unit, a printed circuit board (PCB)-based Rogowski coil and a blade spring. The PCB-based Rogowski coil is fixed around the lens unit. The PCB-based Rogowski coil establishes an induced magnetic field when an electric current is applied thereto. The induced magnetic field interacts with the magnet unit to generate a magnetic force moving the lens unit telescopically. The blade spring includes a plurality of ribs. Each rib includes a moveable end connected with the lens unit and an opposite fixed end. The moveable end moves together with the lens unit with respect to the fixed end to cause the ribs to distort and generate an elastic force. The lens unit stops at a focal position when the magnetic force and the elastic force come to a balance.Type: GrantFiled: July 22, 2008Date of Patent: November 2, 2010Assignees: Fu Zhun Precision Industry (Shen Zhen) Co., Ltd., Foxconn Technology Co., Ltd.Inventors: Wun-Chang Shih, Ching-Hsing Huang, Cheng-Fa Weng, Jen-Te Wang, Huai-Chao You, Da-Yi Wen, Biao Wang, Yun-Ming Hu
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Patent number: 7745967Abstract: A cooling fan includes a fan housing (10) having a central tube (102) extending upwardly therefrom, a bearing (40) received in the central tube, a stator (20) mounted around the central tube, a rotor (30), and a cover (50). The bearing defines a bearing hole (47) therein. The rotor includes a hub (32), a plurality of blades (34) extending outwardly from the hub, and a shaft (36) extending downwardly from the hub into the bearing hole of the bearing. The cover is mounted around the shaft and arranged on the bearing to seal a top end of the bearing. The cover is made of powders by sintering and thus has a plurality of pores to generate capillary force to absorb lubricant oil leaking out of the bearing.Type: GrantFiled: December 18, 2007Date of Patent: June 29, 2010Assignees: Fu Zhun Precision Industry (Shen Zhen) Co., Ltd., Foxconn Technology Co., Ltd.Inventors: Qiang Zhang, Zhi-Ya Yang, Wun-Chang Shih, Yi-Chyng Fang
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Patent number: 7657170Abstract: A motor structure with a built-in lens includes a motor (30), and a lens unit (50) received in the motor and driven by the motor to telescopically move along an axial thereof. An internal thread (344) is formed on an inner surface of the motor. The lens unit includes an upper portion (51) and a lower portion (54). An external thread (544) is formed on an outer surface of the lower portion of the lens unit to threadedly engage with the internal thread of the motor. A dust cover (70) is arranged on the upper portion of the lens unit and defines an opening (71) for the upper portion of the lens unit to move therethrough. The lower portion of the lens unit is limited in the cover so that the external thread is prevented from being exposed to the environment during movement of the lens unit.Type: GrantFiled: October 10, 2006Date of Patent: February 2, 2010Assignee: Foxconn Technology Co., Ltd.Inventors: Cheng-Fang Hsiao, Ching-Hsing Huang, Wun-Chang Shih
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Publication number: 20090310959Abstract: An exemplary camera module includes a lens mount, a lens unit, a magnet unit, a printed circuit board (PCB)-based Rogowski coil and a blade spring. The PCB-based Rogowski coil is fixed around the lens unit. The PCB-based Rogowski coil establishes an induced magnetic field when an electric current is applied thereto. The induced magnetic field interacts with the magnet unit to generate a magnetic force moving the lens unit telescopically. The blade spring includes a plurality of ribs. Each rib includes a moveable end connected with the lens unit and an opposite fixed end. The moveable end moves together with the lens unit with respect to the fixed end to cause the ribs to distort and generate an elastic force. The lens unit stops at a focal position when the magnetic force and the elastic force come to a balance.Type: ApplicationFiled: July 22, 2008Publication date: December 17, 2009Applicants: FU ZHUN PRECISION INDUSTRY (SHEN ZHEN) CO., LTD., FOXCONN TECHNOLOGY CO., LTD.Inventors: WUN-CHANG SHIH, CHING-HSING HUANG, CHENG-FA WENG, JEN-TE WANG, HUAI-CHAO YOU, DA-YI WEN, BIAO WANG, YUN-MING HU
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Patent number: 7625122Abstract: A fluid dynamic bearing includes a bearing member (30) axially defining an inner bearing hole therein, and a spindle shaft (20) rotatably received in the bearing hole with a bearing clearance formed between an inner periphery of the bearing member and an outer periphery of the spindle shaft. Lubricant is filled in the bearing clearance. One of the inner periphery and the outer periphery comprises a bearing surface (10) with channels formed therein. The channels form a plurality of outer communication ends (1316b) at opposite sides of the bearing surface in the axial direction of the bearing member.Type: GrantFiled: December 14, 2004Date of Patent: December 1, 2009Assignee: Hon Hai Precision Industry Co., Ltd.Inventors: Ching-Hsing Huang, Wun-Chang Shih, Hsien-Sheng Pei
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Patent number: 7599615Abstract: A motor structure with a built-in lens includes a lens mount (10), a motor (30) received in the lens mount, and a lens unit (50) received in the lens mount and driven by the motor to telescopically move along an axial thereof. The motor includes a stator (32) and a rotor (34) being rotatably received in the stator. A narrow gap is defined between an inner surface of the stator and an outer surface of the rotor. A bearing layer (36) is filled in the gap of the motor to avoid swing of the rotor during rotation thereof. The lens unit threadedly engages with the rotor, whereby when the rotor rotates, the lens unit has a linearly telescopic movement relative to the lens mount.Type: GrantFiled: August 1, 2006Date of Patent: October 6, 2009Assignee: Foxconn Technology Co., Ltd.Inventors: Cheng-Fang Hsiao, Wun-Chang Shih, Ching-Hsing Huang, Chien-Long Hong
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Publication number: 20090079303Abstract: A cooling fan includes a fan housing (10) having a central tube (102) extending upwardly therefrom, a bearing (40) received in the central tube, a stator (20) mounted around the central tube, a rotor (30), and a cover (50). The bearing defines a bearing hole (47) therein. The rotor includes a hub (32), a plurality of blades (34) extending outwardly from the hub, and a shaft (36) extending downwardly from the hub into the bearing hole of the bearing. The cover is mounted around the shaft and arranged on the bearing to seal a top end of the bearing. The cover is made of powders by sintering and thus has a plurality of pores to generate capillary force to absorb lubricant oil leaking out of the bearing.Type: ApplicationFiled: December 18, 2007Publication date: March 26, 2009Applicants: FU ZHUN PRECISION INDUSTRY (SHEN ZHEN) CO., LTD., FOXCONN TECHNOLOGY CO., LTD.Inventors: QIANG ZHANG, ZHI-YA YANG, WUN-CHANG SHIH, YI-CHYNG FANG
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Patent number: 7494283Abstract: A hydrodynamic bearing assembly (10) includes a bearing sleeve (11) defining a receiving chamber (113) therein, a bearing (12) received in the receiving chamber of the bearing sleeve, a sealing cover (15) mounted to an open end (112) of the bearing sleeve and including an enlarged section (153) adjacent to the bearing, a shaft (13) extending through the sealing cover and rotatably disposed in the bearing, on which a plurality lubricant pressure generating grooves are defined, and a lubricant retaining space (117) defined by the enlarged section of the sealing cover, an end of the bearing and the shaft for receiving lubricant therein. One of the sealing cover and the shaft defines a groove (134) therein, while the other one of the sealing cover and the shaft extends a flange (156) into the groove.Type: GrantFiled: May 25, 2006Date of Patent: February 24, 2009Assignee: Foxconn Technology Co., Ltd.Inventors: Chien-Long Hong, Ching-Hsing Huang, Wun-Chang Shih, Hsien-Sheng Pei
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Publication number: 20090035158Abstract: A cooling fan includes a fan housing (10) having a central tube (18) extending upwardly therein. A sleeve bearing (40) is received in the central tube. A stator (20) is mounted around the central tube. A rotor (30) has a shaft (36) being rotatably received in the sleeve bearing. The sleeve bearing defines a bearing hole (42) therethrough. The bearing hole (42) receives the shaft of the rotor to rotate therein. A plurality of irregular pores and at least one blind hole (44) are defined in the sleeve bearing and impregnated with lubricant oil.Type: ApplicationFiled: October 16, 2007Publication date: February 5, 2009Applicants: FU ZHUN PRECISION INDUSTRY (SHEN ZHEN) CO., LTD., FOXCONN TECHNOLOGY CO., LTD.Inventors: WUN-CHANG SHIH, QIANG ZHANG, RUI-JUN HUANG
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Patent number: 7473075Abstract: A liquid pump (100) includes a top cover (40), a back plate (50), and a spacing member (60). The spacing member is sandwiched between the top cover and the back plate, thereby dividing an interior of the liquid pump into a fluid chamber (14) and a receiving cavity (16) isolated and hermetical from the fluid chamber. The fluid chamber is disposed between the top cover and the spacing member for receiving therein a fluid dynamic bearing (70) and a rotor (20) which drives working fluid to enter and leave the liquid pump. The receiving cavity is disposed between the spacing member and the back plate for receiving therein a stator (30) which drives the rotor to rotate in respective to the bearing.Type: GrantFiled: March 8, 2006Date of Patent: January 6, 2009Assignee: Foxconn Technology Co., Ltd.Inventors: Ching-Hsing Huang, Wun-Chang Shih, Chien-Long Hong, Huan-Chao Lin, Wei-Ben Wang, Fong-Tan Yu, Hsien-Sheng Pei