Patents by Inventor Michael Joos
Michael Joos 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: 6856485Abstract: A disc drive having a pivot cartridge and an actuator assembly. The actuator assembly consists of an actuator body which has a bore therein to receive the pivot cartridge. The actuator body further consists of an opening which serves as a ledge to engage a biased retaining ring. The biased retaining ring couples onto the pivot cartridge and forces the pivot cartridge to contact against one side of the bore of the actuator body.Type: GrantFiled: February 5, 2001Date of Patent: February 15, 2005Assignee: Seagate Technology LLCInventors: Michael Joo Chiang Toh, Xiong Liu, Joseph Cheng-Tsu Liu, Choonkiat Lim
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Patent number: 6851407Abstract: A connecting piece (1) is disposed between a carburetor (4) and an inlet channel (3) in an internal combustion engine of a portable handheld motor-driven work apparatus. The connecting piece functions to compensate for relative position changes between the engine and the carburetor (4), is made of elastic material and includes an expansion fold (5) for compensating for changes in position. The length of the expansion fold (5) is changeable from a collapsed to an expanded length. The expansion fold (5) subdivides the connecting piece (1) into a carburetor-end channel section (6) having a circularly-shaped cross section and an engine-end channel section (7) having a cross section departing from the circular form at the end facing toward the engine. The connecting piece (1) has a constant flow cross section over its entire length when the expansion fold (5) is collapsed.Type: GrantFiled: March 26, 2003Date of Patent: February 8, 2005Assignee: Andreas Stihl AG & Co. KGInventors: Helmut Zimmermann, Michael Joos, Andreas Radtke, Stefan Leuze
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Patent number: 6801386Abstract: A pivot cartridge assembly with improved resonance characteristics. One end of the pivot bearing shaft is mounted to the base of the disc drive, and the other end is secured to the cover of the disc drive in such a manner that the resonance characteristics of the pivot bearing assembly is improved in both the axial and radial direction of the pivot bearing shaft.Type: GrantFiled: April 19, 2000Date of Patent: October 5, 2004Assignee: Seagate Technology LLCInventors: Jierapipatanakul Niroot, Andre Yew Loon Liem, Mo Xu, Joseph Heng Tung Lau, Michael Joo Chiang Toh
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Patent number: 6687094Abstract: An actuator having a relatively low mass for supporting flexible head suspension assemblies to read data from or write data to discs. The actuator includes an actuator body adapted to rotationally coupled to a base chassis of the disc drive and a yoke assembly including yoke arms extending from the actuator body. The actuator includes at least one rigid actuator arm rigidly supporting the flexible head suspension assemblies. The rigid actuator arm includes multiple arm plates supported in spaced relation to provide a thickness of the actuator arm for lateral stiffness.Type: GrantFiled: June 29, 2001Date of Patent: February 3, 2004Assignee: Seagate Technology LLCInventors: Xiong Liu, Shri Hari Narayan, Michael Joo Chiang Toh, Choonkiat Lim, ChorShan Cheng
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Patent number: 6678114Abstract: A method for minimizing unbalance in the disc pack of a disc drive where the unbalance of the spindle motor is quantified and incorporated into the biasing assembly of the disc pack. In the assembly process, the discs are biased in a manner such that the unbalance of the spindle motor is considered.Type: GrantFiled: February 16, 2001Date of Patent: January 13, 2004Assignee: Seagate Technology LLCInventors: Niroot Jicrapipalanakul, Victor Chi Siang Choo, Poh Lye Lim, Michael Joo Chiang Toh, Kwee Teck Say, Beng Wee Quak, Chee Suan Low
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Publication number: 20030217740Abstract: A connecting piece (1) is disposed between a carburetor (4) and an inlet channel (3) in an internal combustion engine (2) of a portable handheld motor-driven work apparatus such as a motor-driven chain saw, cutoff machine or the like. The connecting piece functions to compensate for relative position changes between the engine (2) and the carburetor (4). The connecting piece (1) is made of elastic material and includes an expansion fold (5) for compensating for changes in position. The length of the expansion fold (5) is changeable from a collapsed to an expanded length. The expansion fold (5) subdivides the connecting piece (1) into a carburetor-end channel section (6) and an engine-end channel section (7). The carburetor-end channel section (6) has a circularly-shaped cross section and the engine-end channel section (7) has a cross section departing from the circular form at the end facing toward the engine (2).Type: ApplicationFiled: March 26, 2003Publication date: November 27, 2003Inventors: Helmut Zimmermann, Michael Joos, Andreas Radtke, Stefan Leuze
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Publication number: 20030220751Abstract: A method of testing a data storage system such that the data storage system meets vibration performance standards includes the step of adding a reference vibration signal having varying magnitudes into a servo loop of the data storage system to simulate external vibration. The method also includes the step of verifying the external vibration performance by using the simulated external vibration. The simulated external vibration is simulated rotational vibration. Also disclosed is a data storage system configured to implement the method.Type: ApplicationFiled: May 19, 2003Publication date: November 27, 2003Inventors: Michael Joo Chiang Toh, Yong Yang, Razman Zambri, Xiong Liu, Choon Kiat Lim
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Publication number: 20030183213Abstract: A connecting piece (1) between a carburetor (4) and an inlet channel (3) is disposed in an internal combustion engine (2) of a portable handheld motor-driven work apparatus such as a motor-driven chain saw, cutoff machine, et cetera. The connecting piece (1) serves to compensate for relative position changes between the engine (2) and the carburetor (4). The connecting piece (1) is made of elastic material and has an expansion fold (5) which functions to compensate for length changes. The length of the connecting piece can be changed from a pressed length (a) to an expanded length (b). The expansion fold (5) partitions the connecting piece (1) into a carburetor-end section (6) and into an engine-end section (7).Type: ApplicationFiled: March 26, 2003Publication date: October 2, 2003Inventors: Helmut Zimmermann, Michael Joos, Andreas Radtke, Stefan Leuze
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Publication number: 20030183186Abstract: An elastic connecting piece (1) is mounted between a carburetor (4) and an inlet channel (3) of an internal combustion engine (2). The engine (2) is especially an engine of a portable handheld motor-driven work apparatus such as a motor-driven chain saw, cutoff machine or the like. The connecting piece (1) includes a peripherally extending expansion fold (5) arranged between its ends in order to compensate for changes in length. The expansion fold (5) subdivides the connecting piece (1) into a carburetor-end section (6) and into an engine-end section (7). The annular gap (28) of the expansion fold (5) can be bridged by a seal lip (8). The connecting piece (1) includes a peripherally extending seal seat (9) of axial length (g) in the region of the expansion fold (5). The seal lip (8) can be placed in seal-tight contact with the seal seat (9) and substantially closes the expansion fold (5) fluid tight to the interior space of the connecting piece (1).Type: ApplicationFiled: March 26, 2003Publication date: October 2, 2003Inventors: Helmut Zimmermann, Michael Joos, Andreas Radtke, Stefan Leuze
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Publication number: 20030063412Abstract: A method for minimizing unbalance in the disc pack of a disc drive where the unbalance of the spindle motor is quantified and incorporated into the biasing assembly of the disc pack. In the assembly process, the discs are biased in a manner such that the unbalance of the spindle motor is considered.Type: ApplicationFiled: February 16, 2001Publication date: April 3, 2003Inventors: Niroot Jierapipatanakul, Victor Chi Siang Choo, Poh Lye Lim, Michael Joo Chiang Toh, Kwee Teck Say, Beng Wee Quak, Chee Suan Low
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Patent number: 6442000Abstract: An actuator and a method for using an actuator in a disc drive having a limited range of rotation wherein an actuator arm for providing motion for reading or writing data to or from media engages a shaft or post fixed within the actuator arm for communicating with the actuator arm by means of clips affixed to the shaft. The clips have flexible wings affixed to the actuator arm whereby the shaft and the actuator arm are held in a fixed relationship allowing the arm to rotate with respect to the shaft while movement between the actuator arm and the shaft other than by rotation is prevented by the shape of the flexible wings.Type: GrantFiled: October 18, 1999Date of Patent: August 27, 2002Assignee: Seagate Technology LLCInventors: See Jee Johaan Koong, Michael Joo Chiang Toh, Choon Kiat Lim, Wai Onn Chee, Kevin Arthur Gomez
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Publication number: 20020101688Abstract: A disc drive having an actuator assembly which includes an actuator arm and having a pivot cartridge which consists of a sleeve, a shaft and a hinge. The hinge is thin and short in the horizontal direction along the x-y plane and long in the vertical direction along the z-axis. The hinge engages the sleeve and the shaft with the ends of the hinge, allowing only the central part of the hinge configured to be flexible. The assembly of the pivot cartridge into the actuator assembly forces the actuator arm to rotate only about the z-axis.Type: ApplicationFiled: December 1, 2000Publication date: August 1, 2002Inventors: Joseph Cheng-Tsu Liu, Xiong Liu, Michael Joo Chiang Toh, Choonkiat Lim, Kevin Arthur Gomez
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Patent number: 6400533Abstract: There is provided an inertial latching system which includes a first latch member configured to engage a second latch member at a junction point. The first latch member includes a latch pivot mounted to the base. One side of the latch pivot extends to form a first arm whilst a balancing mass is found at another side of the latch pivot. Joined to the first arm is a finger which provides a contact line ending in a proximal point. The second latch member has a contact surface which provides a contact point. The inertial latching system is configured such that the ratio of a first length to a second length is smaller than the ratio of a third length to a fourth length.Type: GrantFiled: June 30, 2000Date of Patent: June 4, 2002Assignee: Seagate Technology LLCInventors: Joseph Cheng-Tsu Liu, Michael Joo Chiang Toh, Yiren Hong, Chor Shan Cheng, Choon Kiat Lim, Niroot Jierapipatanakul
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Publication number: 20020064000Abstract: An actuator having a relatively low mass for supporting flexible head suspension assemblies to read data from or write data to discs. The actuator includes an actuator body adapted to rotationally coupled to a base chassis of the disc drive and a yoke assembly including yoke arms extending from the actuator body. The actuator includes at least one rigid actuator arm rigidly supporting the flexible head suspension assemblies. The rigid actuator arm includes multiple arm plates supported in spaced relation to provide a thickness of the actuator arm for lateral stiffness.Type: ApplicationFiled: June 29, 2001Publication date: May 30, 2002Inventors: Xiong Liu, Shri Hari Narayan, Michael Joo Chiang Toh, Choonkiat Lim, ChorShan Cheng
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Patent number: 6324054Abstract: The shock absorber apparatus for a disc drive is a molded polymeric enclosure adapted to receive and retain a disc drive. One preferred embodiment of the present invention has a shock absorbing material of a first thickness adjacent a critical region of the drive and a second thickness of shock absorbing material adjacent a non-critical region of the disc drive. The first thickness is greater than the second thickness in order to absorb a greater shock load to protect the critical region of the disc drive.Type: GrantFiled: April 11, 2000Date of Patent: November 27, 2001Assignee: Seagate Technology LLCInventors: Wai Onn Chee, Joseph Cheng-Tsu Liu, Niroot Jierapipapatanakul, Choon Kiat Lim, Michael Joo-Chiang Toh, Pow-Hing Yong
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Publication number: 20010040770Abstract: A disc drive having a pivot cartridge and an actuator assembly. The actuator assembly consists of an actuator body which has a bore therein to receive the pivot cartridge. The actuator body further consists of an opening which serves as a ledge to engage a biased retaining ring. The biased retaining ring couples onto the pivot cartridge and forces the pivot cartridge to contact against one side of the bore of the actuator body.Type: ApplicationFiled: January 9, 2001Publication date: November 15, 2001Inventors: Michael Joo Chiang Toh, Xiong Liu, Joseph Cheng-Tsu Liu, Choonkiat Lim
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Patent number: 6288867Abstract: An information handling system, such as a disc drive, including a base, a disc stack rotatably attached to the base, and an actuator assembly movably attached to the base. The disc stack assembly includes a spindle hub rotatably coupled to the disc drive. The spindle hub has an axis of rotation about which the disc stack assembly rotates. The spindle hub includes a cylindrical portion. The disc stack assembly also includes a clamp, a disc spacer, and a disc coupled to a spindle hub. The disc spacer has an opening therein dimensioned to receive the cylindrical portion of the spindle hub. The disc spacer is asymmetrical and positioned to counter balance a mass offset in the disc stack assembly. The asymmetrical disc spacer also includes a registration surface. The registration surface is on the outer perimeter of the disc spacer. The disc spacer has a center of mass offset from the axial centerline of the opening. The disc spacer is used to counter the center of mass offset of the disc stack assembly.Type: GrantFiled: February 9, 1999Date of Patent: September 11, 2001Assignee: Seagate Technology Inc.Inventors: Niroot Jierapipatanakul, Michael Joo Chiang Toh, Beng Wee Quak, Chee Suan Low
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Patent number: 6256173Abstract: An apparatus for isolating vibration in pivot bearing assemblies that is incorporated in a standard pivot bearing assembly without requiring modification of the pivot bearing assembly. Washers are used between the pivot bearing assembly and the base plate of a disc drive upon which the assembly is mounted. In addition, a second washer is positioned on the shaft of the assembly and is held in place by a shoulder screw which fastens the assembly to the base plate.Type: GrantFiled: June 11, 1999Date of Patent: July 3, 2001Assignee: Seagate Technology LLCInventors: Wai Onn Chee, Joseph Heng Tung Lau, Michael Joo Chiang Toh, Xiong Liu