Patents by Inventor Mohammad M. Ameen
Mohammad M. Ameen 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: 8622844Abstract: A component of a disc drive has a coating of a predetermined length on its surface, the coating having at least two separate tapered regions applied in independent steps, the at least two separate tapered regions each having a length that is less than the predetermined length of the component surface. When the component is a shaft of a spindle motor, the ends of the shaft are masked before the tapered regions of coating are applied, and the thickness of the masks covering the shaft ends is varied to control a taper of tapered regions.Type: GrantFiled: March 30, 2010Date of Patent: January 7, 2014Assignee: Seagate Technology LLCInventors: Mohammad M. Ameen, Jerry Weingord, Thaveesinn Vasavakul, Kenneth Cornyn
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Patent number: 7892100Abstract: For motors having a journal with one or more groove regions and a shaft for relative rotation in the journal, aspects include providing a dual tapered shaft. The shaft may be tapered by the application of a wear resistant coating at least opposite the groove regions. The coating introduces a shaft taper from near a top end and from near a bottom end towards the shaft middle. The shaft taper may provide for improved pumping efficiency. The coating may be applied in various processes such as chemical vapor deposition or physical vapor deposition to establish a thickness gradient of coating material from near the top end and near the bottom end towards the shaft middle. In one example, the coating includes a DLC coating. Additionally, shaft portions may be shielded to prevent coatings thereon.Type: GrantFiled: April 14, 2008Date of Patent: February 22, 2011Assignee: Seagate Technologies LLCInventors: Jeffry A. LeBlanc, Troy M. Herndon, Mohammad M. Ameen, Raquib U. Kahn
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Publication number: 20100184521Abstract: A component of a disc drive has a coating of a predetermined length on its surface, the coating having at least two separate tapered regions applied in independent steps, the at least two separate tapered regions each having a length that is less than the predetermined length of the component surface. When the component is a shaft of a spindle motor, the ends of the shaft are masked before the tapered regions of coating are applied, and the thickness of the masks covering the shaft ends is varied to control a taper of tapered regions.Type: ApplicationFiled: March 30, 2010Publication date: July 22, 2010Applicant: SEAGATE TECHNOLOGY LLCInventors: Mohammad M. Ameen, Jerry Weingord, Thaveesinn Vasavakul, Kenneth Cornyn
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Patent number: 7718044Abstract: A component of a disc drive has a coating of a predetermined length on its surface, the coating having at least two separate tapered regions applied in independent steps, the at least two separate tapered regions each having a length that is less than the predetermined length of the component surface. When the component is a shaft of a spindle motor, the ends of the shaft are masked before the tapered regions of coating are applied, and the thickness of the masks covering the shaft ends is varied to control a taper of tapered regions.Type: GrantFiled: September 11, 2006Date of Patent: May 18, 2010Assignee: Seagate Technology LLCInventors: Mohammad M. Ameen, Jerry Weingord, Thaveesinn Vasavakul, Kenneth Cornyn
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Publication number: 20080261708Abstract: For motors having a journal with one or more groove regions and a shaft for relative rotation in the journal, aspects include providing a dual tapered shaft. The shaft may be tapered by the application of a wear resistant coating at least opposite the groove regions. The coating introduces a shaft taper from near a top end and from near a bottom end towards the shaft middle. The shaft taper may provide for improved pumping efficiency. The coating may be applied in various processes such as chemical vapor deposition or physical vapor deposition to establish a thickness gradient of coating material from near the top end and near the bottom end towards the shaft middle. In one example, the coating includes a DLC coating. Additionally, shaft portions may be shielded to prevent coatings thereon.Type: ApplicationFiled: April 14, 2008Publication date: October 23, 2008Applicant: Seagate Technology LLCInventors: Jeffry A. LeBlanc, Troy M. Herndon, Mohammad M. Ameen, Raquib U. Khan
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Patent number: 7378771Abstract: For motors having a journal with one or more groove regions and a shaft for relative rotation in the journal, aspects include providing a dual tapered shaft. The shaft may be tapered by the application of a wear resistant coating at least opposite the groove regions. The coating introduces a shaft taper from near a top end and from near a bottom end towards the shaft middle. The shaft taper may provide for improved pumping efficiency. The coating may be applied in various processes such as chemical vapor deposition or physical vapor deposition to establish a thickness gradient of coating material from near the top end and near the bottom end towards the shaft middle. In one example, the coating includes a DLC coating. Additionally, shaft portions may be shielded to prevent coatings thereon.Type: GrantFiled: March 17, 2005Date of Patent: May 27, 2008Assignee: Seagate Technology LLCInventors: Jeffry A. Leblanc, Troy M. Herndon, Mohammad M. Ameen, Raquib U. Khan
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Publication number: 20080063328Abstract: A component of a disc drive has a coating of a predetermined length on its surface, the coating having at least two separate tapered regions applied in independent steps, the at least two separate tapered regions each having a length that is less than the predetermined length of the component surface. When the component is a shaft of a spindle motor, the ends of the shaft are masked before the tapered regions of coating are applied, and the thickness of the masks covering the shaft ends is varied to control a taper of tapered regions.Type: ApplicationFiled: September 11, 2006Publication date: March 13, 2008Applicant: SEAGATE TECHNOLOGY LLCInventors: Mohammad M. Ameen, Jerry Weingord, Thaveesinn Vasavakul, Kenneth Cornyn
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Patent number: 6952324Abstract: A disc drive storage system including a housing having a central axis, a stationary member that is fixed with respect to the housing and coaxial with the central axis, and a rotatable member that is rotatable about the central axis with respect to the stationary member. A hydro bearing interconnects the stationary member and the rotatable member and includes a lubricating fluid having a base fluid and an additive and/or a combination of additives or base fluids for reducing the temperature dependency of the viscosity of the lubricating fluid.Type: GrantFiled: July 9, 2002Date of Patent: October 4, 2005Assignee: Seagate Technology, LLCInventors: Raquib U. Khan, Mohammad M. Ameen
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Patent number: 6664685Abstract: A disc drive storage system including a housing having a central axis, a stationary member that is fixed with respect to the housing and coaxial with the central axis, and a rotatable member that is rotatable about the central axis with respect to the stationary member is described. A hydrodynamic bearing interconnects the stationary member and the rotatable member and includes at least one working surface comprising a wear resistant coating.Type: GrantFiled: December 13, 2001Date of Patent: December 16, 2003Assignee: Seagate Technology LLCInventors: Mohammad M. Ameen, Raquib U. Khan
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Publication number: 20030094869Abstract: A disc drive storage system including a housing having a central axis, a stationary member that is fixed with respect to the housing and coaxial with the central axis, and a rotatable member that is rotatable about the central axis with respect to the stationary member is described. A hydrodynamic bearing interconnects the stationary member and the rotatable member and includes at least one working surface comprising a wear resistant coating.Type: ApplicationFiled: December 13, 2001Publication date: May 22, 2003Applicant: Seagate Technology, LLCInventors: Mohammad M. Ameen, Raquib U. Khan
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Publication number: 20030076624Abstract: A disc drive storage system including a housing having a central axis, a stationary member that is fixed with respect to the housing and coaxial with the central axis, and a rotatable member that is rotatable about the central axis with respect to the stationary member. A hydro bearing interconnects the stationary member and the rotatable member and includes a lubricating fluid having a base fluid and an additive and/or a combination of additives or base fluids for reducing the temperature dependency of the viscosity of the lubricating fluid.Type: ApplicationFiled: July 9, 2002Publication date: April 24, 2003Inventors: Raquib U. Khan, Mohammad M. Ameen
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Publication number: 20030048574Abstract: A disc drive storage system includes a housing having a central axis, a stationary member that is fixed with respect to the housing and coaxial with the central axis, and a rotatable member that is rotatable about the central axis with respect to the stationary member. A hydro bearing interconnects the stationary member and the rotatable member. The hydro bearing components are formed with a gall resistant material to prevent galling between working surfaces of the disc drive system.Type: ApplicationFiled: December 21, 2001Publication date: March 13, 2003Applicant: Seagate Technology, LLCInventors: Raquib U. Khan, Chris M. Woldemar, Mohammad M. Ameen
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Patent number: 6417987Abstract: A non-reactive hard coating of carbon or ceramic is applied to the major components of the spindle motor which are exposed to the atmosphere internal to the hard disc drive. By having such a thin layer of carbon or other ceramic coating, it will protect against outgassing of motor components and create a neutral or non-reactive surface that does not promote corrosion. The coating thickness can be preferably in the order of nanometers to microns depending upon the drive design and the operating conditions.Type: GrantFiled: October 30, 2000Date of Patent: July 9, 2002Assignee: Seagate Technology LLCInventors: Raquib U. Khan, Mohammad M. Ameen