Patents by Inventor Ashok B. Nayak
Ashok B. Nayak 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: 8902541Abstract: A head rotator assembly (22) for dynamically compensating for a tape skew of a storage tape that moves over a head (20) in a tape drive (10) comprises a head supporter (230) that is coupled to and supports the head (20), and a supporter mover assembly (232). The supporter mover assembly (232) includes a first actuator (234A) that indirectly rotates a portion of the head supporter (230) about an axis to move the head (20) in an azimuth direction relative to the storage tape to dynamically compensate for the tape skew as the storage tape moves over the head (20). Additionally, the supporter mover assembly (232) can include a first lever (236A) moved by the first actuator (234A) to rotate the portion of the head supporter (230) so that the head (20) moves in the azimuth direction relative to the storage tape to dynamically compensate for the tape skew.Type: GrantFiled: March 13, 2014Date of Patent: December 2, 2014Assignee: Quantum CorporationInventors: Ashok B. Nayak, Turguy Goker, Ming-Chih Weng, James Mark Decot
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Patent number: 8867163Abstract: A head rotator assembly for positioning a head of a tape drive relative to a storage tape that moves over the head comprises a head supporter and a supporter mover assembly. The head supporter is coupled to and supports the head. The supporter mover assembly includes a first actuator that indirectly rotates a portion of the head supporter about an axis to move the head in an azimuth direction relative to the storage tape as the storage tape moves over the head. The supporter mover assembly can further include a first lever. The first actuator moves the first lever to rotate the portion of the head supporter so that the head moves in the azimuth direction relative to the storage tape.Type: GrantFiled: October 28, 2013Date of Patent: October 21, 2014Assignee: Quantum CorporationInventors: Ashok B. Nayak, Turguy Goker, Ming-Chih Weng, James Mark Decot
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Publication number: 20140192437Abstract: A head rotator assembly (22) for positioning a head (20) of a tape drive (10) relative to a storage tape includes a head supporter (230) and a supporter mover assembly (232). The head supporter (230) is coupled to and supports the head (20). The supporter mover assembly (232) selectively rotates a portion of the head supporter (230) about an axis (241) to move the head (20) in an azimuth direction relative to the storage tape as the storage tape moves over the head (20). The head rotator assembly (22) further includes a controller (16) that controls movement of the supporter mover assembly (232) based at least partially on a positioning signal. The supporter mover assembly (232) can include a first actuator (234A) and a first lever (236A). The first actuator (234A) moves the first lever (236A) to rotate the head supporter (230) so that the head (20) moves in the azimuth direction. The first actuator (234A) can include a piezoelectric element.Type: ApplicationFiled: March 13, 2014Publication date: July 10, 2014Applicant: Quantum CorporationInventors: Ashok B. Nayak, Turguy Goker, Ming-Chih Weng, James Mark Decot
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Publication number: 20140049855Abstract: A head rotator assembly (22) for positioning a head (20) of a tape drive (10) relative to a storage tape includes a head supporter (230) and a supporter mover assembly (232). The head supporter (230) is coupled to and supports the head (20). The supporter mover assembly (232) selectively rotates a portion of the head supporter (230) about an axis (241) to move the head (20) in an azimuth direction relative to the storage tape as the storage tape moves over the head (20). The head rotator assembly (22) further includes a controller (16) that controls movement of the supporter mover assembly (232) based at least partially on a positioning signal. The supporter mover assembly (232) can include a first actuator (234A) and a first lever (236A). The first actuator (234A) moves the first lever (236A) to rotate the head supporter (230) so that the head (20) moves in the azimuth direction. The first actuator (234A) can include a piezoelectric element.Type: ApplicationFiled: October 28, 2013Publication date: February 20, 2014Applicant: Quantum CorporationInventors: Ashok B. Nayak, Turguy Goker, Ming-Chih Weng, James Mark Decot
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Patent number: 8599519Abstract: A head rotator assembly (22) for positioning a head (20) of a tape drive (10) relative to a storage tape includes a head supporter (230) and a supporter mover assembly (232). The head supporter (230) is coupled to and supports the head (20). The supporter mover assembly (232) rotates a portion of the head supporter (230) about an axis (241) to move the head (20) in an azimuth direction relative to the storage tape as the storage tape moves over the head (20). The head rotator assembly (22) includes a controller (16) that controls movement of the supporter mover assembly (232) based on a positioning signal. The supporter mover assembly (232) can include a first actuator (234A) that moves a first lever (236A) to rotate the head supporter (230) to move the head (20) in the azimuth direction. The first actuator (234A) biases the first lever (236A) to rotate part of the head supporter (230) to move the head in the azimuth direction.Type: GrantFiled: September 30, 2011Date of Patent: December 3, 2013Assignee: Quantum CorporationInventors: Ashok B. Nayak, Turguy Goker, Ming-Chih Weng, James Mark Decot
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Publication number: 20130083421Abstract: A head rotator assembly (22) for positioning a head (20) of a tape drive (10) relative to a storage tape includes a head supporter (230) and a supporter mover assembly (232). The head supporter (230) is coupled to and supports the head (20). The supporter mover assembly (232) rotates a portion of the head supporter (230) about an axis (241) to move the head (20) in an azimuth direction relative to the storage tape as the storage tape moves over the head (20). The head rotator assembly (22) includes a controller (16) that controls movement of the supporter mover assembly (232) based on a positioning signal. The supporter mover assembly (232) can include a first actuator (234A) that moves a first lever (236A) to rotate the head supporter (230) to move the head (20) in the azimuth direction. The first actuator (234A) biases the first lever (236A) to rotate part of the head supporter (230) to move the head in the azimuth direction.Type: ApplicationFiled: September 30, 2011Publication date: April 4, 2013Inventors: Ashok B. Nayak, Turguy Goker, Ming-Chih Weng, James Mark Decot
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Patent number: 8059355Abstract: An actuator assembly (22) for positioning a head (16) of a tape drive (10) relative to a storage tape that moves along a tape path (24) includes a first actuator (228), a second actuator (230) and a controller (26). The actuators (228, 230) move the head (16) in a direction that is substantially perpendicular to the tape path. The first actuator (228) is mounted to the second actuator (230) at a location that is based on a position of a resonance node (680) of the second actuator (230). The controller (26) controls linear positioning of the first actuator (228) and the second actuator (230) relative to the storage tape on a closed-loop basis. The actuators (228, 230) can each include voice coils (246, 260). The second actuator (230) can include two positioner guides (253A, 253B) that are configured in a substantially collinear configuration or in a triangular configuration with the head (16).Type: GrantFiled: June 8, 2009Date of Patent: November 15, 2011Assignee: Quantum CorporationInventors: Ashok B. Nayak, Ming-Chih Weng, Turguy Goker
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Publication number: 20100309579Abstract: An actuator assembly (22) for positioning a head (16) of a tape drive (10) relative to a storage tape that moves along a tape path (24) includes a first actuator (228), a second actuator (230) and a controller (26). The actuators (228, 230) move the head (16) in a direction that is substantially perpendicular to the tape path. The first actuator (228) is mounted to the second actuator (230) at a location that is based on a position of a resonance node (680) of the second actuator (230). The controller (26) controls linear positioning of the first actuator (228) and the second actuator (230) relative to the storage tape on a closed-loop basis. The actuators (228, 230) can each include voice coils (246, 260). The second actuator (230) can include two positioner guides (253A, 253B) that are configured in a substantially collinear configuration or in a triangular configuration with the head (16).Type: ApplicationFiled: June 8, 2009Publication date: December 9, 2010Inventors: Ashok B. Nayak, Ming-Chih Weng, Turguy Goker
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Patent number: 7502196Abstract: A head actuator design for a low profile tape drive is configured with a damping system for a head suspension system having flexure springs to accommodate a half-high form factor. The damping system employs hall sensors, for example, mounted on the head carriage that moves with the head carriage to provide position signals that are differentiated to form velocity signals used by a servo loop control system to dampen suspension system resonance. A flexible circuit routing is provided that is manageable for half-high form factors by combining the fine positioner loop and course positioner loop into a single loop, and preventing the head flexible printed circuit from contacting a top cover in the routing to a printed circuit board near the top cover.Type: GrantFiled: April 28, 2008Date of Patent: March 10, 2009Assignee: Certance LLCInventors: Ashok B. Nayak, James M. Decot
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Patent number: 7440235Abstract: A tape drive apparatus is provided with a base plate and tape path components on this base plate. The apparatus includes a bracket that is adjustably coupled to the base plate, the path components carrying a magnetic head for reading and writing to a tape transported by the path components. Pre-loaded jackscrews of the adjustment couplings are rotated to adjust and lock the azimuth and zenith settings for the magnetic head. A separate penetration screw independently controls the penetration of the magnetic tape.Type: GrantFiled: September 27, 2006Date of Patent: October 21, 2008Assignee: Certance LLCInventor: Ashok B. Nayak
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Patent number: 7420781Abstract: A head actuator assembly includes a coarse positioner base assembly that is mounted on a guide shaft and an anti-rotation shaft and provides increased structural rigidity due to a four-point support and spring loading of the coarse positioner base against the anti-rotation shaft. A two-part head-carriage and voice coil holder system permits different materials to be used for the head-carriage and the voice coil holder, obviating structural problems of a single-structured head-carriage and coil-holder system. A flexible printed circuit bracket eases manufacture and allows flexible printed circuits to be slid into the bracket and retained in place without the need for locating tabs and screws.Type: GrantFiled: May 30, 2007Date of Patent: September 2, 2008Assignee: Certance LLCInventors: Ashok B. Nayak, James M. Decot
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Publication number: 20080198495Abstract: A head actuator design for a low profile tape drive is configured with a damping system for a head suspension system having flexure springs to accommodate a half-high form factor. The damping system employs hall sensors, for example, mounted on the head carriage that moves with the head carriage to provide position signals that are differentiated to form velocity signals used by a servo loop control system to dampen suspension system resonance. A flexible circuit routing is provided that is manageable for half-high form factors by combining the fine positioner loop and course positioner loop into a single loop, and preventing the head flexible printed circuit from contacting a top cover in the routing to a printed circuit board near the top cover.Type: ApplicationFiled: April 28, 2008Publication date: August 21, 2008Inventors: Ashok B. Nayak, James M. Decot
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Patent number: 7379259Abstract: A head actuator design for a low profile tape drive is configured with a damping system for a head suspension system having flexure springs to accommodate a half-high form factor. The damping system employs hall sensors, for example, mounted on the head carriage that moves with the head carriage to provide position signals that are differentiated to form velocity signals used by a servo loop control system to dampen suspension system resonance. A flexible circuit routing is provided that is manageable for half-high form factors by combining the fine positioner loop and course positioner loop into a single loop, and preventing the head flexible printed circuit from contacting a top cover in the routing to a printed circuit board near the top cover.Type: GrantFiled: September 12, 2005Date of Patent: May 27, 2008Assignee: Certance LLCInventors: Ashok B. Nayak, James M. Decot
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Patent number: 7292410Abstract: A tape drive head cleaner has a brush that is driven to sweep over a write/read head in the direction of longitudinal grooves on the write/read head. Debris that are within the grooves are swept out of the grooves by the movement of the brush in the direction of the grooves. The brush is carried by a tape drive head cleaner mechanism that includes a lead screw driven by a stepper motor that engages the half nut attached to a brush carriage that carries the brush. The brush carriage is guided by fixed guide shafts so that the brush is precisely swept over the write/read head.Type: GrantFiled: October 31, 2003Date of Patent: November 6, 2007Assignee: Certance, LLCInventors: Ashok B. Nayak, Somsack Vilaysack
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Patent number: 7247961Abstract: A magnetic/encoder assembly has a compact design and combines the features of motor, encoder and chuck locating feature within a single motor housing. The motor/encoder includes a DC brushless motor with an inner magnetic rotor. The motor windings and the commutation electronics are mounted towards the bottom side of a printed circuit board. The rotor of the motor is extended above the surface of the printed circuit board. The extended rotor provides a precision seat for the magnetic wheel with multiple poles. The top surface of the printed circuit board mounts the sensor for the encoder. The extension of the rotor provides the precision mounting surface of the cartridge driving chuck.Type: GrantFiled: May 11, 2006Date of Patent: July 24, 2007Assignee: Quantum CorporationInventors: Ashok B. Nayak, Robert R. Heinze
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Patent number: 7247960Abstract: A magnetic/encoder assembly has a compact design and combines the features of motor, encoder and chuck locating feature within a single motor housing. The motor/encoder includes a DC brushless motor with an inner magnetic rotor. The motor windings and the commutation electronics are mounted towards the bottom side of a printed circuit board. The rotor of the motor is extended above the surface of the printed circuit board. The extended rotor provides a precision seat for the magnetic wheel with multiple poles. The top surface of the printed circuit board mounts the sensor for the encoder. The extension of the rotor provides the precision mounting surface of the cartridge driving chuck.Type: GrantFiled: May 11, 2006Date of Patent: July 24, 2007Assignee: Quantum CorporationInventors: Ashok B. Nayak, Robert R. Heinze
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Patent number: 7227724Abstract: A head actuator assembly includes a coarse positioner base assembly that is mounted on a guide shaft and an anti-rotation shaft and provides increased structural rigidity due to a four-point support and spring loading of the coarse positioner base against the anti-rotation shaft. A two-part head-carriage and voice coil holder system permits different materials to be used for the head-carriage and the voice coil holder, obviating structural problems of a single-structured head-carriage and coil-holder system. A flexible printed circuit bracket eases manufacture and allows flexible printed circuits to be slid into the bracket and retained in place without the need for locating tabs and screws.Type: GrantFiled: January 28, 2004Date of Patent: June 5, 2007Assignee: Certance, LLCInventors: Ashok B. Nayak, James M. Decot
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Patent number: 7180708Abstract: A tape drive is provided having a pair of stationary guide assemblies disposed symmetrically about the magnetic read/write head. Each of the stationary guide assemblies has a mounting portion and a separate guide surface portion mounted on the mounting portion. The mounting portion may be made of a plastic and the guide surface portion of a ceramic, for example. A spring arrangement with pressure pads is mounted directly on the mounting portion, and applies pressure to a top edge of a tape during guiding of the tape.Type: GrantFiled: May 24, 2005Date of Patent: February 20, 2007Assignee: Certance, LLCInventors: Ashok B. Nayak, Ming-chih Weng
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Patent number: 7145272Abstract: A magnetic/encoder assembly has a compact design and combines the features of motor, encoder and chuck locating feature within a single motor housing. The motor/encoder includes a DC brushless motor with an inner magnetic rotor. The motor windings and the commutation electronics are mounted towards the bottom side of a printed circuit board. The rotor of the motor is extended above the surface of the printed circuit board. The extended rotor provides a precision seat for the magnetic wheel with multiple poles. The top surface of the printed circuit board mounts the sensor for the encoder. The extension of the rotor provides the precision mounting surface of the cartridge driving chuck.Type: GrantFiled: October 4, 2005Date of Patent: December 5, 2006Assignee: Certance LLCInventors: Ashok B. Nayak, Robert R. Heinze
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Patent number: 7133262Abstract: A tape drive apparatus is provided with a base plate and tape path components on this base plate. The apparatus includes a bracket that is adjustably coupled to the base plate, the bracket carrying a magnetic head for reading and writing to a tape transported by the tape path components. Adjustment couplings couple the bracket to the base plate and are lockably settable to adjust and lock the spatial orientation of the magnetic head with respect to a tape transported by the tape path components. Pre-loaded jackscrews of the adjustment couplings are rotated to adjust and lock the azimuth and zenith settings for the magnetic head. A separate penetration screw independently controls the penetration of the magnetic head into the path of the magnetic tape.Type: GrantFiled: September 30, 2002Date of Patent: November 7, 2006Assignee: Certance LLCInventor: Ashok B. Nayak