1
Takeshi Yoshida, Tetsuya Hamaguchi, Tomokazu Ishii, Shozo Saegusa, Shinsuke Higuchi: Magnetic disk drive with a movable ramp mechanism for relieving impact upon loading and unloading. Hitachi, Antonelli Terry Stout & Kraus, April 9, 2002: US06369988 (17 worldwide citation)

A magnetic disk drive provided with a loadunload mechanism of the rampload type is disclosed, in which even if loading and unloading operations are frequently repeated, damage to a head due to impingement during the unloading operation is eliminated, and a ramp and the lift-tab of a suspension are l ...


2
Takayuki Munemoto, Kazuo Sakai, Fujio Tajima, Tomokazu Ishii, Fumio Takeda, Kouetsu Okuyama, Takeshi Itoh, Shigeyuki Kobata, Kenmei Masuda, Shigemitsu Higuchi: Magnetic tape library device and method for maintaining magnetic recording and reproducing device and magnetic head. Hitachi, Antonelli Terry Stout & Kraus, February 27, 1996: US05495371 (15 worldwide citation)

A magnetic recording and reproducing device and a magnetic tape library device are provided for properly recovering a function and issuing a warning when a failure of a magnetic head of the device takes place because of wear and dirt of the magnetic head. Further, a method for maintaining the magnet ...


3
David W Albrecht, Akihiko Aoyagi, Fu Ying Huang, Tomokazu Ishii, Qinghua Zeng: Hard disk drive (HDD) assembly of small form-factor HDD shock-mounted in frame having dimensions of larger form-factor HDD. Hitachi Global Storage Technologies Netherlands, Thomas R Berthold, May 8, 2007: US07215506 (14 worldwide citation)

The invention is a hard-disk-drive (HDD) assembly that includes a flame having the exterior dimensions of a particular form-factor HDD, an HDD with a form-factor smaller than the frame, a pair of mount assemblies that support the HDD entirely within the larger form-factor frame, and an electrical ca ...


4
Fujio Tajima, Hideki Tanaka, Kooetsu Okuyama, Tomokazu Ishii, Kenji Toki: Servo control method for a servo system. Hitachi, Antonelli Terry Stout & Kraus, December 6, 1994: US05371449 (10 worldwide citation)

In a servo system using a discrete signal relative to a position, a time delay and an error upon detecting a speed due to lack of positional information are eliminated to achieve a positioning to a target position in a short time. A pulse signal X.sub.P relative to a position is used to establish sy ...


5
Kazuo Sakai, Tomokazu Ishii, Tadashi Honzawa, Masaru Orii, Fujio Tajima, Kooetsu Okuyama, Takao Terayama: Information recording and/or reproducing apparatus having a tape threading device with tape guide members having minimum tape wrapping angles. Hitachi, Evenson McKeown Edwards & Lenahan PLLC, May 19, 1998: US05754361 (6 worldwide citation)

A tape cartridge is received into one end of an information recording and/or reproducing apparatus conforming to an 8 inch Form Factor Size. A first reel is held inside this tape cartridge, and a tape wound onto this first reel is extracted from a cartridge including the first reel and threaded by a ...


6
Takeshi Yoshida, Tetsuya Hamaguchi, Tomokazu Ishii, Shozo Saegusa, Shinsuke Higuchi: Magnetic disk drive with a movable ramp mechanism for relieving impact upon loading and unloading. Hitachi, Antonelli Terry Stout Kraus, April 15, 2003: US06549377 (6 worldwide citation)

A magnetic disk drive having a disk for storing information, a spindle motor for rotating the disk, a head for recording information into the disk and reproducing information from said disk, a suspension supporting a slider provided with the head, a carriage supporting the suspension, a voice coil m ...


7
Kazuo Sakai, Fumio Takeda, Taichiro Yamashita, Fujio Tajima, Takao Terayama, Tomokazu Ishii, Kooetsu Okuyama, Takayuki Munemoto, Nobuyuki Kaku, Kenmei Masuda, Shigeyuki Kobata, Fukuyasu Abe, Kenji Ogiro, Shigemitsu Higuchi: Magnetic recording and reproducing apparatus. Hitachi, Antonelli Terry Stout & Kraus, April 14, 1998: US05739976 (3 worldwide citation)

As a method of increasing the storage capacity of a magnetic recording and reproducing apparatus for recording and reproducing information to and from a magnetic tape in a cartridge, there is a helical scan recording method in which the magnetic tape is diagonally wound around a drum which rotates a ...


8
Fujio Tajima, Hideki Tanaka, Kooetsu Okuyama, Tomokazu Ishii, Kenji Toki: Control method and apparatus for a servo- mechanism. Hitachi, Antonelli Terry Stout & Kraus, March 5, 1996: US05497059 (2 worldwide citation)

A servo-mechanism control system calculates an operation value to be applied to a control object from a desired value of a control output and a detected control output of the control object, and drives the control object based on the calculated operation value so that the control output becomes equa ...


9
Fujio Tajima, Hideki Tanaka, Kooetsu Okuyama, Tomokazu Ishii, Kenji Toki: Control method and apparatus for a servo-mechanism. Hitachi, Antonelli Terry Stout & Kraus, October 4, 1994: US05352961 (2 worldwide citation)

A servo-mechanism control system calculates an operation value to be applied to a control object from a desired value of a control output and a detected control output of the control object, and drives the control object based on the calculated operation value so that the control output becomes equa ...


10
Tomokazu Ishii, Seong Woo Kang, Seungman Chang, Chaw Wu Tseng: Head stack latch assembly. Seagate Technology International, November 6, 2012: US08305713 (1 worldwide citation)

This application discloses a Load-UnLoad (LUL) hard disk drive comprising a disk base, a spindle motor mounted on the disk base for rotating at least one disk to create at least one rotating disk surface, and a head stack assembly pivotably coupled to the disk base and configured to engage an actuat ...