公开(公告)号：US4424974A

公开(公告)日：1984-01-10

申请号：US402598

申请日：1982-07-28

Applicant: Yasunaga Mitsuya ,  Kunio Hoshiya ,  Shigemitsu Oguchi ,  Reizo Kaneko

Inventor： Yasunaga Mitsuya ,  Kunio Hoshiya ,  Shigemitsu Oguchi ,  Reizo Kaneko

IPC: F16J15/43 ,  F16J15/16 ,  F16J15/40

CPC classification number: F16J15/43 ,  Y10S277/944

Abstract: An improved ferro fluidic seal assembly having a cylindrical permanent magnet, a pair of ring-shaped yokes coupled coaxially with said magnet, and a fresh fluid storage containing ferro magnetic fluid mounted in a room defined by said magnet and yokes. Said fresh fluid storage is composed of a resilient elongated member like a stainless steel belt adapted and fixed in a circular shape along the surface of the magnet, and supplies fresh fluid to the clearance gaps defined between said yokes and a rotational body to seal said clearance gaps.

Abstract translation: 一种改进的铁流体密封组件，其具有圆柱形永磁体，与所述磁体同轴配合的一对环形轭，以及包含安装在由所述磁体和轭形成的房间中的铁磁流体的新鲜流体存储器。 所述新鲜流体储存器由诸如不锈钢带的弹性细长构件组成，其适于沿着磁体的表面固定成圆形，并且将新鲜流体供应到限定在所述轭和旋转体之间的间隙中，以密封所述间隙 差距

公开(公告)号：US4544972A

公开(公告)日：1985-10-01

申请号：US400148

申请日：1982-07-20

Applicant: Kenji Kogure ,  Takao Kakizaki ,  Yasunaga Mitsuya ,  Shigemitsu Oguchi ,  Koji Otani

Inventor： Kenji Kogure ,  Takao Kakizaki ,  Yasunaga Mitsuya ,  Shigemitsu Oguchi ,  Koji Otani

IPC: H02K33/18 ,  G11B5/55 ,  G11B21/00 ,  G11B21/02 ,  H02K16/00 ,  H02K41/035 ,  G11B5/54 ,  G11B21/08

CPC classification number: H02K41/0358 ,  G11B21/00 ,  G11B5/5521 ,  H02K16/00

Abstract: A magnetic disc type memory device swinging actuator is constituted by a plurality of a driving assemblies juxtaposed on a stationary shaft and extending in the opposite direction. Each driving assembly include a head arm, a magnetic head mounted on one end of the head arm, a coil supporting member for supporting a flat coil and extending in the opposite direction to the head arm, and first and second permanent magnets spaced from the coil in an axial direction of the shaft and also spaced in a direction of arrangement of the flat coil. The first and second permanent magnets are magnetized in the axial direction of the shaft so that poles of opposite polarities confront the flat coil. The first and second permanent magnets are mounted on a common yoke and the flat coils are disposed in a closed magnetic flux path including the first and second permanent magnets and the yokes.

Abstract translation: 磁盘式存储装置摆动致动器由并列在固定轴上并沿相反方向延伸的多个驱动组件构成。 每个驱动组件包括头臂，安装在头臂一端的磁头，用于支撑扁平线圈并在与头臂相反的方向上延伸的线圈支撑构件，以及与线圈间隔开的第一和第二永磁体 在轴的轴向上，并且在扁平线圈的布置方向上也间隔开。 第一和第二永磁体在轴的轴向被磁化，使得相反极性的极面对扁平线圈。 第一和第二永久磁铁安装在公共轭上，扁平线圈设置在包括第一和第二永久磁铁和磁轭的封闭磁通路中。

公开(公告)号：US4903151A

公开(公告)日：1990-02-20

申请号：US5984

申请日：1987-01-22

Applicant: Makoto Mizukami ,  Akio Mitamura ,  Ryoichi Arai ,  Yasunaga Mitsuya ,  Tetsuo Mikazuki

Inventor： Makoto Mizukami ,  Akio Mitamura ,  Ryoichi Arai ,  Yasunaga Mitsuya ,  Tetsuo Mikazuki

IPC: G11B21/10 ,  G11B5/48 ,  G11B5/55 ,  G11B5/596 ,  G11B7/085 ,  G11B21/00 ,  G11B21/08

CPC classification number: G11B5/5547 ,  G11B21/00 ,  G11B21/081 ,  G11B5/4886 ,  G11B5/5556 ,  G11B7/08505

Abstract: A head positioning system on a recording medium includes a recording medium having a periodic arrangement of data tracks and servo tracks wherein the periodic arrangement having a predetermined period includes N.sub.d (N.sub.d is an integer equal to or larger than 1) number of data tracks and N.sub.s (N.sub.s is an integer equal to or larger than 2) number of servo tracks, the servo tracks having single phase servo patterns, alternatively recorded thereon, a multi-head carrying a plurality of head elements disposed in a direction perpendicular to the tracks, so that the distance between head elements is (N.sub.h +1/M)P where N.sub.h is an integer equal to or larger than O, M is an integer equal to or larger than 2, and P is a track pitch, wherein the multi-head is movable in a direction generally perpendicular to the direction of the tracks, means for selecting a servo head for reading servo tracks and a data head for reading data tracks from the head elements during a seek operation, wherein a selected servo head is selected to reproduce a servo pattern from a servo track and a selected data head is determined based on the selected servo head, and wherein the multi-head is positioned on a servo track in every 1/M track pitch of movement.

Abstract translation: 记录介质上的磁头定位系统包括具有数据磁道和伺服磁道的周期性布置的记录介质，其中具有预定周期的周期性布置包括Nd（Nd是等于或大于1的整数）数据磁道和Ns （Ns是等于或大于2的整数）数量的伺服磁道，伺服磁道具有单相伺服模式，备选地记录在其上，多磁头承载沿垂直于轨道的方向设置的多个磁头元件，因此 头元件之间的距离为（Nh + 1 / M）P，其中Nh为等于或大于O的整数，M为等于或大于2的整数，P为轨道间距，其中多头 可以在大致垂直于轨道方向的方向上移动，用于选择用于读取伺服轨道的伺服磁头的装置和用于在寻道操作期间从磁头元件读取数据磁道的数据磁头，其中所选择的伺服磁头i 被选择以从伺服轨道再现伺服模式，并且基于所选择的伺服头确定所选数据头，并且其中所述多头位于每1 / M个移动轨迹的位置位于伺服轨道上。

公开(公告)号：US4120010A

公开(公告)日：1978-10-10

申请号：US800178

申请日：1977-05-25

Applicant: Yasunaga Mitsuya ,  Shigemitsu Oguchi ,  Wataru Hayakawa ,  Hatsuo Takahashi ,  Gen-ichi Ishida ,  Masayoshi Amasaka

Inventor： Yasunaga Mitsuya ,  Shigemitsu Oguchi ,  Wataru Hayakawa ,  Hatsuo Takahashi ,  Gen-ichi Ishida ,  Masayoshi Amasaka

IPC: G11B21/12 ,  G11B5/60 ,  G11B17/32 ,  G11B21/02 ,  G11B21/20 ,  G11B21/22

CPC classification number: G11B17/32 ,  G11B5/6005

Abstract: At the start of operation, a floating magnetic head is brought into contact with the surface of a magnetic disk and the magnetic disk is then rotated to float the magnetic head off the magnetic disk surface. At the end of operation, the floating magnetic head is drawn away from the magnetic disk surface of the rotating magnetic disk and, after the lapse of a certain period of time, the magnetic disk is stopped. This prevents the floating magnetic head from sticking to the magnetic disk owing to dew condensation, permits easy miniaturization of the floating space and provides for increased recording density.

Abstract translation: 在操作开始时，浮动磁头与磁盘的表面接触，然后旋转磁盘以使磁头从磁盘表面浮起。 在操作结束时，浮动磁头被从旋转磁盘的磁盘表面拉出，经过一段时间后，停止磁盘。 这防止浮动磁头由于结露而粘附到磁盘，从而允许浮动空间容易地小型化并提供增加的记录密度。