Patents by Inventor Dieter Elsässer
Dieter Elsässer 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: 5949164Abstract: A compact disk storage device having outer-rotor electric motor for directly driving a disk for recording and reproducing information has an axially deep, tank-form flange and a stationary shaft, upon which the mounting annulus of the flange and the ball bearings of the hub are axially displaced. The hub includes a cover disk for sealing an extremity of the ball bearings and an inverted cup shape rotor providing magnetic shielding. The flange includes a mounting rim substantially aligned with the back surface of the cup-shape rotor. The facing cup-like and tank-form shapes readily enable labyrinth seals and substantial and abutting axial extents along the axis of the stationary shaft.Type: GrantFiled: August 20, 1997Date of Patent: September 7, 1999Assignee: Papst Licensing GmbHInventors: Heinrich Cap, Dieter Elsaesser, Ulrich Koletzki, Georg Papst
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Patent number: 5864443Abstract: A disk storage drive is provided with a brushless drive motor having a stator with a winding. An external rotor coaxially surrounds the stator and is spaced therefrom by a substantially cylindrical air gap. The rotor includes a permanent magnet and a soft magnetic yoke. A hub is provided that is concentric to the yoke and is connected to the rotor for rotation therewith. The hub has a disk mounting portion on its outer peripheral surface that can be passed through the central opening of a standardized storage disk for mounting the storage disks for rotation therewith. At least half of the axial longitudinal dimension of the stator winding and the rotor magnet interacting therewith is housed within the disk mounting portion of the hub. The hub is made from a non-ferromagnetic material that is suitable for storage drive clean chamber use after dimensional finishing of the hub.Type: GrantFiled: February 20, 1998Date of Patent: January 26, 1999Assignee: Papst Licensing, GmbHInventors: Dieter Elsaesser, Johann von der Heide
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Patent number: 5801900Abstract: A disk storage device including a housing surrounding a clean chamber, at least one storage disk having a central opening, at least one data head mounted on the housing for movement in operative relationship with the disk within the clean chamber, and motor elements for rotating the disk within the clean chamber. The motor elements include a rotatable member positioned within the clean chamber. The rotatable member has a cylindrical outer surface portion that extends into the central opening of the storage disk and is supported by a shaft and bearing system. A stator including magnetically active parts is mounted on a support member, which also supports the shaft and bearing system. The stator has a magnetic flux-producing section having poles positioned on the same side of the support member as the rotatable member.Type: GrantFiled: June 6, 1995Date of Patent: September 1, 1998Assignee: Papst Licensing GmbHInventors: Dieter Elsaesser, Johann Von Der Heide, Rolf Muller
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Patent number: 5774302Abstract: A disk storage drive for a disk storage device having a clean chamber for a storage disk having a central opening is provided with a brushless drive motor. The drive motor includes a stator and a winding on the stator and further includes a shaft aligned with the rotation axis of said motor, and a magnetically conducting member supported for rotation about the rotation axis and having an inner wall coaxially surrounding the stator. A magnet fixed to the inner wall of the magnetically conducting member is radially spaced from the stator. The disk storage device further includes a hub positioned within the clean chamber and contiguous with the magnetically conducting member so that the hub and the magnetically conducting member together form an outer rotor of the drive motor. The outer rotor has a radially extending flange having a surface which supports said storage disk.Type: GrantFiled: June 6, 1995Date of Patent: June 30, 1998Assignee: Papst Licensing, GmbHInventors: Dieter Elsaesser, Johann Von Der Heide
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Patent number: 5557487Abstract: A disk storage device having a clean chamber for a storage disk having a central opening is provided with a brushless drive motor. The drive motor includes a stator and a winding on the stator and further includes a shaft aligned with the rotation axis of said motor, and a magnetically conducting member supported for rotation about the rotation axis and having an inner wall coaxially surrounding the stator. A magnet fixed to the inner wall of the magnetically conducting member is radially spaced from the stator. The disk storage device further includes a hub positioned within the clean chamber and contiguous with the magnetically conducting member so that the hub and the magnetically conducting member together form an outer rotor of the drive motor. The outer rotor has a radially extending flange having a surface which supports said storage disk.Type: GrantFiled: May 30, 1995Date of Patent: September 17, 1996Assignee: Papst Licensing GmbHInventors: Dieter Elsaesser, Johann von der Heide
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Patent number: 5552650Abstract: A compact outer-rotor electric motor that can be used for directly driving a disk for recording and reproducing information has an axially deep, tank-form flange and a stationary shaft, upon which the mounting annulus of the flange and the ball bearings of the hub are axially displaced. The hub includes a cover disk for sealing an extremity of the ball bearings and an inverted cup shape rotor providing magnetic shielding. The flange includes a mounting rim substantially aligned with the back surface of the cup-shape rotor. The facing cup-like and tank-form shapes readily enable labyrinth seals, comprising seals of the lower bearings.Type: GrantFiled: February 25, 1994Date of Patent: September 3, 1996Assignee: Papst Licensing GmbHInventors: Heinrich Cap, Dieter Elsaesser, Ulrich Koletzki, Georg Papst
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Patent number: 5446610Abstract: A disk storage device having a clean chamber for a storage disk having a central opening is provided with a brushless drive motor. The drive motor includes a stator and a winding on the stator and further includes a shaft aligned with the rotation axis of said motor, and a magnetically conducting member supported for rotation about the rotation axis and having an inner wall coaxially surrounding the stator. A magnet fixed to the inner wall of the magnetically conducting member is radially spaced from the stator. The disk storage device further includes a hub positioned within the clean chamber and contiguous with the magnetically conducting member so that the hub and the magnetically conducting member together form an outer rotor of the drive motor. The outer rotor has a radially extending flange having a surface which supports said storage disk.Type: GrantFiled: April 19, 1993Date of Patent: August 29, 1995Assignee: Papst Licensing GmbHInventors: Dieter Elsaesser, Johann von der Heide
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Patent number: 5422769Abstract: A disk storage drive is provided with a brushless drive motor having a stator with a winding. An external rotor coaxially surrounds the stator and is spaced therefrom by a substantially cylindrical air gap. The rotor includes a permanent magnet and a soft magnetic yoke. A hub is provided that is concentric to the yoke and is connected to the rotor for rotation therewith. The hub has a disk mounting portion on its outer peripheral surface that can be passed through the central opening of a standardized storage disk for mounting the storage disks for rotation therewith. At least half of the axial longitudinal dimension of the stator winding and the rotor magnet interacting therewith is housed within the disk mounting portion of the hub. The hub is made from a non-ferromagnetic material that is suitable for storage drive clean chamber use after dimensional finishing of the hub.Type: GrantFiled: April 14, 1994Date of Patent: June 6, 1995Assignee: Papst Licensing GmbHInventors: Dieter Elsaesser, Johann Von Der Heide
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Patent number: 5216557Abstract: A disk storage drive is provided with a brushless drive motor having a stator with a winding. An external rotor coaxially surrounds the stator and is spaced therefrom by a substantially cylindrical air gap. The rotor includes a permanent magnet and a soft magnetic yoke. A hub is provided that is concentric to the yoke and is connected to the rotor for rotation therewith. The hub has a disk mounting portion on its outer peripheral surface that can be passed through the central opening of a standardized storage disk for mounting the storage disks for rotation therewith. At least half of the axial longitudinal dimension of the stator winding and the rotor magnet interacting therewith is housed within the disk mounting portion of the hub. The hub is made from a non-ferromagnetic material that is suitable for storage drive clean chamber use after dimensional finishing of the hub.Type: GrantFiled: May 15, 1992Date of Patent: June 1, 1993Assignee: PAPST-MOTOREN GmbH & Co. KGInventors: Dieter Elsaesser, Johann von der Heide
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Patent number: 5128819Abstract: A disk storage drive is provided with a brushless drive motor having a stator with a winding. An external rotor coaxially surrounds the stator and is spaced therefrom by a substantially cylindrical air gap. The rotor includes a permanent magnet and a soft magnetic yoke. A hub is provided that is concentric to the yoke and is connected to the rotor for rotation therewith. The hub has a disk mounting portion on its outer peripheral surface that can be passed through the central opening of a standardized storage disk for mounting the storage disks for rotation therewith. At least half of the axial longitudinal dimension of the stator winding and the rotor magnet interacting therewith is housed within the disk mounting portion of the hub. The hub is made from a non-ferromagnetic material that is suitable for storage drive clean chamber use after dimensional finishing of the hub.Type: GrantFiled: April 9, 1991Date of Patent: July 7, 1992Assignee: Papst-Motoren GmbH & Co. KGInventors: Dieter Elsaesser, Johann von der Heide
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Patent number: 4779165Abstract: A disk storage drive is provided with a brushless drive motor having a stator with a winding. An external rotor coaxially surrounds the stator and is spaced therefrom by a substantially cylindrical air gap. The rotor includes a permanent magnet and a soft magnetic yoke. A hub is provided that is concentric to the yoke and is connected to the rotor for rotation therewith. The hub has a disk mounting portion on its outer peripheral surface that can be passed through the central opening of a standardized storage disk for mounting the storage disks for rotation therewith. At least half of the axial longitudinal dimension of the stator winding and the rotor magnet interacting therewith is housed within the disk mounting portion of the hub. The hub is made from a non-ferromagnetic material that is suitable for storage drive clean chamber use after dimensional finishing of the hub.Type: GrantFiled: March 31, 1987Date of Patent: October 18, 1988Assignee: Papst-Motoren GmbH & Co. KGInventors: Dieter Elsaesser, Johann von der Heide
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Patent number: 4519010Abstract: A driving mechanism for magnetic hard disc memories includes an isolated space for maximum cleanness, a driving motor mounted within the apparatus and having a stator and a rotor, the motor when energized having parts producing magnetic flux, a hub extending into the space of maximum cleanness for receiving therein at least one magnetic hard memory disc, a connection between the motor and the hub for driving the hub, a magnetic flux shield located between the parts producing the magnetic flux and the space of maximum cleanness, and the rotor being detachably connected to the rotor shaft.Type: GrantFiled: December 2, 1981Date of Patent: May 21, 1985Assignee: Papst-Motoren GmbH & Co. KGInventors: Dieter Elsaesser, Johann von der Heide, Rolf Muller, Georg Papst
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Patent number: RE38772Abstract: A disk memory drive includes a brushless drive outer rotor motor having an internal space and a stator with windings. The outer rotor coaxially encircles the stator and a substantially cylindrical air gap is defined between the stator and the rotor. The rotor includes permanent magnets and a hub fixedly connected with the magnet. A disk mounting section is provided on the hub for accommodating at least one storage disk positioned in a clear space, the mounting section being adapted to extend through a central aperture of the storage disk. The windings and the magnets interacting with the windings are disposed for at least half of the axial longitudinal dimension thereof within a space surrounded by the disk mounting section of the hub. Bearings rotatably mount the rotor and the hub.Type: GrantFiled: November 17, 1999Date of Patent: August 9, 2005Assignee: Papst Licensing GmbH & Co. KGInventors: Dieter Elsässer, Johann von der Heide, Rolf Müller
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Patent number: RE38178Abstract: A disk memory drive includes a brushless drive outer rotor motor having an internal space and a stator with windings. The outer rotor coaxially encircles the stator and a substantially cylindrical air gap is defined between the stator and the rotor. The rotor includes permanent magnets and a hub fixedly connected with the magnet. A disk mounting section is provided on the hub for accommodating at least one storage disk positioned in a clear space, the mounting section being adapted to extend through a central aperture of the storage disk. The windings and the magnets interacting with the windings are disposed for at least half of the axial longitudinal dimension thereof within a space surrounded by the disk mounting section of the hub. Bearings rotatably mount the rotor and the hub.Type: GrantFiled: June 18, 1999Date of Patent: July 8, 2003Assignee: Papst Licensing GmbH & Co. KGInventors: Dieter Elsässer, Johann von der Heide, Rolf Müller
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Patent number: RE38179Abstract: A disk memory drive includes a brushless drive outer rotor motor having an internal space and a stator with windings. The outer rotor coaxially encircles the stator and a substantially cylindrical air gap is defined between the stator and the rotor. The rotor includes permanent magnets and a hub fixedly connected with the magnet. A disk mounting section is provided on the hub for accommodating at least one storage disk positioned in a clear space, the mounting section being adapted to extend through a central aperture of the storage disk. The windings and the magnets interacting with the windings are disposed for at least half of the axial longitudinal dimension thereof within a space surrounded by the disk mounting section of the hub. Bearings rotatably mount the rotor and the hub.Type: GrantFiled: June 18, 1999Date of Patent: July 8, 2003Assignee: Papst Licensing GmbH & Co. KGInventors: Dieter Elsässer, Johann von der Heide, Rolf Müller
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Patent number: RE38601Abstract: A disk memory drive includes a brushless drive outer rotor motor having an internal space and a stator with windings. The outer rotor coaxially encircles the stator and a substantially cylindrical air gap is defined between the stator and the rotor. The rotor includes permanent magnets and a hub fixedly connected with the magnet. A disk mounting section is provided on the hub for accommodating at least one storage disk positioned in a clear space, the mounting section being adapted to extend through a central aperture of the storage disk. The windings and the magnets interacting with the windings are disposed for at least half of the axial longitudinal dimension thereof within a space surrounded by the disk mounting section of the hub. Bearings rotatably mount the rotor and the hub.Type: GrantFiled: June 18, 1999Date of Patent: September 28, 2004Assignee: Papst Licensing, GmbH & Co. KGInventors: Dieter Elsässer, Johann von der Heide, Rolf Müller
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Patent number: RE38673Abstract: A disk memory drive includes a brushless drive outer rotor motor having an internal space and a stator with windings. The outer rotor coaxially encircles the stator and a substantially cylindrical air gap is defined between the stator and the rotor. The rotor includes permanent magnets and a hub fixedly connected with the magnet. A disk mounting section is provided on the hub for accommodating at least one storage disk positioned in a clear space, the mounting section being adapted to extend through a central aperture of the storage disk. The windings and the magnets interacting with the windings are disposed for at least half of the axial longitudinal dimension thereof within a space surrounded by the disk mounting section of the hub. Bearings rotatably mount the rotor and the hub.Type: GrantFiled: June 18, 1999Date of Patent: December 21, 2004Assignee: Papst Licensing GmbH & Co. KGInventors: Dieter Elsässer, Johann von der Heide
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Patent number: RE34412Abstract: A disk storage drive is provided with a brushless drive motor having a stator with a winding. An external rotor coaxially surrounds the stator and is spaced therefrom by a substantially cylindrical air gap. The rotor includes a permanent magnet and a soft magnetic yoke. A hub is provided that is concentric to the yoke and is connected to the rotor for rotation therewith. The hub has a disk mounting portion on its outer peripheral surface that can be passed through the central opening of a standardized storage disk for mounting the storage disks for rotation therewith. At least half of the axial longitudinal dimension of the stator winding and the rotor magnet interacting therewith is housed within the disk mounting portion of the hub. The hub is made from a non-ferromagnetic material that is suitable for storage drive clean chamber use after dimensional finishing of the hub.Type: GrantFiled: October 18, 1990Date of Patent: October 19, 1993Assignee: Papst-Motoren GmbH & Co. KGInventors: Dieter Elsaesser, Johann von der Heide