| Patent Number |
Title Of Patent |
Date Issued |
| RE39076 |
Apparatus and method for controlling brushless electric motors and position encoders and indicat |
April 25, 2006 |
| A brushless direct current motor is energized by a power stage. Switches of the power stage are selectively switched by an electronic control device. In order to determine the correct commutation pattern, without using rotor position indicators such as Hall effect devices, the control |
| RE38772 |
Disk storage device having an undercut hub member |
August 9, 2005 |
| 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 a |
| RE38673 |
Disk storage device having a hub sealing member feature |
December 21, 2004 |
| 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 a |
| RE38662 |
Disk storage device having a sealed bearing tube |
November 30, 2004 |
| 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 a |
| RE38601 |
Disk storage device having a radial magnetic yoke feature |
September 28, 2004 |
| 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 a |
| RE38179 |
Disk storage device having a three-phase brushless DC underhub configured spindle motor |
July 8, 2003 |
| 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 a |
| RE38178 |
Disk storage device having an underhub spindle motor |
July 8, 2003 |
| 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 a |
| RE37058 |
Disk storage device having contamination seals |
February 20, 2001 |
| 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 a |
| RE36168 |
Brushless DC drive motor with external rotor for use in disc drives and like devices |
March 30, 1999 |
| A brushless DC drive motor with an external rotor has three pole shoes on a substantially ring-shaped stator for each two poles on the rotor. The stator winding is commutated by a three-phase commutation network in such a fashion that first, second and third networks in the stator windin |
| RE35792 |
Disk storage drive |
May 12, 1998 |
| A disk memory drive includes a brushless drive outer rotor motor having an internal space and a stator with windings. The outer rotor coolly encircles the stator and a substantially cylindrical air gap is defined between the stator and the rotor. The rotor includes permanent magnets and |
| RE34412 |
Disk storage drive having motor drive with non-corrodible hub |
October 19, 1993 |
| 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 |
| RE33813 |
Electric motor, particularly a brushless direct current motor |
February 4, 1992 |
| Electric motor with a substantially cylindrical air gap between the stator and the rotor, the stator being fitted to a bearing support for the rotor shaft bearing. In order to reduce noise emissions, the stator is connected to the bearing support by means of an elastic damper and the sta |
| 7059212 |
Arrestable tensioning device, in particular for a parking brake system |
June 13, 2006 |
| An arrestable tensioning device 10, in particular for a parking brake system, is described. The tensioning device 10 comprises an actuating device 20, a tensioning element 40 coupled to the actuating device 20 for executing a tensioning motion, and a releasable arresting device 60 for |
| 7015605 |
Electromotive drive system for use with a pump of a power-assisted steering system in a motor ve |
March 21, 2006 |
| An electromotive drive is provided, especially for the pump of a power-assisted steering system of a motor vehicle. The drive includes a housing (3) with a bearing journal (15) in which the shaft (18) of a rotor (9) is rotationally mounted. The drive also includes a stator (7) having |
| 6762521 |
Drive unit for a fan in a vehicle |
July 13, 2004 |
| A drive unit for fans in vehicles has a brushless DC motor and an electronic actuation system. The electronic actuation system is surrounded by a housing made of plastics that supports the DC motor. The housing has an integrally molded bearing sleeve for mounting the rotor of the DC |
| 6634480 |
Driving device |
October 21, 2003 |
| The driving device has a rotatable drive disc (16) that is coupled to a motor (10) and, arranged coaxially with the drive disc, a locking disc (20) that can be rotated to a limited extent relative to the drive disc. The locking disc has detent teeth on its outer circumference. A pawl (30 |
| 5864443 |
Disk storage device having a detachable coupling ring in the hub |
January 26, 1999 |
| 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 |
| 5801900 |
Disk storage device, with hub and drive motor rotor features |
September 1, 1998 |
| 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 |
| 5774302 |
Spin drive motor for a disk storage device |
June 30, 1998 |
| 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 mo |
| 5661351 |
Disc drive having a brushless DC drive motor with an external rotor for supporting one or more s |
August 26, 1997 |
| A disc drive having a housing which encloses a clean room that is provided with a brushless DC drive motor having an external rotor and three pole shoes on a substantially ring-shaped stator for each two pole on the rotor. The stator winding is commutated by a three-phase commutation |
| 5652470 |
Brushless DC drive motor with external rotor for use in disc drives and like devices |
July 29, 1997 |
| A brushless DC drive motor with an external rotor has three pole shoes on a substantially ring-shaped stator for each two poles on the rotor. The stator winding is commutated by a three-phase commutation network in such a fashion that first, second and third networks in the stator windin |
| 5557487 |
Disk storage drive having particular diameter relationship and axial compactness |
September 17, 1996 |
| 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 |
| 5446610 |
Disk storage device having a brushless DC drive motor |
August 29, 1995 |
| 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 |
| 5422769 |
Spin motor for rotating a storage disk in a disk drive |
June 6, 1995 |
| 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 |
| 5382853 |
Brushless DC drive motor with external rotor for use in disc drives and like devices |
January 17, 1995 |
| A brushless DC drive motor with an external rotor has three pole shoes on a substantially ring-shaped stator for each two poles on the rotor. The stator winding is commutated by a three-phase commutation network in such a fashion that first, second and third networks in the stator windin |
| 5280222 |
Apparatus and method for controlling brushless electric motors and position encoders and indicat |
January 18, 1994 |
| A brushless direct current motor is energized by a power stage. Switches of the power stage are selectively switched by an electronic control device. In order to determine the correct commutation pattern, without using rotor position indicators such as Hall effect devices, the control de |
| 5225746 |
Apparatus and method for controlling brushless electric motors |
July 6, 1993 |
| A brushless direct current motor is energized by a power stage. Switches of the power stage are selectively switched by an electronic control device. In order to determine the correct commutation pattern, without using rotor position indicators, the control device is arranged to tap the |
| 5216557 |
Disk storage device having a brushless DC drive motor |
June 1, 1993 |
| 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 |
| 5204621 |
Position sensor employing a soft magnetic core |
April 20, 1993 |
| A position sensor using a soft magnetic core and a permanent magnet for detecting linear or rotary movements of a part. In one embodiment, a differential transformer is provided with corresponding windings 3, 4 and 5, which are wound on a tubular carrier member 2. Provided inside the |
| 5173814 |
Disk storage drive having internal electrical connection passages and contamination seals at end |
December 22, 1992 |
| 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 a |
| 5128819 |
Disk storage drive with radially extending motor shield |
July 7, 1992 |
| 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 |
| 5117128 |
Motor with both stepped rotary and axial shift motions |
May 26, 1992 |
| A step motor which, in addition to an exciter system for step-by-step movement, is provided with a further exciter system. As a result of the direct or indirect influence of the magnetic field generated by the secondary exciter system on the rotor which is supported so as to be able |
| 5040085 |
Disk storage drive directed to disk drive details |
August 13, 1991 |
| 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 |
| 5006943 |
Disk storage drive |
April 9, 1991 |
| 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 |
| 4920292 |
Motor having rotor capable of both stepped rotary and axial shift motions |
April 24, 1990 |
| A step motor which, in addition to an exciter system for step-by-step movement, is provided with an axial exciter system. As a result of the direct or indirect influence of the magnetic field generated by the secondary exciter system on the rotor which is supported, so as to be able |
| 4894738 |
Disk storage drive |
January 16, 1990 |
| 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 a |
| 4882511 |
Brushless three-phase D.C. motor |
November 21, 1989 |
| Collectorless (brushless) three-phase DC motor having a permanent-magnet arrangement and a three-phase winding, these being movable relative to each other, and having three position sensors which are stationary relative to the winding and controlled by the permanent-magnet arrangement |
| 4843500 |
Disk storage drive |
June 27, 1989 |
| 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 a |
| 4779165 |
Disk storage drive |
October 18, 1988 |
| 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 |
| 4734603 |
Motor control mounting |
March 29, 1988 |
| To lessen mounting time and to optimize positioning of the Hall generator, the Hall generator and control electronics influenced by the generator so as to actuate a brushless dc motor are arranged on a common substrate and are provided with a common protective envelope whose dimensions a |
| 4647803 |
Electric motor, particularly a brushless direct current motor |
March 3, 1987 |
| Electric motor with a substantially cylindrical air gap between the stator and the rotor, the stator being fitted to a bearing support for the rotor shaft bearing. In order to reduce noise emissions, the stator is connected to the bearing support by means of an elastic damper and the sta |
| 4638192 |
Linear DC motor |
January 20, 1987 |
| In line DC motor with a permanent magnet arrangement displaying a ferromagnetic ground and a multi-strand winding, which are linearly moveable with respect to one another, in particular for drives in data engineering. The winding consists of several coils following one another in the |
| 4556829 |
Drive arrangement for signal processing equipment |
December 3, 1985 |
| Drive for signal processing equipment includes a direct drive brushless D.C. motor having a rotor with a permanent magnet formed of at least two pairs of poles and an additional magnet creating a flux discontinuity in the form of a field strength increase, at least one stationary magneti |
