Claims
- of the bell-shaped outer rotor..!..�.7. A disk memory drive according to claim 1, wherein the internal space of the motor is sealed by means of a cover located at the open end of the outer rotor, the cover also serving as a bearing mounting flange, and the rotational position indicator means being mounted on the outside of the motor cover with respect to the sealed inner space of the motor..!..�.8. A disk memory drive according to claim 1, wherein the outer rotor includes an outer rotor casing of ferromagnetic material, the outer rotor serving also as the hub, the rotational position indicator being mounted on a lower part of the hub outside the sealed inner space of the motor..!..�.9. A disk memory drive according to claim 1, wherein further comprising a bearing mounting flange having projections in the actual axial direction that project into the disk-shaped ring member, and a labyrinth seal located between the projections and the ring member formed by a combination of cylindrical and radially flat gaps having only dimensions of normal clearances between moving parts..!..�.10. A disk memory drive according to claim 9, wherein the projections on the bearing mounting flange are rectangular in section and extend axially..!..�.11. A disk memory drive according to claim 9, wherein the ring member on which part of the bearing race is mounted is substantially flush in the axial direction with the mounting flange, the ring member
- being inserted in the outer rotor casing that forms the hub..!.12. A disk memory drive having a brushless drive motor, comprising a stator having a predetermined axial extension, a coaxially positioned outer rotor and circling the stator and defining therebetween a substantially cylindrical air gap, the rotor having a predetermined axial extension, a cylindrically shaped permanent motor magnet disposed adjacent the air gap on the inner circumference of the rotor to rotate therewith and magnetically interact with the stator, a hub on the outer circumference of the rotor firmly fixed to the motor magnet, the hub being provided on its outer circumference with a disk mounting section which extends through the central opening in a storage disk to mount the disk and allowing at least one storage disk to be accommodated thereon, a clean chamber surrounding the disk mounting section to contain the mounted disk therein, at least half of the axial extension of both the stator winding and of the motor magnet interacting therewith being positioned within the space encompassed by the disk mounting section of the hub, a stationary shaft having upper and lower bearing means mounted thereon for rotatably mounting the rotor with hub on the shaft, and seals located axially above the upper and below the lower bearings for sealing the space therebetween from the outer clean
- chamber. 13. A disk memory drive according to claim 12, wherein the seals
- are magnetic liquid seals. 14. A disk memory drive according to claim 12, wherein the stationary shaft projects axially externally of the upper and
- lower seals. 15. A disk memory drive according to claim 12, wherein the
- seals are labyrinth seals. 16. A disk memory drive according to claim 15, wherein the labyrinth seal is formed of a member having a substantially L-shaped cross section being mounted on and extending radially from the stationary shaft, the short leg of the L-shaped member extending axially
- outwardly. 17. A disk memory drive according to claim .�.15,.!. .Iadd.16 .Iaddend.further including a ring member of L-shaped cross section being provided on the rotor and being opposite and complementary to the stationary mounted L-shaped member, the longer leg of the L-shaped member on the rotor extending inwardly toward the stationary shaft with only a
- clearance dimension separating the two parts. 18. A disk memory drive according to claim .�.15,.!. .Iadd.17 .Iaddend.wherein the stationary L-shaped member lies inboard axially and is substantially encompassed by the rotating L-shaped ring, a flat radial labyrinth gap being formed radially between the respective short legs of the L-shaped members.
Priority Claims (3)
Number |
Date |
Country |
Kind |
3135385 |
Sep 1981 |
DEX |
|
26801/84 |
Jun 1984 |
CHX |
|
13741 |
Mar 1985 |
CHX |
|
BACKGROUND OF THE INVENTION
This application is a continuation-in-part of application Ser. No. 038,049, filed Apr. 14, 1987, .Iadd.now U.S. Pat. No. 4,843,500, .Iaddend.which is a continuation-in-part of application Ser. No. 767,671, filed Aug. 21, 1985, now U.S. Pat. No. 4,658,312, issued Apr. 14, 1987, which is a continuation of application Ser. No. 412,093, filed Aug. 27, 1982, now abandoned. .Iadd.This application also is a continuation-in-part of application Ser. No. 32,954, filed Mar. 31, 1987, now U.S. Pat. No. 4,779,165, which is a continuation of application Ser. No. 733,231, filed May 10, 1985, now abandoned, which is a continuation-in-part of application Ser. No. 412,093, filed Aug. 27, 1982, now abandoned. .Iaddend.
US Referenced Citations (23)
Foreign Referenced Citations (5)
Number |
Date |
Country |
3538480 |
Apr 1986 |
DEX |
58-30312 |
Mar 1979 |
JPX |
61-20871 |
Sep 1982 |
JPX |
61-34771 |
Feb 1986 |
JPX |
2166586 |
May 1986 |
GBX |
Non-Patent Literature Citations (2)
Entry |
"Who needs high capacities?", M. Pearce, Computer Systems, Nov. 1993, pp. 81-84. |
"Motor in spindle gives micro-Winchester room for 140M bytes", J. Swartz, Mini-Micro Systems, Feb. 1983, pp. 143-144, 147-148. |
Related Publications (1)
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Number |
Date |
Country |
|
32954 |
Mar 1987 |
|
Continuations (2)
|
Number |
Date |
Country |
Parent |
733231 |
May 1985 |
|
Parent |
412093 |
Aug 1982 |
|
Continuation in Parts (3)
|
Number |
Date |
Country |
Parent |
38049 |
Apr 1987 |
|
Parent |
412093 |
Aug 1982 |
|
Parent |
767671 |
Aug 1985 |
|
Reissues (1)
|
Number |
Date |
Country |
Parent |
201736 |
Jun 1988 |
|