Fluid spindle bearing vent

Details Fluid spindle bearing vent Fluid spindle bearing vent

1997-08-11

1999-05-04

Miller, Brian E.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

384112, G11B 1702, F16C 1710

Patent

active

059010134

ABSTRACT:
A vent is disclosed for a screw mounted support shaft of a fluid dynamic bearing for a spindle of a magnetic disk file. The support shaft for mounting a spindle bushing has an axial hollow center internally threaded at one end, and has upper and lower bearing journals for rotatably mounting the spindle bushing with a fluid lubricant. The bearing journals are separated by a recess having a vent passage between the recess and hollow center. A screw is threaded through the base plate or cover into the threaded end of the support shaft, mounting the support shaft to the base plate or cover. An air vent passage, such as a slit is provided axially either in the threaded end of the hollow center of the support shaft or in the screw, and radially across the end of the support shaft so the air bleed passage extends from the hollow center externally of the support shaft.

REFERENCES:
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patent: 4696585 (1987-09-01), Swearingen
patent: 5018881 (1991-05-01), Asada
patent: 5112141 (1992-05-01), Asada et al.
patent: 5120139 (1992-06-01), Asada et al.
patent: 5323076 (1994-06-01), Hajec
patent: 5357163 (1994-10-01), Minakuchi et al.
patent: 5524986 (1996-06-01), Leuthold et al.
patent: 5533811 (1996-07-01), Polch et al.

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