Dynamic pressure bearing apparatus and head drum assembly of a v

Details Dynamic pressure bearing apparatus and head drum assembly of a v Dynamic pressure bearing apparatus and head drum assembly of a v

1996-10-28

1998-05-19

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

384123, G11B 2300

Patent

active

057543747

ABSTRACT:
Disclosed is a lubricating apparatus which can compensate for the radial load and the thrust load of the shaft. The lubricating apparatus includes a housing formed at an inner portion thereof with a pair of lubricant containing grooves, a journal bearing inserted into the housing, and lubricating pads having a lubricant therein. The lubricating pads are inserted into the lubricant containing grooves. A head drum assembly for a video cassette recorder is also disclosed. The assembly has a lower drum, an upper drum, a motor for generating a driving force, a shaft for transferring the driving force of the motor to the upper drum, and a bearing rotatably supporting the shaft. By compensating the radial load and thrust load of the shaft, jittering and wow-fluttering can be prevented while recording a screen information on a magnetic tape or reproducing the screen information from the magnetic tape.

REFERENCES:
patent: 4892418 (1990-01-01), Asada et al.
patent: 4972283 (1990-11-01), Kim
patent: 5277499 (1994-01-01), Kameyama
patent: 5323076 (1994-06-01), Hajec
patent: 5407281 (1995-04-01), Chen
patent: 5453892 (1995-09-01), Hasegawa et al.
patent: 5533814 (1996-07-01), Slocum
patent: 5581425 (1996-12-01), Choi

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