Disk drive device

Details Disk drive device Disk drive device

2005-08-30

2005-08-30

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S069000

Reexamination Certificate

active

06937417

ABSTRACT:
A disk drive device in which emergency unloading at the start of the engine is prevented, a head may have a prolonged life and improved reliability as an HDD is achieved. A disk drive device is driven or the movement of a magnetic head is allowed after an engine start in a vehicle is detected by an engine start detecting part, so that emergency unloading can be prevented at the start of the engine. In order to detect the engine start, voltage values on four power supply lines for a vehicle power supply device are monitored or the outputs of various sensors such as a tachometer, a vibration detection sensor, an engine sound detection sensor, a vehicle speed pulse, a gyro sensor and a parking brake are monitored. In another embodiment, the number of emergency unloading occurrence at the start of the engine is reduced, which allows the head to have a prolonged life, so that the disk drive device has improved reliability as an HDD. The voltage values on two power supply lines, first and second power supply lines for a vehicle power supply device are monitored. The magnetic head is allowed to move when the voltage values on the first and second power supply lines attain a prescribed value after a prescribed time period after the voltage value on the first power supply line attains prescribed value.

REFERENCES:
patent: 4580222 (1986-04-01), Fujii
patent: 4701902 (1987-10-01), Aoyagi et al.
patent: 4758959 (1988-07-01), Thoone et al.
patent: 4766580 (1988-08-01), Go et al.
patent: 4786995 (1988-11-01), Stupeck et al.
patent: 4860124 (1989-08-01), Adams
patent: 4862364 (1989-08-01), Matsuda
patent: 4891760 (1990-01-01), Kashiwazaki et al.
patent: 5467277 (1995-11-01), Fujisawa et al.
patent: 5550738 (1996-08-01), Bailey et al.
patent: 5794164 (1998-08-01), Beckert et al.
patent: 5889629 (1999-03-01), Patton, III
patent: 6236918 (2001-05-01), Sonoda et al.
patent: 6335910 (2002-01-01), Yoshizawa et al.
patent: 6427103 (2002-07-01), Kobayashi et al.
patent: 6434459 (2002-08-01), Wong et al.
patent: 6442461 (2002-08-01), Matsuo
patent: 6546456 (2003-04-01), Smith et al.
patent: 6633448 (2003-10-01), Smith et al.
patent: 0 962 928 (1999-12-01), None
patent: 5-157573 (1993-06-01), None
patent: 2000-293923 (2000-10-01), None

Affiliated with

Also associated with

Rating

Disk drive device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Disk drive device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disk drive device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3491461