Electric steering lock

Details Electric steering lock Electric steering lock

2006-12-19

2006-12-19

Sircus, Brian (Department: 2836)

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

C070S186000, C070S276000, C324S207200, C324S207240

Reexamination Certificate

active

07151324

ABSTRACT:
The invention relates to an electric steering lock wherein a permanent magnet (20) and two different Hall sensors (21,22) are used to recognise a locking and an unlocking position. The pole transition (23) of the magnet (20) is oriented in the direction of the lift (14). In order to increase efficiency, one sensor (21) is south-pole active and the other (22) is north-pole active. The sensors (21,22) are arranged in an intermediate area (25) between both end positions (10.1, 10.2) of the pole transition (23) of the permanent magnet (20) and are disposed at a defined end distance (38, 39) from both end positions (10.1, 10.2). At said end distance (10.1), the N-active sensor (21) is oriented towards the north pole and the S-active sensor (22) is oriented towards the south pole of the permanent magnet. Said end distance (38, 39) corresponds to the distance at which the magnetic flow density (30.1) of the permanent magnet (20) is at least identical to the threshold value (21.1) required to turn on (28.1, 29.1) the N or-S-active sensor (21) at the highest temperature occurring during the use thereof.

REFERENCES:
patent: 5084674 (1992-01-01), Lachmann et al.
patent: 5865049 (1999-02-01), Friedrich et al.
patent: 6236121 (2001-05-01), Kemmann et al.
patent: 6380642 (2002-04-01), Buchner
patent: 2003/0145663 (2003-08-01), Heisenberg et al.
patent: 198 09 295 (1999-05-01), None
patent: 0100462 (2001-01-01), None

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