Machine element or mechanism – Control lever and linkage systems – Hand operated
Reexamination Certificate
1999-04-08
2001-03-27
Bucci, David A. (Department: 3682)
Machine element or mechanism
Control lever and linkage systems
Hand operated
C280S775000, C074S501600
Reexamination Certificate
active
06205882
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates generally to a tilt release system for releasing the locking mechanism of a tilt steering column of an automotive vehicle.
A tilt steering column allows an operator of a vehicle to adjust the height and angle of the steering wheel depending on the operator's stature, seat position and comfort. Typically, the steering wheel can be moved to an uppermost position to allow the operator or driver to get in and out of the driver's seat more easily.
A locking mechanism is provided to retain the steering column in an adjusted position. The locking mechanism must be released to adjust the steering column. Typically, the locking mechanism is released by rearward actuation of a lever on the steering column. If the vehicle is involved in a crash of sufficient magnitude to cause collapse of the steering column, there may be a rearward impact on the lever which will accidentally release the locking mechanism. When this happens, the steering wheel will move to its uppermost position due to the large return spring provided for this purpose. In its uppermost position, the steering wheel is in an unfavorable position with respect to the driver should the airbag accidentally deploy. Accordingly, it is highly desirable to maintain the steering wheel locked in a predetermined fixed position without tilting during a crash.
SUMMARY OF THE INVENTION
In accordance with the present invention, a lever is provided to release the locking mechanism for the steering column. The lever pivots downwardly rather than being actuated rearwardly along the axis of the steering column as is typical in current designs. Accordingly, if the lever of this invention is rearwardly impacted in a crash along the axis of the steering column, it will not release because release requires downward pivoting about a substantially horizontal axis extending laterally outwardly from the steering column.
Another feature of this invention is the provision of a sliding snap fit connection between the lever and its pivot pin. If the lever is axially impacted during a crash in a direction along the axis of the steering column, the lever will simply slide or snap off the pivot pin, thereby rendering tilt release impossible.
One object of this invention is to provide a tilt release system for the locking mechanism of a steering column having the foregoing features and capabilities.
Another object is to provide a tilt release system for a steering column which is of simple design and easy to operate.
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Bucci David A.
DaimlerChrysler Corporation
Joyce William C
Shurupoff Lawrence J.
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