B - Operations – Transporting – 62 – D
Patent
B - Operations, Transporting
62
D
B62D 1/19 (2006.01) B60R 25/02 (2006.01)
Patent
CA 2141177
A motor vehicle steering column 10, Figure 2, including a tubular lower mast jacket 12 anchored on a vehicle body, a tubular upper mast jacket 14 telescoped inside the tubular lower mast jacket, a plurality of steel spheres 44 interference fitted in an annulus 38 defined at an overlap between the mast jackets, and a plastic ball sleeve 40 in the annulus having pockets 42 loosely receiving respective ones of the steel spheres. The ball sleeve has a plurality of notches 50A,50B in an edge 46 thereof exposed through an outboard end 22 of the lower mast jacket. An anti- rotation bracket 54 is welded to a stationary mounting bracket 20 attached to the lower mast jacket and includes a plurality of tangs 60A,60B which project through the outboard end of the lower mast jacket into respective ones of the notches 50A,50B in the ball sleeve whereby rotation of the ball sleeve about a longitudinal centerline of the steering column is positively foreclosed. With the ball sleeve blocked against rotation, the magnitude of turning moment which must be applied to the upper mast jacket to twist it relative to the lower mast jacket, e.g. to defeat an anti-theft system on the steering column, is sufficient to prevent defeat of the anti-theft system without also causing collateral steering column damage sufficient to render the vehicle undriveable anyway.
Schneider Douglas M.
Tuggle Robert E.
General Motors Corporation
Gowling Lafleur Henderson Llp
LandOfFree
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