Patent attributes
A steering column locking mechanism 130 includes a piston 176 located in a chamber in a housing 178. The locking mechanism 130 is in an engaged condition locking the steering column 10 against movement relative to a frame of a vehicle when the piston 176 is in a first position (FIG. 2). The locking mechanism 130 is in a disengaged condition in which the locking mechanism is ineffective to lock the steering column 10 when the piston is in a second position (FIG. 3). The first pressure is continuously applied to a relatively small area on a first side 256 of the piston 176 to retain the piston in the first position and to retain the locking mechanism 130 in the engaged condition. Pressure is applied to a relatively large area on a second side 272 of the piston 176 to move the piston from the first position to the second position against the influence of the first pressure.
