US Patent 12134549 Restraint spline for pivoting arm of vehicle lift

A vehicle engagement assembly includes a base frame, a lift arm pivotally coupled to the base frame, and a pivot restraint mechanism that can inhibit rotation of the lift arm relative to the base frame about a pivot axis while the pivot restraint mechanism is in a restrained configuration. The base frame includes a first pair of flanges and a web connecting the first pair of flanges. The pivot restraint mechanism includes an arm restraint body and a base frame restraint body. The arm restraint body is associated with the lift arm such that the arm restraint body pivots with the lift arm relative to the base frame. The base frame restraint body is associated with the base frame and includes a rotational stopping surface that engages with the web to thereby transfer a rotational load from the lift arm onto the web in the restrained configuration.