Patent ID: 7278672

Claim:
A motor vehicle comprising: a vehicle frame; and a direction-lockable seat assembly including an upright seat post mounted on said vehicle frame and defining a pivot axis, a seat member mounted on top of said seat post such that said seat member is rotatable relative to said seat post about the pivot axis, and a direction-locking device including a locking plate having a plate body mounted on top of said seat post, said plate body having an outer periphery and being formed with a plurality of locking grooves that are angularly spaced apart from each other relative to the pivot axis and that extend in radial inward directions from said outer periphery of said plate body toward the pivot axis, a slide guide unit mounted on said seat member and formed with a slide channel to be aligned with a selected one of said locking grooves, and a locking pin movably disposed in said slide channel and operable to extend into the selected one of said locking grooves so as to arrest rotation of said seat member relative to said seat post.