Patent ID: 7213890

Claim:
A zero-radius-turning lawn mower, comprising: a drive axle coupled to a wheel motor of the lawn mower, the drive axle comprising at least one axle surface; a wheel comprising a hub, wherein the hub defines a central opening to receive an end of the drive axle, the central opening defined by a drive axle receiving surface corresponding to the at least one axle surface such that little or no relative rotation occurs between the hub and the drive axle when the drive axle is received within the central opening, and further wherein the hub comprises an anchor portion offset from the central opening; a hub fastener to axially secure the hub to the drive axle; and an anti-rotate apparatus comprising: an anti-rotate member interlockably engagable with a head of the hub fastener; and a retaining fastener threadably engagable with the anchor portion to secure the anti-rotate member relative to the hub.