Patent ID: 7971594

Claim:
A device for spray-washing the wheels of a vehicle moving along a wash lane comprising: an elongate arm having at least one laterally directed spray head mounted thereon proximate one end thereof; a pivotal mount defining a pivot axis proximate the other end of the arm to suspend the arm for pendulum movement between a rest position, an armed position in which the arm is angled in a first vehicle-approaching direction, and a third position in which the arm is angled in a vehicle-departing direction wherein the rest position is between the first and third position, said pendulum movement being such as to allow angular displacement of said head substantially parallel to said lane thereto to follow a wheel of a vehicle moving in said lane, and wherein the arm is substantially vertical in the rest position; an actuator for angularly displacing the arm about the pivot axis from the rest position to the armed position and to the third position; and a switch connected to release the arm from the armed position for unpowered movement toward the rest position.