Patent ID: 8448653
Filing Date: 2013-05-28
Classification: B60S

Abstract:
1. A car wash system for installation in an area where vehicles are to be washed comprising; an overhead support; at least one spray arm having a fluid delivery system and being dependingly mounted to said overhead support in a normal vertical operating orientation where fluids can be delivered from the arm to a vehicle; a drive for moving the arm; and a breakaway knuckle associated with said spray arm to allow at least a portion thereof to be displaced angularly away from a normal vertical operating orientation about an axis, said knuckle comprising a follower surface and a spring-loaded ball normally residing in a detent in a position in said surface corresponding to the normal operating orientation, said surface being a surface for the detent ball to follow when the joint breaks away and moves said arm moves about said axis; said knuckle being free of reset springs operating in opposition to movement of said arm about said axis after the knuckle breaks away, whereby breakaway movement from the normal operating orientation while the detent ball is on said surface but not in said detent is resisted essentially only by gravity acting on said arm.