Articulated nozzle closure for fluid dispensers

A closure system for a fluid outlet, the system comprising:

• a motor connected to a proximal end of a lead screw also having a distal end with a threaded portion disposed therebetween, the distal end of the lead screw connected a radially outwardly extending finger,
• the lead screw passing through a threaded hole of a hub having a first end and a second end, the threaded hole extending from the first end that faces the motor to a recess within the hub, the distal end of the lead screw and the finger being disposed within the recess, the hub further comprising an abutment disposed within the recess,
• the second end of the hub connected to a proximal end of an arm extending radially outwardly from the hub, a distal end the arm being connected to a closure for covering the fluid outlet,
• the hub comprising a curved slot coaxial with the threaded hole and spaced radially outwardly therefrom, the curved slot terminating at two circumferentially spaced apart ends,
• the curved slot accommodating a stationary pin that permits a partial rotation of the hub about an axis defined by the threaded hole,
• the distal end of the lead screw engaging a spring that engages the stationary pin and the hub and which biases the hub towards a position where the stationary pin engages one of the ends of the curved slot with the closure covering the fluid outlet,
• the motor rotating the lead screw resulting in axial movement of the hub, arm and closure away from the motor and fluid outlet respectively and rotation of the lead screw further rotating the finger within a recess and towards the abutment and, when the finger engages the abutment, continued rotation of the lead screw overcomes the bias of the spring resulting in partial rotation of the hub, arm and closure to a position where the stationary pin engages the other of the ends of the curved slot with the closure being rotated away from the fluid outlet.