Automatically Closing Dispenser Head

Abstract

A dispenser head for a pressurized container has a channel for the medium to be dispensed that is connected to a dispensing opening and communicates with the container interior. A closure piston is arranged in the channel and closes off the dispensing opening. By applying pressure onto an actuating element, the valve of the pressurized container is actuated and the closure piston is moved into an opening position to release the dispensing opening. The closure piston has spaced-apart centering projections and flow passages therebetween for the medium. An end face of the closure piston remote from the dispensing opening has an elastic spring area with a head section interacting with the actuating element. The actuating element glides along the rounded head section when the closure piston moves into the opening and closing positions. The rounded head section is matched to the movement path of the actuating element.

1 . An automatically closing dispenser head for a pressurized container with a dispensing valve for dispensing a medium, the dispenser head comprising:
 a dispensing opening;   an opening mechanism by means of which, in the mounted state on the pressurized container, the dispensing valve of the pressurized container can be opened;   a channel for the medium to be dispensed, wherein the channel is connected to the dispensing opening and communicated with an interior of the pressurized container, wherein the channel has at least a first channel section and a second channel section;   a closure piston arranged in the second channel section;   an actuating element, wherein, by applying pressure onto the actuating element, the opening mechanism is actuated and the closure piston and the second channel section are moved relative to one another such that the closure piston is movable from a closing position, in which the closure piston closes off the dispensing opening, out of the dispensing opening into an opening position, in which the closure piston is moved out of the dispensing opening and releases the dispensing opening;   wherein the closure piston has an outer piston wall provided with centering projections;   wherein the centering projections are positioned at a distance from one another and movable together with the closure piston;   wherein between the centering projections flow passages for the medium are provided;   wherein at an end face of the closure piston facing away from the dispensing opening an elastic spring area is provided that is delimited remote from the dispensing opening by a head section interacting with the actuating element;   wherein the head section has a rounded cross-sectional configuration and the actuating element glides along the head section during movement of the closure piston into the opening and closing positions;   wherein the rounded cross-sectional configuration of the head section is matched to the movement path of the actuating element.   
   
   
       2 . The automatically closing dispenser head according to  claim 1 , wherein the centering projections are uniformly distributed about a circumference of the closure piston. 
   
   
       3 . The automatically closing dispenser head according to  claim 1 , wherein a longitudinal center axis of the closure piston is oriented such that an angle of less than 15 degrees to the horizontal is provided. 
   
   
       4 . The automatically closing dispenser head according to  claim 1 , wherein the closure piston has a piston head provided with an injection-molded seal of a soft plastic material and wherein the second channel section has a valve seat into which, for assuming the closing position of the closure piston, the seal of the closure piston is inserted completely or a partial spacing at least to a front end of the dispensing opening. 
   
   
       5 . The automatically closing dispenser head according to  claim 4 , wherein the closure piston has an inner central conduit and, in the area of the seal, branching transverse conduits communicating with the inner central conduit and opening into the outer wall of the closure piston, wherein the central and transverse conduits are used for injection-molding the seal.