초록 ▼

An improved nozzle assembly for manually actuated foam generating and dispensing units in which a tapered bottle cap fitted at its interior end with a dip tube subassembly, is provided with a movable porous element which, upon discharge of foam from the dip tube subassembly, effects a further reduct

An improved nozzle assembly for manually actuated foam generating and dispensing units in which a tapered bottle cap fitted at its interior end with a dip tube subassembly, is provided with a movable porous element which, upon discharge of foam from the dip tube subassembly, effects a further reduction in bubble size in the foam thereby to provide a stiffer and more consistent foam. The movable porous element floats in the nozzle between a position of seating against the tapered internal nozzle surfaces and a retracted position allowing air to return about the member back to the interior of the generating and dispensing unit.

대표청구항 ▼

In a low pressure foam generating and dispensing device having a receptacle for containing foamable liquid and air, a nozzle near one vertical extremity of the receptacle and having internal surfaces to define a discharge passageway open at one end to the receptacle interior and to a foam dischargin

In a low pressure foam generating and dispensing device having a receptacle for containing foamable liquid and air, a nozzle near one vertical extremity of the receptacle and having internal surfaces to define a discharge passageway open at one end to the receptacle interior and to a foam discharging opening at its other end, at least a portion of the discharge passageway being defined by an outwardly converging frusto-conical interior surface, a mixing subassembly connected to the one end of the discharge passageway and having an imperforate tube extending to and opening near the other vertical extremity of the receptacle, and a one-way air return passage operative to pass air into the receptacle upon a reduction of pressure within the receptacle to below atmospheric pressure, the improvement comprising: a movable form sustaining porous element positioned in the discharge passageway between the mixing subassembly a frusto-conical portion of the discharge passageway, said movable porous element being larger than the small end of the frusto-conical portion and smaller than the transverse area of the discharge passageway at the mixing subassembly, whereby said movable porous element moves against the internal frusto-conical surfaces of the nozzle upon discharge of a foamable liquid and air mixture from the receptacle to cause passage of the discharged mixture through the movable porous element and whereby the movable porous element moves toward the mixing subassembly to allow air to return to the interior of the receptacle around said movable porous element and through the air return passage.