US 4,730,775 A · Two piece foamer nozzle assembly

Abstract

The two piece foamer nozzle assembly comprises a first piece including a body having a front end and a rear end and a second piece releasably connected to the first piece. The first piece has a first cavity in the body thereof opening onto the rear end thereof and being adapted to be received over a nozzle bushing mounted at the front end of the body of a hand manipulatable pumping apparatus. The nozzle bushing is of the type which will eject fluid into the first cavity in a swirl or spiral manner. The first piece further comprises a barrel portion having a second cavity opening onto the front end thereof and an intermediate wall within the first piece between the first and second cavities. The intermediate wall has an orifice extending therethrough with a rear end communicating thereof with the first cavity and a front end communicating with the second cavity. The swirl of liquid is ejected in a spray pattern from the front end of the orifice. The second piece has a rearwardly extending formation sized to be releasably received and fixed within the second cavity of the first piece. The formation has a foam generating chamber therein which opens onto the rear end of the second piece in front of the front end of the orifice and which has an irregular surface therein. The second piece also has a front end with a nozzle opening therein and the foam generating chamber is in communication with the nozzle opening whereby liquid sprayed in a generally conical pattern into the foam generating chamber and impinging upon the irregular surface mixes with air and created foam which is ejected through the nozzle opening.

Claims25

Dependent claims

A foamer nozzle assembly adapted to be mounted to a body of a hand manipulated pumping apparatus including a pumping mechanism and a nozzle bushing mounted at the front end of the body, the nozzle bushing being of the type which will eject fluid in a swirling spray, said foamer assembly comprising:

a first piece including a body having a front end from which fluid is discharged and a rear end, a first cavity in the body opening onto the rear end and being adapted to be received over the nozzle bushing mounted at the front end of the body of the hand manipulatable pumping apparatus, said first cavity receiving the swirling spray ejected from the nozzle, said first piece further comprising a barrel portion having a second cavity opening onto said front end thereof and an intermediate wall within said first piece between said first and second cavities, said intermediate wall having an orifice therethrough with a rear end thereof communicating with said first cavity and a front end communicating with said second cavity, liquid being ejected in a spray pattern from said front end of said orifice, a second piece connected to said first piece in a manner forming a foaming apparatus and having a rearwardly extending formation sized to be received and fixed within said second cavity of said first piece, said formation having a foam generating chamber therein opening onto the rear end of said second piece in front of said front end of said orifice, said foam generating chamber having side walls with an internal irregular surface therein, said second piece having a front end with a nozzle opening therein and said foam generating chamber being in communication with said nozzle opening whereby liquid sprayed in a generally conical pattern into said foam generating chamber and impinging upon said irregular surface mixes with air and creates foam which is ejected through said nozzle opening, said rearwardly extending formation of said second piece having a portion cut away and extending toward the front end of said second piece so as to form passage means into said second cavity and into an entrance area between the front end of said orifice and said foam generating chamber, said passage means in an operative position of said nozzle assembly being positioned to face downwardly so that foam that may drip around said nozzle opening will be sucked back into said passage means to said entrance area and then into said foam generating chamber on repeated strokes of the pumping mechanism of the pumping apparatus.

In a nozzle assembly for generating foam of the type in which liquid is emitted from an orifice in the assembly in a generally spray or conical pattern into the entrance end of a foam generating chamber of the assembly and in which a front nozzle has an opening from which a foam is discharged and which is in communication with the chamber such that foam is ejected forwardly from the front nozzle opening, the improvement comprising air passage means for supplying air to the entrance end of the foam generating chamber and an air passageway communicating with said air passage means at one end and opening at the other end adjacent the front nozzle, said other end of said air passageway being located so that suction of air into said air passageway also reduces dripping of foam that may tend to drip from the front nozzle opening of the assembly by sucking such foam into said air passageway back to said air passage means at the entrance end of the foam generating chamber and into the foam generating chamber as liquid is sprayed into the foam generating chamber.

A two piece foamer nozzle assembly, adapted to be mounted on a hand manipulatable pumping apparatus body which includes a pumping mechanism and a nozzle bushing mounted at a front end of the body of said apparatus, the nozzle bushing being of the type which will eject fluid in a swirling spray, said two piece foamer nozzle assembly comprising:

a first piece including a body having a front end from which fluid is discharged and a rear end, a first cavity in the body opening onto the rear end and being adapted to be received over the nozzle bushing mounted at the front end of the body of the hand manipulatable pumping apparatus, said first cavity receiving the ejected swirling spray, said first piece further comprising a barrel portion having a second cavity opening onto said front end thereof and an intermediate wall within said first piece between said first and second cavities, said intermediate wall having an orifice therethrough with a rear end thereof communicating with said first cavity and a front end communicating with said second cavity, liquid being ejected in a conical spray pattern from said front end of said orifice, a second piece releasably connected to said first piece in a manner forming a foaming apparatus, said second piece including a tab depending therefrom and two spaced apart fingers extending axially rearwardly from said tab and integrally fixed to said tab, said first piece having an axially extending rib on one side thereof which is integral with said first piece and which is adapted to receive said fingers on either side thereof, said fingers and said rib having mating ribs and grooves, so as to form a tongue-and-groove fit between said fingers and said rib, said first piece including a ledge that is fixed to and extends under at least a portion of said rib whereby said second piece can be detached from the foam connection thereof to said first piece, rotated 180.degree., and then connected by means of said fingers being received over said rib and above said ledge to said first piece whereby liquid can be emitted through said orifice in said barrel portion and out of said barrel portion in a conical spray pattern, said second piece having a rearwardly extending formation sized to be releasably received and fixed within said second cavity of said first piece, said formation having a foam generating chamber therein opening onto the rear end of said second piece in front of said front end of said orifice, said foam generating chamber having side walls with an irregular surface therein, said second piece having a front end with a nozzle opening therein and said foam generating chamber being in communication with said nozzle opening whereby liquid sprayed in a generally conical pattern into said foam generating chamber and impinging upon said irregular surface mixed with air and creates foam which is ejected through said nozzle opening.

Dependencies are inferred from the claim text.

Two piece foamer nozzle assembly

Life of this patent

Two piece foamer nozzle assembly

Life of this patent

Abstract

Claims25