초록

An aspirator configured to be received within a shower fitting for generating a negative pressure in response to water flow.

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1. A shower fitting comprising: a housing including an inlet, a first outlet, a second outlet, and an inner surface defining a bore in fluid communication with the inlet, the first outlet and the second outlet;an aspirator including a body received within the bore, the body including a first end, a

1. A shower fitting comprising: a housing including an inlet, a first outlet, a second outlet, and an inner surface defining a bore in fluid communication with the inlet, the first outlet and the second outlet;an aspirator including a body received within the bore, the body including a first end, a second end, and a sidewall defining an inner passageway extending along a longitudinal axis between the first end and the second end, the sidewall including a plurality of longitudinally extending flutes having a plurality of concave recesses extending between the sidewall of the aspirator and the inner surface of the bore, the flutes extending from proximate the first end of the body in fluid communication with the inlet of the housing to proximate the second end of the body in fluid communication with the second outlet of the housing; andan outer passageway extending between the plurality of recesses of the aspirator and the inner surface of the bore, the outer passageway including a first end sealed from the first outlet, and a second end in open communication with the second outlet such that a negative pressure is exerted on the inner passageway by fluid flow through the outer passageway to the second outlet. 2. The shower fitting of claim 1, wherein the outer passageway includes a first cross-sectional flow area proximate the first end and a second cross-sectional flow area proximate the second end, the first cross-sectional flow area being greater than the second cross-sectional flow area. 3. The shower fitting of claim 2, wherein the flutes taper inwardly toward the longitudinal axis as the flutes extend from the second end toward the first end. 4. The shower fitting of claim 1, further comprising a connecting port in fluid communication with the inlet and the bore, the connecting port extending radially relative to the bore and positioned adjacent the first end. 5. The shower fitting of claim 1, wherein a plurality of lands separate the plurality of recesses of the flutes, at least a portion of each flute configured to provide an interference fit with the inner surface of the bore. 6. The shower fitting of claim 5, wherein the first end of the body includes an end wall sealingly engaging the inner surface of the bore for sealing the outer passageway from the first outlet. 7. The shower fitting of claim 1, wherein the recesses of the flutes provide at least 0.080 inch clearance with the inner surface of the bore to permit passage of debris. 8. A shower fitting comprising: a housing configured to receive a flow control valve, the housing including an inner surface defining a bore;an inlet, a first outlet, and a second outlet fluidly coupled to the first outlet by the bore;an aspirator including a body received within the bore, the body including a first end, a second end, and a sidewall defining an inner passageway extending along a longitudinal axis between the first end and the second end, the sidewall including a plurality of longitudinally extending flutes having a plurality of recesses, and a plurality of lands separating the plurality of recesses, wherein the flutes taper inwardly toward the longitudinal axis as the flutes extend in a longitudinal direction from the second end toward the first end, at least a portion of each flute configured to provide an interference fit with the inner surface of the bore; andan outer passageway extending between the plurality of recesses of the aspirator and the inner surface of the bore, wherein the first end of the body includes an end wall sealingly engaging the inner surface of the bore for sealing the outer passageway from the first outlet. 9. The shower fitting of claim 8, wherein the outer passageway includes a first end sealed from the first outlet, a second end in open communication with the second outlet such that a negative pressure is exerted on the inner passageway by fluid flow through the outer passageway to the second outlet. 10. The shower fitting of claim 9, wherein the outer passageway includes a first cross-sectional flow area proximate the first end and a second cross-sectional flow area proximate the second end, the first cross-sectional flow area being greater than the second cross-sectional flow area. 11. The shower fitting of claim 8, further comprising a connecting port in fluid communication with the inlet and the bore, the connecting port extending radially relative to the bore and positioned adjacent the first end. 12. The shower fitting of claim 8, wherein the recesses of the flutes provide at least 0.080 inch clearance with the inner surface of the bore to permit passage of debris. 13. An aspirator for being positioned in a shower fitting having a vertical bore with a lower outlet and an upper outlet, the aspirator comprising: a lower end;an upper end spaced above the lower end and sealingly engaging an inner surface of the vertical bore between the lower outlet and the upper outlet;a sidewall defining an inner passageway extending between the lower end and the upper end; anda plurality of longitudinally extending flutes supported by the sidewall and extending from the lower end toward the upper end, the flutes including a plurality of concave recesses within the vertical bore of the shower fitting, and a plurality of lands separating the plurality of recesses, the recesses in open communication with the lower outlet, wherein the flutes taper inwardly as the flutes extend from the lower end toward the upper end. 14. The aspirator of claim 13, wherein at least a portion of each flute is configured to provide an interference fit with the inner surface of the vertical bore. 15. The aspirator of claim 13, wherein an outer passageway is defined by the plurality of recesses intermediate the sidewall and the inner surface of the vertical bore, the outer passageway including an upper end sealed from the upper outlet, a lower end in open communication with the lower outlet such that a negative pressure is exerted on the inner passageway by fluid flow through the outer passageway to the lower outlet. 16. The aspirator of claim 15, wherein the outer passageway includes a first cross-sectional flow area proximate the upper end and a second cross-sectional flow area proximate the lower end, the first cross-sectional flow area being greater than the second cross-sectional flow area.