Spray head

Claim 2

A spray head comprising a body having an air-inlet passageway terminating in said body, a liquid-inlet passageway also terminating in said body adjacent to the terminal of said airinlet passageway, means forming a seat at the terminal of said liquid-inlet passageway, a resilient imperforate diaphragm disposed across said seat and the terminal of said air-inlet passageway, a spring-biased member imposing pressure on said diaphragm to maintain said diaphragm sealed against said seat in the absence of sufficient air pressure in the air-inlet passageway to raise the diaphragm from said seat, said liquid inlet passageway being free of said spring-biased member, a mixing cavity defined in part by said diaphragm and exposed to both of said passageway terminals upon sufficient air pressure being in said air-inlet passageway to raise said diaphragm from said seat, said diaphragm being secured around its entire periphery to constitute a membrane-like barrier Preventing flow of liquid and air therepast from said mixing cavity, an outlet passageway downstream of said mixing cavity for conveying an airliquid mixture from said mixing cavity, and a nozzle in communication with said outlet passageway for spraying the mixture conveyed thereto.

Claim 3

A spray head comprising a body having an air-inlet passageway terminating in said body, a liquid-inlet passageway also terminating in said body adjacent to the terminal of said air-inlet passageway, means forming a seat at the terminal of said liquid-inlet passageway, a resilient diaphragm disposed across said seat and the terminal of said air-inlet passageway, a spring-biased member imposing pressure on said diaphragm to maintain said diaphragm sealed against said seat in the absence of sufficient air pressure in the air-inlet passageway to raise the diaphragm from said seat, a mixing cavity defined in part by said diaphragm and exposed to both of said passageway terminals upon sufficient air pressure being in said air-inlet passageway to raise said diaphragm from said seat, an outlet passageway downstream of said mixing cavity for conveying an air-liquid mixture from said mixing cavity, and a nozzle in communication with said outlet passageway for spraying the mixture conveyed thereto; and in which said diaphragm is imperforate, said spring-biased member is a spring biased-piston, and said diaphragm is peripherally clamped to said body against a diaphragm seat therein.

Claim 4

A spray head comprising a body having an air-inlet passageway terminating in said body, a liquid-inlet passageway also terminating in said body adjacent to the terminal of said air-inlet passageway, means forming a seat at the terminal of said liquid-inlet passageway, a resilient diaphragm disposed across said seat and the terminal of said air-inlet passageway, a spring-biased member imposing pressure on said diaphragm to maintain said diaphragm sealed against said seat in the absence of sufficient air pressure in the air-inlet passageway to raise the diaphragm from said seat, a mixing cavity defined in part by said diaphragm and exposed to both of said passageway terminals upon sufficient air pressure being in said air-inlet passageway to raise said diaphragm from said seat, an outlet passageway downstream of said mixing cavity for conveying an air-liquid mixture from said mixing cavity, and a nozzle in communication with said outlet passageway for spraying the mixture conveyed thereto; and in which said diaphragm is imperforate, said spring-biased member is a spring biased-piston, and said diaphragm is peripherally clamped to said body against a diaphragm seat therein.

Claim 5

A spray head according to claim 1 in which the terminal of the liquid-inlet passageway is small in cross-sectional area as compared to the cross-sectional area of the face of the diaphragm that is presented thereto.

Claim 6

A spray head according to claim 1 in which said nozzle comprises swivelly mounted ball member having an opening therethrough, one end portion of the opening being conical, and an opposite end portion being of different shape whereby the ball member may be optionally rotated to provide different spray patterns.

Claim 7

A spray head according to claim 1 in which said nozzle comprises a tube member.

Claim 8

A spray head comprising a body having an air-inlet passageway terminating in said body, a liquid-inlet passageway also terminating in said body adjacent to the terminal of said air-inlet passageway, means forming a seat at the terminal of said liquid-inlet passageway, a resilient diaphragm disposed across said seat and the terminal of said air-inlet passageway, a spring-biased member imposing pressure on said diaphragm to maintain said diaphragm sealed against said seat in the absence of sufficient air pressure in the air-inlet passageway to raise the diaphragm from said seat, a mixing cavity defined in part by said diaphragm and exposed to both of said passageway terminals upon sufficient air pressure being in said air-inlet passageway to raise said diaphragm from said seat, an outlet passageway downstream of said mixing cavity for conveying an air-liquid mixture from said mixing cavity, and a nozzle in communication with said outlet passageway for spraying the mixture conveyed thereto; and in which said body has a shoulder surrounding said passageway terminals, said diaphragm is peripherally supported on said shoulder, a tubular flange is on said body and surrounds said shoulder, a clamping ring is threaded into said flange and peripherally clinches said diaphragm against said shoulder, said spring-biased member is a piston in said clamping ring that is biased by a spring, and a cap is threaded onto said flange and provides an abutment for one end of the spring, the threaded position of said cap on said tubular flange determining the amount of axial movement permitted by said piston.

Claim 9

A spray head comprising a body having an air-inlet passageway terminating in said body, a liquid-inlet passageway also terminating in said body adjacent to the terminal of said air-inlet passageway, means forming a seat at the terminal of said liquid-inlet passageway, a resilient diaphragm disposed across said seat and the terminal of said air-inlet passageway, a spring-biased member imposing pressure on said diaphragm to maintain said diaphragm sealed against said seat in the absence of sufficient air pressure in the air-inlet passageway to raise the diaphragm from said seat, a mixing cavity defined in part by said diaphragm and exposed to both of said passageway terminals upon sufficient air pressure being in said air-inlet passageway to raise said diaphragm from said seat, an outlet passageway downstream of said mixing cavity for conveying an air-liquid mixture from said mixing cavity, and a nozzle in communication with said outlet passageway for spraying the mixture conveyed thereto; and in which said body has a shoulder surrounding said passageway terminals, said diaphragm is peripherally supported on said shoulder, a tubular flange is on said body and surrounds said shoulder, a clamping ring is threaded into said flange and peripherally clinches said diaphragm against said shoulder, said spring-biased member is a piston in said clamping ring that is biased by a spring, and a cap is threaded onto said flange and provides an abutment for one end of the spring, the threaded position of said cap on said tubular flange determining the amount of axial movement permitted by said piston.

Claim 10

A spray head according to claim 6 in which said mixing cavity is of a shape to provide a sheet-like flow of liquid therethrough.

Claim 11

A spray head comprising a body having an air-inlet passageway terminating in said body, a liquid-inlet passageway also terminating in said body adjacent to the terminal of saiD air-inlet passageway, means forming a seat at the terminal of said liquid-inlet passageway, a resilient diaphragm disposed across said seat and the terminal of said air-inlet passageway, a spring-biased member imposing pressure on said diaphragm to maintain said diaphragm sealed against said seat in the absence of sufficient air pressure in the air-inlet passageway to raise the diaphragm from said seat, a diaphragm seat in said body and supporting the periphery of said diaphragm, a clamping ring removably secured to said body and imposing pressure against said diaphragm to seal the diaphragm in place on said seat, a mixing cavity defined in part by said diaphragm and exposed to both of said passageway terminals upon sufficient air pressure being in said air-inlet passageway to raise said diaphragm from said seat, an outlet passageway downstream of said mixing cavity for conveying an air-liquid mixture from said mixing cavity, and a nozzle in communication with said outlet passageway for spraying the mixture conveyed thereto.

Claim 12

A spray head comprising a body having an air-inlet passageway terminating in said body, a liquid-inlet passageway also terminating in said body adjacent to the terminal of saiD air-inlet passageway, means forming a seat at the terminal of said liquid-inlet passageway, a resilient diaphragm disposed across said seat and the terminal of said air-inlet passageway, a spring-biased member imposing pressure on said diaphragm to maintain said diaphragm sealed against said seat in the absence of sufficient air pressure in the air-inlet passageway to raise the diaphragm from said seat, a diaphragm seat in said body and supporting the periphery of said diaphragm, a clamping ring removably secured to said body and imposing pressure against said diaphragm to seal the diaphragm in place on said seat, a mixing cavity defined in part by said diaphragm and exposed to both of said passageway terminals upon sufficient air pressure being in said air-inlet passageway to raise said diaphragm from said seat, an outlet passageway downstream of said mixing cavity for conveying an air-liquid mixture from said mixing cavity, and a nozzle in communication with said outlet passageway for spraying the mixture conveyed thereto.

Claim 13

A spray head according to claim 8 in which said spring-biased means is within said clamping ring.

Claim 14

A spray head comprising a body having an air-inlet passageway terminating in said body, a liquid-inlet passageway also terminating in said body adjacent to the terminal of said air-inlet passageway, means forming a seat at the terminal of said liquid-inlet passageway, a resilient diaphragm disposed across said seat and the terminal of said air-inlet passageway, a spring-biased member imposing pressure on said diaphragm to maintain said diaphragm sealed against said seat in the absence of sufficient air pressure in the air-inlet passageway to raise the diaphragm from said seat, a mixing cavity defined in part by said diaphragm and exposed to both of said passageway terminals upon sufficient air pressure being in said air-inlet passageway to raise said diaphragm from said seat, said diaphragm being an imperforate member-like member having opposed sides of such configuration as to be operable when either side is exposed to the air-liquid mixture, means removably mounting said diaphragm in said body so that upon removal of said means the diaphragm may be selectively installed within said body with either side thereof presented to said mixture, an outlet passageway downstream of said mixing cavity for conveying an air-liquid mixture from said mixing cavity, and a nozzle in communication with said outlet passageway for spraying the mixture conveyed thereto.

Claim 15

A spray head comprising a body having an air-inlet passageway terminating in said body, a liquid-inlet passageway also terminating in said body adjacent to the terminal of said air-inlet passageway, means forming a seat at the terminal of said liquid-inlet passageway, a resilient diaphragm disposed across said seat and the terminal of said air-inlet passageway, a spring-biased member imposing pressure on said diaphragm to maintain said diaphragm sealed against said seat in the absence of sufficient air pressure in the air-inlet passageway to raise the diaphragm from said seat, a mixing cavity defined in part by said diaphragm and exposed to both of said passageway terminals upon sufficient air pressure being in said air-inlet passageway to raise said diaphragm from said seat, said diaphragm being an imperforate member-like member having opposed sides of such configuration as to be operable when either side is exposed to the air-liquid mixture, means removably mounting said diaphragm in said body so that upon removal of said means the diaphragm may be selectively installed within said body with either side thereof presented to said mixture, an outlet passageway downstream of said mixing cavity for conveying an air-liquid mixture from said mixing cavity, and a nozzle in communication with said outlet passageway for spraying the mixture conveyed thereto.