QUAD-MODE FAUCET

1 . A system comprising:

a housing comprising a fluid inlet fluidly coupled to a fluid supply;

a cavity fluidly coupled to and downstream of the fluid inlet;

a momentary shutoff valve:

fluidly coupled to and interposed between the fluid inlet and the cavity; and

configured to:

pass fluid from the fluid inlet into the cavity in an open mode; and

block passage of fluid from the fluid inlet into the cavity in a closed mode;

a first spring configured to bias the momentary shutoff valve in the open mode;

a momentary button:

arranged on the housing; and

configured to transition the momentary shutoff valve between the open mode and the closed mode;

an aerator nozzle arranged on a distal end of the housing;

a soft-flow nozzle arranged on the distal end of the housing adjacent the aerator nozzle;

a flat-fan nozzle arranged on the distal end of the housing adjacent the soft-flow nozzle and the aerator nozzle;

a primary flow selector valve:

fluidly coupled to and downstream of the cavity; and

comprising:

a primary valve seat; and

a primary piston:

unseated from the primary valve seat in an aerated mode to:

 pass fluid from the cavity to the aerator nozzle; and

 block passage of fluid from the cavity to a secondary flow selector valve; and

seated on the primary valve seat in an intermediate mode to:

 pass fluid from the cavity to the secondary flow selector valve; and

 block passage of fluid from the cavity to the aerator nozzle;

a second spring configured to bias the primary piston in the aerated mode;

the secondary flow selector valve:

fluidly coupled to and downstream of the primary flow selector valve; and

comprising:

a secondary valve seat; and

a secondary piston:

unseated from the secondary valve seat in a soft-flow mode to:

 pass fluid from the primary flow selector valve, in the intermediate mode, to the soft-flow nozzle; and

 block passage of fluid from the primary flow selector valve, in the intermediate mode, to the flat-fan nozzle; and

seated on the secondary valve seat in a flat-fan mode to:

 pass fluid from the primary flow selector valve, in the intermediate mode, to the flat-fan nozzle; and

 block passage of fluid from the primary flow selector valve, in the intermediate mode, to the soft-flow nozzle;

a third spring configured to bias the secondary flow selector valve in the soft-flow mode;

a shaft:

coupled to the secondary piston;

operable in:

a first position locating the secondary piston in the flat-fan mode; and

a second position locating the secondary piston in the soft-flow mode; and

comprising a distal end configured to drive the primary piston from the aerated mode into the intermediate mode during transition of the shaft from the first position into the second position; and

a flow selector button:

arranged on the housing;

coupled to the shaft; and

configured to transition the shaft between the first position and the second position.

2 . The system of claim 1 , wherein, when the primary piston occupies the intermediate mode:

fluid flowing around the primary piston compresses the primary piston against the second spring to seat the primary piston on the primary valve seat and to maintain the primary piston in the intermediate mode.

3 . The system of claim 2 :

wherein, when the secondary piston occupies the soft-flow mode:

fluid flowing past a first face of the secondary piston unseats the secondary piston from the secondary valve seat to maintain the secondary piston in the soft-flow mode; and

wherein, when the secondary piston occupies the flat-fan mode:

fluid flowing past a second face, opposite the first face, of the secondary piston seats the secondary piston on the secondary valve seat to maintain the secondary piston in the flat-fan mode.

4 . The system of claim 1 :

wherein, when the flow selector button is depressed while the primary piston occupies the aerated mode:

the flow selector button:

drives the distal end of the shaft into the primary piston to transition the primary piston from the aerated mode into the intermediate mode; and

transitions the secondary piston into the soft-flow mode; and

fluid flowing around the primary piston compresses the primary piston against the second spring to maintain the primary piston in the intermediate mode; and

wherein, when the momentary button is depressed while the primary piston occupies the intermediate mode and the secondary piston occupies the soft-flow mode:

a fluid supply valve, arranged upstream of the fluid inlet, interrupts fluid flowing around the primary piston; and

the second spring drives the primary piston into the aerated mode.

5 . The system of claim 1 :

wherein the flow selector button comprises a rocker switch;

wherein, when the rocker switch is depressed in a first direction while the primary piston occupies the aerated mode:

the rocker switch:

drives the distal end of the shaft into the primary piston to transition the primary piston from the aerated mode into the intermediate mode; and

transitions the secondary piston into the soft-flow mode; and

fluid flowing around the primary piston compresses the primary piston against the second spring to maintain the primary piston in the intermediate mode; and

when the rocker switch is depressed in a second direction while the primary piston occupies the intermediate mode and the secondary piston occupies the soft-flow mode:

the rocker switch:

retracts the secondary piston to transition the secondary piston from the soft-flow mode into the flat-fan mode.

6 . The system of claim 5 :

wherein, when the rocker switch is depressed in the first direction while the primary piston occupies the intermediate mode and the secondary piston occupies the flat-fan mode:

the rocker switch transitions the secondary piston into the soft-flow mode.

7 . The system of claim 5 :

wherein, when the momentary button is depressed while the primary piston occupies the intermediate mode and the secondary piston occupies the flat-fan mode:

a fluid supply valve, arranged upstream of the fluid inlet, interrupts fluid flowing around the primary piston; and

the second spring drives the primary piston into the aerated mode.

8 . The system of claim 5 :

further comprising a fluid supply valve:

arranged upstream of the fluid inlet; and

configured to interrupt passage of fluid from the fluid supply to the fluid inlet in a closed position; and

wherein, when the fluid supply valve occupies the closed position:

a fluid supply valve, arranged upstream of the fluid inlet, interrupts fluid flowing around the primary piston; and

the second spring drives the primary piston into the aerated mode.

9 . The system of claim 1 , further comprising a first flow restrictor:

interposed between the fluid inlet and the aerator nozzle; and

configured to cooperate with the aerator nozzle to discharge water droplets from the aerator nozzle at a first flow rate.

10 . The system of claim 1 , further comprising:

a first flow restrictor:

interposed between the primary flow selector valve and the aerator nozzle; and

that cooperates with the aerator nozzle to discharge water droplets from the aerator nozzle at a first flow rate;

a second flow restrictor:

arranged upstream of the soft-flow nozzle; and

that cooperates with the soft-flow nozzle to discharge water droplets from the soft-flow nozzle at a second flow rate; and

a third flow restrictor:

interposed between the secondary flow selector valve and the flat-fan nozzle; and

that cooperates with the flat-fan nozzle to discharge water droplets from the flat-fan nozzle at a third flow rate.

11 . The system of claim 1 :

wherein the aerator nozzle comprises:

a circular aperture configured to discharge water droplets exhibiting an aerated spray pattern; and

an aerator arranged over the circular aperture and configured to mix air with water exiting the aerator nozzle;

wherein the soft-flow nozzle comprises a set of apertures configured to discharge water droplets in a hollow-cylinder spray pattern; and

wherein the flat-fan nozzle comprises a rectilinear aperture configured to discharge water droplets in a flat-fan spray pattern.

12 . The system of claim 1 :

wherein the housing comprises a spray head comprising a spray head face;

wherein the soft-flow nozzle is arranged radially about a perimeter of the spray head face;

wherein the aerator nozzle is arranged on the spray head face inset from the soft-flow nozzle; and

wherein the flat-fan nozzle is arranged on the spray head face inset from the soft-flow nozzle adjacent the aerator nozzle.

13 . A system comprising:

a housing comprising a fluid inlet fluidly coupled to a fluid supply;

a cavity fluidly coupled to and downstream of the fluid inlet;

a momentary shutoff valve:

fluidly coupled to and interposed between the fluid inlet and the cavity; and

configured to:

pass fluid from the fluid inlet into the cavity in an open mode; and

block passage of fluid from the fluid inlet into the cavity in a closed mode;

a momentary button:

arranged on the housing; and

configured to transition the momentary shutoff valve between the open mode and the closed mode;

a first nozzle arranged on a distal end of the housing;

a second nozzle arranged on the distal end of the housing adjacent the first nozzle;

a third nozzle arranged on the distal end of the housing adjacent the second nozzle and the first nozzle;

a primary flow selector valve:

fluidly coupled to and downstream of the cavity; and

comprising:

a primary valve seat; and

a primary piston:

unseated from the primary valve seat in a first mode to:

 pass fluid from the cavity to the first nozzle; and

 block passage of fluid from the cavity to a secondary flow selector valve; and

seated on the primary valve seat in an intermediate mode to:

 pass fluid from the cavity to the secondary flow selector valve; and

 block passage of fluid from the cavity to the first nozzle;

the secondary flow selector valve:

fluidly coupled to and downstream of the primary flow selector valve; and

comprising:

a secondary valve seat; and

a secondary piston:

unseated from the secondary valve seat in a second mode to:

 pass fluid from the primary flow selector valve, in the intermediate mode, to the second nozzle; and

 block passage of fluid from the primary flow selector valve, in the intermediate mode, to the third nozzle; and

seated on the secondary valve seat in a third mode to:

 pass fluid from the primary flow selector valve, in the intermediate mode, to the third nozzle; and

 block passage of fluid from the primary flow selector valve, in the intermediate mode, to the second nozzle;

a shaft:

coupled to the secondary piston;

operable in:

a first position locating the secondary piston in the third mode; and

a second position locating the secondary piston in the second mode; and

comprising a distal end configured to drive the primary piston from the first mode into the intermediate mode during transition of the shaft from the first position into the second position; and

a flow selector button:

arranged on the housing;

coupled to the shaft; and

configured to transition the shaft between the first position and the second position.

14 . The system of claim 13 , further comprising:

a first spring configured to bias the momentary shutoff valve in the open mode;

a second spring configured to bias the primary piston in the first mode; and

a third spring configured to bias the secondary flow selector valve in the second mode.

15 . A system comprising:

a housing comprising a fluid inlet fluidly coupled to a fluid supply;

a cavity fluidly coupled to and downstream of the fluid inlet;

a momentary shutoff valve:

fluidly coupled to and interposed between the fluid inlet and the cavity; and

configured to:

pass fluid from the fluid inlet into the cavity in an open mode; and

block passage of fluid from the fluid inlet into the cavity in a closed mode;

a momentary button:

arranged on the housing; and

configured to transition the momentary shutoff valve between the open mode and the closed mode;

a first nozzle arranged on a distal end of the housing;

a second nozzle arranged on the distal end of the housing adjacent the first nozzle; and

a primary flow selector valve:

fluidly coupled to and downstream of the cavity; and

comprising:

a primary valve seat; and

a primary piston:

unseated from the primary valve seat in an first mode to:

 pass fluid from the cavity to the first nozzle; and

 block passage of fluid from the cavity to the second nozzle; and

seated on the primary valve seat in an intermediate mode to:

 pass fluid from the cavity to the second nozzle; and

 block passage of fluid from the cavity to the first nozzle.

16 . The system of claim 15 :

wherein a primary piston is:

unseated from the primary valve seat in a first mode to:

pass fluid from the cavity to the first nozzle; and

block passage of fluid from the cavity to a secondary flow selector valve; and

seated on the primary valve seat in an intermediate mode to:

pass fluid from the cavity to the secondary flow selector valve; and

block passage of fluid from the cavity to the first nozzle; and

further comprising:

a third nozzle arranged on the distal end of the housing adjacent the second nozzle and the first nozzle;

the secondary flow selector valve:

fluidly coupled to and downstream of the primary flow selector valve; and

comprising:

a secondary valve seat; and

a secondary piston:

 unseated from the secondary valve seat in a second mode to:

 pass fluid from the primary flow selector valve, in the intermediate mode, to the second nozzle; and

 block passage of fluid from the primary flow selector valve, in the intermediate mode, to the third nozzle; and

 seated on the secondary valve seat in a third mode to:

 pass fluid from the primary flow selector valve, in the intermediate mode, to the third nozzle; and

 block passage of fluid from the primary flow selector valve, in the intermediate mode, to the second nozzle;

a shaft:

coupled to the secondary piston;

operable in:

a first position locating the secondary piston in the third mode; and

a second position locating the secondary piston in the second mode; and

comprising a distal end configured to drive the primary piston from the first mode into the intermediate mode during transition of the shaft from the first position into the second position; and

a flow selector button:

arranged on the housing;

coupled to the shaft; and

configured to transition the shaft between the first position and the second position.

17 . The system of claim 16 , further comprising:

a first spring configured to bias the momentary shutoff valve in the open mode;

a second spring configured to bias the primary piston in the first mode; and

a third spring configured to bias the secondary flow selector valve in the second mode.