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FIELD OF THE INVENTION 
   The present invention relates to a pull-out sink faucet, and more particularly, to a pull-out sink faucet with independent hot and cold water control and a pull-out head that changes between a spray mode and a stream mode when attached or detached from the faucet. 
   BACKGROUND OF THE INVENTION 
   Faucets are often provided with a pull-out head. The pull-out head allows the user to point water flow from the pull-out head to destinations where the flow is useful and where conventional faucets may not reach. For example, when washing pots and pans, the user may pull out the head and direct the flow into the pots and pans rather than moving about the pots or pans under the faucet. Thus, the pull-out head is typically much lighter and much easier to negotiate then the item that is being washed. 
   Faucets with pull-out heads have offered varied output patterns. To that end, output patterns have included a stream pattern, which is typically from an aerator or a spray pattern, which is typically from a spray ring or an arrangement of nozzles. A switch or the like, which requires manual actuation by the user, is typically employed to switch between the output patterns available. In addition, flow control is typically adjusted by a singular mixing valve rather than independent hot and cold water control valves. As such, pull-out head faucets may require the user to manually switch between spray modes and use a single mixing valve to regulate water flow and temperature. 
   Accordingly, it is desirable to provide an improved pull-out head faucet that switches between the output spray patterns without requiring the use of a manual switch and further provide independent hot and cold water control to the faucet. 
   SUMMARY OF THE INVENTION 
   A dual-handle control faucet is constructed in accordance with the present invention and includes a pull-out head and a faucet base. The pull-out head is operable between a first water discharge pattern and a second water discharge pattern. The pull-out head switches from the first water discharge pattern to the second water discharge pattern upon disengagement with the faucet base, which provides for hands-free switching between two spray patterns. 
   Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiments of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The present invention will become more fully understood from the appended claims, the detailed description, and the accompanying drawings of the exemplary embodiments wherein: 
       FIG. 1  is an environmental view of a pull-out faucet having a pull-out head and independent hot and cold water controls constructed in accordance with the principles of the present invention; 
       FIG. 2  is a perspective top view of a faucet base plate of the pull-out faucet of  FIG. 1 ; 
       FIG. 3  is a perspective view of a central body of the pull-out faucet of  FIG. 1 ; 
       FIG. 4  is an exploded perspective view of the components of the pull-out head of the present invention; 
       FIG. 5  is a perspective view of a flow toggle of  FIG. 4 ; 
       FIG. 6  is a perspective view of an aerator housing of  FIG. 4 ; 
       FIG. 7  is a perspective view of an aerator assembly of  FIG. 4 ; 
       FIG. 8  is a cross-sectional view of the pull-out head in a stream mode constructed in accordance with the present invention; 
       FIG. 9  is a cross-sectional view of the pull-out head in a spray mode; 
       FIG. 10  is an exploded perspective view of the components of the pull-out head constructed in accordance with an alternative embodiment of the present invention; 
       FIG. 11  is a perspective view of a flow toggle of  FIG. 10 ; 
       FIG. 12  is a perspective view of a diverter of  FIG. 10 ; 
       FIG. 13  is a cross-sectional view of the pull-out head of a  FIG. 10  shown in the stream mode; 
       FIG. 14  is a cross-sectional view of the pull-out head of  FIG. 10  shown in the spray mode; 
       FIG. 15  is a perspective view of an underbody structure constructed in accordance with an alternative embodiment of the present invention; 
       FIG. 16  is a detailed view of the underbody structure of  FIG. 15  in partial cross-section; and 
       FIG. 17  is a perspective exploded view of an exemplary lavatory assembly constructed in accordance with an alternative embodiment of the present invention. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   The following description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. 
   With reference to  FIGS. 1 ,  2  and  3 , a pull-out faucet of the preferred embodiment of the present invention is generally indicated by reference numeral  10 . The pull-out faucet  10  includes a faucet base  12  to which a spout  14  is connected. The faucet base  12  includes a hot water control  16 , and a cold water control  18 , both of which provide fluid regulation and are disposed on opposite ends of the faucet base  12 . The faucet base  12  further includes a central body  20  into which the fluid flows from the hot and cold water control  16 ,  18 . A faucet cowling  22  provides a decorative cover for the faucet base  12  and protects the faucet base  12  from the environment in which it was installed. The spout  14  is composed of a swivel base  24  and a neck  26 . A pull-out head  28  is configured to be removably mounted to the spout  14 . The pull-out faucet  10  is conventionally mounted to a sink  30  (shown in shadow) or any other suitable location. Conventional mounting of the pull-out faucet  10  further includes connection to a conventional hot water supply line  32  and a conventional cold water supply line  34 . 
   The hot water control  16  further includes a hot water regulator or valve  36  that is seated in a hot water control mounting body  38 . A hot water supply line connection point  40  is connected to the hot water control mounting body  38 . A hot water cupper pipe  42  connects the hot water control mounting body  38  to the central body  20 . The cold water control  18  further includes a cold water regulator or valve  44  that is seated in a cold water control mounting body  46 . A cold water supply line connection point  48  is connected to the cold water control mounting body  46 . A cold water cupper pipe  50  connects the cold water control mounting body  46  to the central body  20 . 
   The central body  20  includes a hot fluid input  52 , a cold fluid input  54 , and a mixed fluid output  56 . The control body  20  also includes a hose pass-through  58 . The control body  20  is connected to the faucet body  12 . One skilled in the art will readily appreciate that the central body  20  may be located at various point in the faucet base  12  and be secured by various forms of connection. 
   In a conventional installation, as shown in  FIG. 1 , the pull-out faucet  10  is mounted on top of a deck  64  (shown in shadow) of the sink  30 . Positioned in a central location on the faucet base plate  60  is the central body  20 , from which the hot water cupper pipe  42  and the cold water cupper pipe  50  extend to the hot water control  16  and cold water control  18 , respectively. The hot water cupper pipe  42  connects to the hot water regulator  36  contained within the hot water control mounting body  38 . The hot water control mounting body  38  is also configured to accept a hot water supply line  32  at the hot water supply line connection point  40 . As such, the hot water regulator  36  controls the flow of hot water into the central body  20 , thereby controlling the amount of hot water emitted from the pull-out head  28 . The cold water cupper pipe  50  connects to the cold water regulator  44  contained within the cold water control mounting body  46 . The cold water control mounting body  46  is also configured to accept a cold water supply line  34  at the cold water supply line connection point  48 . The cold water regulator  44 , like hot water regulator  36 , controls the flow of cold water to the pull-out head  28 . 
   The faucet base  12  is mounted to the deck  64  of the sink  30 . The hot water control mounting body  38  and the cold water control mounting body  46 , however, pass through the deck  64  allowing hot and cold water supply lines  32 ,  34  to be connected to the hot and cold water supply line connection points  40 ,  48 , respectively, beneath the deck  64 . It should be appreciated by one skilled the art that decorative cowlings may be used to cover various components of the pull-out faucet  10 . These cowlings may serve to protect the components covered by the cowling from the elements inherent in a sink installation or may serve the sole function of aesthetic appeal. 
   One skilled in the art will readily appreciate that mounting configurations of the pull-out faucet  10  may take many forms, such that, the faucet  10  may be mounted to a conventional sink, a wash tub, a bath tub, or any location requiring a regulated water supply. The various locations, therefore, may motivate many possible types of installations resulting in various components mounted above or beneath the deck of the sink or the like. Other types of installations may exclude the sink or the sink deck altogether. 
   The central body  20  is connected to the hot water cupper pipe  42  and the cold water cupper pipe  50  at the hot fluid input  52  and the cold fluid input  54 , respectively. Variable amounts of hot and cold water mix within the central body  20  and flow out of the mixed fluid output  56 . The mixed fluid output  56  is connected to a hose  66 , which passes through the spout  14  and is ultimately connected to the pull-out head  28 . One skilled in the art will readily appreciate that many faucet spout and faucet base configurations are possible; such that, the faucet base of the preferred embodiment can be connected to many different spout configurations, while the faucet spout of the preferred embodiment can connected to many different faucet base configurations. 
   The spout  14  includes the swivel base  24  and the neck  26 , from which the pull-out head  28  is detached. The pull-out head  28  is attached to the hose  66  which includes a weight  68 , threaded connectors  70  and quick-disconnect connectors  72 . The hose  66  is connected to the mixed fluid output  56  of the central body  20  and then connected to the pull-out head  28 . The hose  66  when connected to the mixed fluid output  56  is passed through the deck  64  of the sink  30 , which may provide a loop of hose slack  74  to hanging beneath the deck  64 . The weight  68  is coupled to the hose  66  along a general mid-point of the hose slack  74 . The hose  66  may be further divided into sections and secured by the threaded connectors  70  or the quick-disconnect connectors  72 . Use and placement of the weight  68 , the threaded connectors  70 , and quick-disconnect connectors  72  may be installation dependent, therefore, use, placement, or exclusion of the weight  68 , threaded connectors  70 , and the quick-disconnect connectors  72  do not serve to limit the invention or its operability. 
   The fluid flow path of the pull-out faucet  10  originates with the hot and cold water supplied by the hot and cold water supply lines  32 ,  34  that are connected to the hot water supply line connection point  40  and the cold water supply line connection point  48 , respectively. Hot and cold water flow into the hot water control mounting body  38  and the cold water control mounting body  46 , respectively. The hot water regulator  36  and the cold water regulator  44  regulate the amount of hot and cold water that flows into central body  20  through hot fluid input  52  and the cold fluid input  54  via the hot water cupper pipe  42  and the cold water cupper pipe  50  respectively. The now mixed hot and cold water exits the central body  20  through the mixed fluid output  56 . The hose  66 , connected to the mixed fluid output  56 , carries the now mixed water beneath the deck  64  of the sink  30  and then back up through the deck  64  as the hose  66  passes through the hose pass-through  58  of the central body  20 . The hose  66  continues to carry the mixed water though the spout  14  and connects with the pull-out head  28  at the end of the spout  14 . The mixed water is ejected through the pull-out head  28  for use in the sink  30  or the like. 
   With reference to  FIGS. 4 ,  5 ,  6   a ,  6   b , and  7 , pull-out head  28  includes a retainer ring  76  that passes through an outer housing  78  to connect to a hose connector  82 . A spring  80  and a first sealing ring  84  are connected to the hose connector  82 . A rubber gasket  86 , a hold-down nut  88 , and a rubber washer  90  are contained within an aerator assembly  92 . A second sealing ring  94  is connected to an aerator housing  96  that connects with the outer housing  78 . 
   The hose connector  82  further includes a hose connection point  98 , which may connect with the hose  66  using a first threaded portion  100 . A second threaded portion  102  connects with the retainer ring  76 . A first sealing ring seat  104  is configured to accept the first sealing ring  84 . A sealing face  106  defines a flow output orifice  108  that contains a flow deflector  110 , a flow deflector lip  112 , and standoffs  114 . The aerator housing  96  further includes an aerator assembly seat  116 , a spray ring  118 , and a second sealing ring seat  120  configured to accept the second sealing ring  94 . 
   With reference to  FIGS. 4 ,  8 , and  9 , the pull-out head  28  is configured such that a portion of the hose connector  82  passes from inside the outer housing  78  and connects with the retainer ring  76 , which sits generally atop the outer housing  78 . The retainer ring  76  is connected to the hose connector  82  by rotating the retainer ring  76  onto the second threaded portion  102  and then both the retainer ring  76  and the hose connector  82  may move as one unit relative to the outer housing  78 . One skilled in art will readily appreciate that many other methods exist to connect the retainer ring  76  and the hose connector  82 , one such exemplary method is a snap-fit. Notwithstanding the manner by which the outer housing  78  is attached to the retainer ring  76 , the pull-out head  28  is further configured so that the spring  80  is captured between an annular flange  124  of the outer housing  78  and the hose connector  82  when the retainer ring  76  is attached to the hose connector  82 . 
   The first sealing ring seat  104  on the hose connector  82  is configured to accept the first sealing ring  84 . The seated first sealing ring  84  positions and secures the hose connector  82  in the outer housing  78  and seals the interior of the outer housing  78  above the first sealing ring  84 . Insertion of the hose connector  82  into the outer housing  78 , therefore, causes the first sealing ring  84  to contact and seal against the interior of the outer housing  82 . Furthermore, the first sealing ring  84  seals the hose connector  82  to the outer housing  78  so that the fluid within the pull-out faucet  10  is unable to travel beyond the first sealing ring  84  in the direction of the retaining ring  76 . 
   The rubber gasket  86  is configured to sit within an inner ring  122  of the hold-down nut  88 ; thus, when seated the rubber gasket  86  and the hold-down nut  88  are essentially one assembly. When the hold-down nut  88  is rotated to secure the aerator assembly  92  in the aerator housing  96 , the rubber gasket  86  may rotate with the hold-down nut  88 . Nevertheless, the rubber gasket  86  remains operable in any angular orientation even though it rotates with the hold-down nut  88 . When the hold-down nut  88  is rotated over the aerator assembly  92 , the hold-down nut  88  secures the rubber washer  90  against the aerator assembly  92 ; thus, securing both the rubber washer  90  and the aerator assembly  92  within the aerator housing  96 . 
   The hose connector  82  includes the sealing face  106  that defines the flow output orifice  108 . The flow deflector  110  and the flow deflector lip  112  extend from the output orifice  108  by use of the standoffs  114 . The sealing face  106  includes an annular arcuate portion  126  and within the annular arcuate portion  126  is the flow output orifice  108 . The hose connector  82 , thus, has an internal channel  128  that runs from the hose connector point  98  to the flow output orifice  108 . Extending from the flow output orifice  108  is the flow deflector  110 , which contains a flow deflector lip  112 . The flow deflector  110  is disposed above the flow output orifice  108  by four standoffs  114 . 
   With the hose connector  82  connected with the retaining ring  76  and the aerator assembly  92  secured within the aerator housing  96 , the outer housing may be secured to the aerator housing  96  to ultimately assemble the pull-out head  28 . The aerator housing  96  is configured to accept the second sealing ring  94 , such that when the outer housing  78  is rotated to attach to the aerator housing  96  the second sealing ring  94  is compressed between the outer housing  78  and the aerator housing  96 . Compression of the second sealing ring  94  prevents fluid from exiting the pull-out head  28  from the area where the outer housing  78  and the aerator housing  96  connect. 
   In  FIG. 8 , the pull-out head  28  is presented in stream mode, which is generally indicated by reference numeral  132 . In  FIG. 9 , the pull-out head  28  is presented in a spray-mode, which is generally indicated by reference numeral  130 . Switching between the spray-mode  130  and the stream-mode  132  is effectuated by movement of the hose connector  82 , such that moving the hose connector  82  to the bottommost point of its travel results in the pull-out head  28  entering the stream-mode  132 . In turn, moving the hose connector to the topmost point of its travel results in the pull-out head  28  entering the spray-mode  130 . 
   In the spray-mode  130 , the hose connector  82  is in the topmost point of its travel, such that the flow deflector lip  112  of the flow deflector  110  has moved up and sealed against the rubber gasket  86 . Sealing of the flow deflector lip  112  against the rubber gasket  86  prevents the fluid from continuing past the rubber gasket  86 , thereby forcing the fluid to flow over and past the outside of the hold-down nut  88 . As indicated by flow-indicating arrow  134 , the fluid continues into an annular channel  136  and then is finally emitted from a spray ring  118 . 
   In the preferred embodiment of the present invention, the spray ring contains 16 rectangular openings  142  with the dimensions of about 0.04 inches by about 0.05 inches. The fluid exits the rectangular openings  142  in spray columns that are individually perceivable when compared to the column of flow from the aerator assembly  92 . One skilled in the art will readily appreciate that the rectangular openings  142  may be sized in various dimensions. To that end, the rectangular openings  142  may be circular openings or any other suitable geometric shape. Furthermore, the dimensions may be sized in any suitable configuration as to produce streams from the spray ring  118 . 
   In the stream-mode  132 , the hose connector  82  is in the bottommost point of its travel, such that the sealing face  106  and the annular arcuate portion  126  seal against the rubber gasket  86 . When sealed, the flow deflector  110  is disposed beneath the rubber gasket  86 , such that the fluid is forced to flow out of the flow output orifice  108  and into the aerator assembly  92 . To that end, the fluid is unable to flow beyond where the annular arcuate portion  126  has sealed against the rubber gasket  86 , which prevents any fluid from flowing through to the spray ring  118 . As such, fluid flowing from the pull-out head  28  in the stream mode  132  only flows though the aerator assembly  92  in a stream output. 
   In the preferred embodiment of the present invention, the aerator assembly  92  is commercially available from Neoperl, Inc. (Waterbury, Conn.) under the model name Perlator. The fluid exits the aerator assembly  92  in a large column and lacks the individually perceivable streams when compared to water exiting the spray ring  18  when the pull-out head  28  is in the spray mode  130 . One skilled in the art will further appreciate that the ultimate pattern produced can be varied with modification of the aerator assembly  92  or the spray ring  118 . 
   Switching between the spray mode  130  and the stream mode  132  may be effectuated by attachment or detachment of the pull-out head  28  to the end of the neck  26  of the spout  14 . With the pull-out head  28  attached to the spout  14 , the pull-out head  28  remains in the stream mode  132  because the end of the neck  26  has pushed the retaining ring  76  and thus the hose connector  82  down to the bottommost point of its travel. 
   In  FIG. 8 , the pull-out head  28  is shown in the stream mode  132  and, as such, the spring  80  is configured to be in a rest condition  138 . In  FIG. 9 , the pull-out head is shown in the spray mode  130  and, as such, the spring  80  is configured to be in a compressed condition  140 . It, therefore, follows that movement of the spring  80  from the rest position  138  ( FIG. 8 ) to the compressed condition  140  ( FIG. 9 ) generates a spring force in the spring  80 ; such that, the spring  80  imparts a predetermined force in an attempt to return to its rest position  138 . 
   The pull-out head  28 , however, is configured to remain in the spray mode  130  while water or a like fluid flows through the pull-out head  28 . Fluid flow through the pull-out head  28  in the spray mode  130 , therefore, imparts a sufficient pressure on the sealing face  106  to maintain the pull-out head  28  in the spray mode  130 . As such, when the fluid flow is discontinued, the spring force imparted by the spring  80  in the compressed condition  140  is sufficient to restore the pull-out head  28  to the stream mode  132 . It follows, therefore, that the spring force imparted by the spring  80  in the compressed condition  140  is less than the pressure exerted on the sealing face  106  of the hose connector  28  in the spray mode  130 . 
   Typically when the pull-out head  28  is attached to the neck  26 , the pull-out head remains in the stream mode  132 . When a user (not shown) wishes to detach the pull-out head  28  from the neck  26 , the user may grasp the outer housing  78  or the aerator housing  96  and draw the pull-out head  28  away from the neck  26  and manipulate the head accordingly. As the user draws the pull-out head  28  away from the neck  26 , the hose  66 , the weight  68 , and the neck  26  are configured to slightly restrain the pull-out head  28  so that the action of drawing the pull-out head  28  out of the neck  26  causes the pull-out head  28  to change from the stream mode  132  to the spray mode  130 . 
   As noted above, if fluid is flowing through the pull-out head  28 , the head  28  will remain in the spray mode  130 . If no fluid is flowing through the head, the pull-out head  28  will revert back to the stream mode  132  when the force generated by the action of drawing the pull-out head  28  out of the neck  26  no longer exists. Furthermore, the pull-out head  28  may drawn from the neck  26  while fluid flows through the pull-out head  28 , but the user may subsequently discontinue fluid flow through the pull-out head  28  by, among other things, shutting off the faucet  10 . When fluid flow is discontinued, the pull-out head  28  reverts back to the stream mode  132 . Regardless of whether the pull-out head  28  is attached or detached to the neck  26  or whether fluid is flowing through the pull-out head  28 , the user may manually push or pull on the retaining ring  76  to manually switch the pull-out head  28  between the spray mode  130  and the stream mode  132 . 
   A user may also detach the pull-out head  28  from the neck  26  of the faucet  10  but grasp the retaining ring  76  instead of the outer housing  78  or aerator housing  96  of the pull-out head  28 . In doing so, the pull-out head  28  is prevented from switching into the spray mode  130 . The user may subsequently grasp the retainer ring  76  and pull to switch the pull-out head  28  from the stream mode  132  to the spray mode  130 . 
   It should be appreciated by one skilled in the art that the retaining ring  76  may take many forms or may not be included with the pull-out faucet  10 . For example, the retainer ring  76  may take the form of a knob or collar attached to the hose  66  or any such head control mechanism that assists the user in switching between the spray patterns of the pull-out head  28 . As such, one skilled in the art should further appreciate that the spray mode  130  and the stream mode  132  or exemplary spray patterns and the pull-out head  28  may be configured with alternative spray pattern configurations. 
     FIGS. 10 through 14  depict the pull-out head  28  constructed in accordance with a preferred alternative embodiment of the present invention. As such, reference numerals that depict similar structures may be used to denote structures common to the various embodiments. It should be appreciated by one skilled in the art that structures disclosed in any one embodiment may be interchangeable with other embodiments. It should also be appreciated that the disclosed embodiments of the present invention are descriptive in nature and do not serve to limit the invention to the disclosed embodiments. 
   With reference to  FIGS. 10 ,  11 , and  12 , the pull-out head  28  includes an upper housing piece  200  that is connected to a lower housing piece  202  and hereinafter collectively referred to as a housing  204 . A flow toggle  208  is contained within the housing  204  and includes a threaded portion  236  that may connect to the hose  66 , which passes through the upper housing  200 . A spring  206 , is contained between the flow toggle  208  and the upper housing  200 . The flow toggle  208  includes positioning lugs  238  and a flow toggle gasket seat  210  in which a flow toggle gasket  212  is seated. The flow toggle  208  further includes a flow duct  214 , a flow duct top gasket seat  216 , and a flow duct bottom gasket seat  218 . A flow duct top gasket  220  is seated in the flow duct top gasket seat  216  and a flow duct bottom gasket  222  is seated in the flow duct bottom gasket seat  218 . 
   The flow duct  214  of the flow toggle  208  is configured to reciprocate through a central aperture  224  defined by a diverter  226 . The diverter  226  further defines an annular plurality of apertures  228  arranged around the central aperture  224 . It should be appreciated that the central aperture  224  is not fluidly connected to the annular plurality of apertures  228  and vice-versa. In addition, the diverter  226  is connected to the lower housing piece  202  and secured in place when the lower housing piece  202  is connected with the upper housing  200 . 
   Secured between the diverter  226  and the lower housing  202  is a spray ring  230 . A flow screen  232  is contained within the spray ring  230 . A flow screen gasket  234  is disposed between the diverter  226  and the flow screen  232 . As such, the diverter  232  secures the flow screen gasket  234 , the flow screen  232 , and the spray ring  230  in the lower housing piece, when the upper housing piece  200  is secured to the lower housing piece  202 . 
   The diverter  226  may be configured to contact the flow screen gasket  234  such that when water flows through the central aperture  224  of the diverter  226  the flow screen gasket  232  may prevent water from traveling through the spray ring  230 . In turn, when water flows through the annular plurality of apertures  228  of the diverter  226  the flow screen gasket  234  may prevent water from traveling through the flow screen  232 . 
   The upper housing  200  may be configured to contain the spring  206  between flanges  240  and an exterior face  242  of the flow toggle gasket seat  210 . The retaining lugs  238  may be configured to maintain the position of the flow toggle  208  within the upper housing  200 . The upper housing  200  may be additionally configured to connect to the lower housing  202  with conventional screw threads. One skilled in the art will readily appreciate that many methods exist to assemble the housing; some such examples include snap-fits, bonding, or mechanical fasteners. 
   With reference to  FIGS. 13 and 14 , the pull-out head  28  is presented in a stream-mode ( FIG. 13 ) generally indicated by reference numeral  132  and in a spray-mode ( FIG. 14 ) generally indicated by reference numeral  130 . Movement of the flow toggle  208  results in the motion of the flow duct  214  in and out of central aperture  224  of the diverter  226 . When the pull-out head  28  is in the stream mode  132 , the flow toggle  208  reaches the bottom of its motion within the housing  204 . In the stream mode  132 , the flow duct top gasket  220  enters and seals the central aperture  224  of the diverter  226 . When the pull-out head  28  is in the spray mode  130 , the flow toggle  208  reaches the top of its motion. In the spray mode  130 , the flow duct bottom gasket  222  seals within the central aperture  224  thereby disposing the flow duct  214  above the entrance to the central aperture  224 . 
   In the stream mode  132 , the flow duct top gasket  220  has entered and sealed the central aperture  224 . As such, the flow duct  214  ejects water below the now sealed central aperture  224 . Because the flow duct top gasket  220  has sealed the central aperture  224  above the flow duct  214 , water ejected from the flow duct  214  can only exit through the flow screen  232  of the pull-out head  28 . 
   In the spray mode  130 , the flow duct bottom gasket  222  has sealed the central aperture  224 . Because the central aperture  224  has been sealed, water flowing from the flow duct  214  must flow through the annular plurality of apertures  228  of the diverter  226 . Water flowing through the annular plurality of apertures  228  then flows through the spray ring  230 . 
   One skilled in the art will readily appreciate that the flow screen  232  is a modified conventional aerator screen, which causes the water to flow from the pull-out head  28  in a generally uniform column. The spray ring  230 , in contrast, causes the water to spray in generally a cone-shaped pattern where individual streams of water may be recognizable. One skilled in the art will further appreciate that the ultimate pattern produced can be varied with modification of flow screen  232  or the spray ring  230 . As such, the flow path of the water is determined by movement of the flow toggle  208  through the diverter  226 ; notwithstanding that fact, the ultimate pattern of water produced can be varied, made the same, or even eliminated or sealed where no water would flow altogether. 
   Switching between the stream mode  132  and the spray mode  130  may be effectuated by attachment or detachment of the pull-out head  28  to the end of the neck  26  of the spout  14 . With the pull-out head  28  attached to the spout  14 , the pull-out head  28  remains in the stream mode  132  because the end of the neck  26  has pushed the flow toggle  208  down to the bottommost point of its travel. With the flow toggle  208  down to the bottommost point of its travel, the flow duct  214  discharges water below the central aperture  224  of the diverter  226  and water is delivered in the stream mode  132 . 
   In  FIG. 13 , the pull-out head  28  is shown in the stream mode  132  and, as such, the spring  206  is configured to be in a rest condition  138 . In  FIG. 15 , the pull-out head is shown in the spray mode  130  and, as such, the spring  206  is configured to be in a compressed condition  140 . It, therefore, follows that movement of the spring  206  from the rest position  138  ( FIG. 13 ) to the compressed condition  140  ( FIG. 14 ) generates a spring force in the spring  206 ; such that, the spring  206  imparts a predetermined force in an attempt to return to its rest position  138 . The pull-out head  28 , however, is configured to remain in the spray mode  130  while water or a like fluid flows through the pull-out head  28 . Fluid flow through the pull-out head  28  in the spray mode  130 , imparts a sufficient pressure on the bottom face  244  of the flow toggle  208  to maintain the pull-out head  28  in the spray mode  130 . As such, when the fluid flow is discontinued, the spring force imparted by the spring  206  in the compressed condition  140  is sufficient to restore the pull-out head  28  to the stream mode  132 . 
   Typically when the pull-out head  28  is attached to the neck  26 , the pull-out head remains in the stream mode  132 . When a user (not shown) wishes to detach the pull-out head  28  from the neck  26 , the user may grasp the housing  204  and draw the pull-out head  28  away from the neck  26  and manipulate the head accordingly. As the user draws the pull-out head  28  away from the neck  26 , the hose  66 , the weight  68 , and the neck  26  are configured to slightly restrain the pull-out head  28  so that the action of drawing the pull-out head  28  out of the neck  26  causes the pull-out head  28  to change from the stream mode  132  to the spray mode  130 . 
   As noted above, if fluid is flowing through the pull-out head  28 , the head  28  will remain in the spray mode  130 . If no fluid is flowing through the head, the pull-out head  28  is configured to revert back to the stream mode  132  when the force generated by the action of drawing the pull-out head  28  out of the neck  26  no longer exists. Furthermore, the pull-out head  28  may be drawn from the neck  26  while fluid flows through the pull-out head  28 , but the user may subsequently discontinue fluid flow through the pull-out head  28  by, among other things, shutting off the faucet  10 . When fluid flow is discontinued, the pull-out head  28  reverts back to the stream mode  132 . 
     FIGS. 15 and 16  depict the faucet  10  constructed in accordance with a preferred alternative embodiment of the present invention. As such, reference numerals that depict similar structures may be used to denote structures common to the various embodiments. It should be appreciated by one skilled in the art that structures disclosed in any one embodiment may be interchangeable with other embodiments. It should also be appreciated that the disclosed embodiments of the present invention are descriptive in nature and do not serve to limit the invention to the disclosed embodiments. 
   With reference to  FIGS. 15 and 16 , an underbody assembly is generally indicated by reference numeral  300 . The underbody assembly  300  is a singular cast component that may include components found in the faucet base  12 . To that end, the underbody assembly  300  is configured to include the hot water control mounting body  38  and the hot water supply line connection point  40 . The underbody assembly  300  also includes the cold water control mounting body  46  and the hot water supply line connection point  48 . In contrast to the cold water cupper pipe  50 , the central body  20 , and the hot water cupper pipe  42 , the underbody assembly  300  is constructed as a singular unit. As such, a connection member  302  connects the cold water control mounting body  46  and the hot water control mounting body  38 . 
   A mounting collar  304  connects to the connection member  302 . The mounting collar is configured to connect to the spout  14  and is further configured to serve as a fluid connection between the connection member  302  and the spout  14 . The mounting collar  304  additionally defines a pop-rod channel  306  through which a pop-rod  308  passes ( FIG. 17 ). A vacuum breaker seat  310  is configured to accept a vacuum breaker  312  ( FIG. 17 ). It should be appreciated by one skilled in the art that a vacuum breaker may be located at various points within the faucet  10 . As shown, the vacuum breaker  312  is located in the underbody assembly  300 , but may be located in either the hot or cold water control mounting bodies  38 ,  46  or other suitable locations. 
   Similar to the central body  20 , the underbody assembly includes a hose pass-through  58 , which is disposed in a central location on the underbody assembly  300 . The hose pass-through  58  is slightly canted to accommodate the geometry of the underbody assembly  300  but still allow for the hose  66  to pass through the hose pass-through  58  unimpeded. The mixed fluid output  56  is configured to connect to the hose  66  ( FIG. 1 ). 
     FIG. 17  depicts the faucet  10  presented in a lavatory configuration and constructed in accordance with a preferred alternative embodiment of the present invention. As such, reference numerals that depict similar structures may be used to denote structures common to the various embodiments. It should be appreciated by one skilled in the art that structures disclosed in any one embodiment may be interchangeable with other embodiments. It should also be appreciated that the disclosed embodiments of the present invention are descriptive in nature and do not serve to limit the invention to the disclosed embodiments. 
   While there are many similar structures in a lavatory installation when compared to a kitchen installation, one frequent configuration difference is distance between the hot water supply line connection point  40  and the cold water supply line connection point  48 . In a typical lavatory installation this distance is four inches (about 100 millimeters), but in a kitchen installation this distance is about eight inches (about 203 millimeters). Notwithstanding typical installations, some faucet configurations only have a single water control which would not necessitate the above spacing. To that end, many configurations are possible and furthermore scaling of the components from a kitchen to a lavatory installation is also possible to make the faucet  10 , regardless of the installation, more appealing to the consumer. 
   The description of the invention is merely exemplary in nature and, thus, variations that do not depart from the gist of the invention are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the invention.

Summary:
A dual-handle control faucet that includes a pull-out head and a faucet base. The pull-out head is switchable between a first water discharge pattern and a second water discharge pattern. The pull-out head switches from the first water discharge pattern to the second water discharge pattern upon disengagement with the faucet base, which provides for hands-free switching between to two spray patterns.