Abstract:
An oral hygiene device, which includes a hand-held cylindrical device having a controllable dial and water-emitting nipple created by water pressure is disclosed. The oral hygiene device includes a cylindrical body which is hand-held, a control dial, having a valve, mounted onto the body; a nipple mounted at its proximal end to the body, the nipple having a slit on its distal end and being interchangeable; a conduit mounted between the body and an open-shutoff valve; and an open-shutoff valve mounted between the conduit and a connector body mounted to a water source. The device cleanses and dislodges food particles from teeth and massages the gums.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
   Continuation-in-Part of U.S. application Ser. No. 11/531,674 filed on Sep. 13, 2006 now abandoned, which is a continuation of U.S. application Ser. No. 10/948,024 filed on Sep. 23, 2004 now abandoned. 

   FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
   Not Applicable 
   INCORPORATION BY REFERENCE OF MATERIAL SUBMITTED ON A COMPACT DISK 
   Not Applicable 
   SPECIFICATION 
   TO ALL WHOM IT MAY CONCERN 
   Be it known that I, Chandrakant R. Yande, a citizen of the United States, have invented new and useful improvements in an oral hygiene device as described in this specification. This application claims the benefit of my previously filed United States Provisional Application Number 11/531,674, filed on Sep. 13, 2006, which is a continuation of U.S. application Ser. No. 10/948,024 filed on Sep. 23, 2004 now abandoned. 
   BACKGROUND OF THE INVENTION 
   This invention relates to dental care and, more particularly, to an oral hygiene device which comprises a hand-held cylindrical device having a controllable dial and pulsating slit nipple created by water pressure. This device cleanses and dislodges food particles from teeth and massages the gums. 
   DESCRIPTION OF THE PRIOR ART 
   In the prior art, numerous oral hygiene devices are provided. For example, one patent teaches a device for use with cold-water shutoff valve of the domestic supply line and with cold and hot water shutoff valves, as a combination, of the supply lines under a sink in the bathroom. In addition, many useful patented devices provided water pulsating jets or nozzles for dental hygiene; however, these devices present some issues. In conventional dental hygiene devices, a desirable water pressure is acquired by means of pumps and by means of water energy at the faucet. Many complex situations are applied to achieve the desired results. The use of electricity near by water means invites danger. Currently available devices often provide many short-lived parts which are expensive to replace. Furthermore, the use of presently available devices is often cumbersome. Some of the problems have been partially solved by implementation of improved devices, but these devices continue to encounter significant problems. 
   For example, U.S. Pat. No. 3,227,158, issued to Mattingly, teaches a pulsed water jet through nozzle under the driving action of an electrically operated pump. The rate of repetition of pulses dislodges food particles and massages the gums. 
   U.S. Pat. No. 3,542,017, issued to Adams, provides some improvement over other devices and employs a fluid oscillator thereby eliminating shocks. The device creates a pulsating rate to dislodge food particles and to massage the gums. 
   U.S. Pat. No. 4,141,352, issued to Ebner et al., teaches a liquid reservoir, a jet and a reciprocating piston. The device delivers spurts of liquid through its jet to massage biological tissues of gums and dislodge particles. The oral irrigator operates on electricity. 
   U.S. Pat. No. 3,820,532, issued to Eberhardt et al., provides a turbine which drives a rotary interrupter to control the speed and a nozzle, which can be moved in various angles. This patent also teaches an additive added to water for use with the device. Similarly, in U.S. Pat. No. 3,545,435, issued to Hollander et al., the water pressure from a faucet is used to turn the turbine and the turbine drives a pump. By adding water pumps to the device, increased water pressure is delivered to a user&#39;s mouth. 
   U.S. Pat. No. 5,399,089, issued to Eichman et al., teaches the concept of priority to the rate of flow of water through the handle of an oral irrigator. 
   U.S. Pat. No. 6,740,053, issued to Kaplowitz, provides a device mounted to a faucet or a showerhead to deliver a higher volume of water than other devices. 
   While the above-described devices fulfill their respective and particular objects and requirements, they do not describe an oral hygiene device that provides for the advantages of the present oral hygiene device. In this respect, the present oral hygiene device substantially departs from the conventional concepts and designs of the prior art. Therefore, a need exists for an improved oral hygiene device. 
   SUMMARY OF THE INVENTION 
   The present oral hygiene device comprises a novel and improved hand-held cylindrical device having a control dial and an interchangeable, water-powered slit nipple which delivers numerous water pulses for oral irrigation, cleansing and flossing teeth. The present device is simple and is not a complicated mechanism. It is, therefore, an object of the present oral hygiene device to provide an oral irrigator. The present device is powered solely by the applied pressure from a domestic water supply source. The endurance, the powerful slits of water and improved performance are other objects of the present invention. 
   This invention provides a practical and an endurable solution for massaging biological tissues of gums. Furthermore, the present invention eliminates the use of an electrical pump, a reservoir and a bulky storage of liquid on a sink counter. The device is very practical. It has an instant use and the device is not directly connected to a faucet or a showerhead. Accordingly, like a toothbrush, this device is usable at practically any time of the day or any location. Still another object of the present dental hygiene device invention is that an adult can use the full force of the water pressure coming from the open-shutoff orifice valve and provides a device that children can manage themselves to use the variable force of the hand held device for their individual needs. Accordingly, the present device permits an instant use for water flossing. It permits the directional dial to shut off and open water instantly. It allows children to open and stop the water flow of the hand held device immediately. It permits a user to hold the hand-held device like a toothbrush. The present invention may be connected to a faucet water supply valve under a sink in the bathroom. Accordingly, a clear and complete understanding of the present invention and its usefulness that can be seen from the submitted and accompanying drawings and its supported claims. 
   Accordingly, a general purpose of the present invention is to provide a novice and better or improved an oral dental hygiene device and to outperform limitations of the known prior arts. Considering the endurance, the powerful water pulses and the performance capabilities of the present oral hygiene device, a further object of the present invention is easy and economic production of said device. 
   There has thus been outlined, rather broadly, the more important features or an oral hygiene device that the detailed description thereof that follows may be better understood and in order that the present contribution to the art may be better appreciated. There are, of course, additional features of the oral hygiene device that will be described hereinafter and which will form the subject matter of the claims appended hereto. 
   In this respect, before explaining at least one embodiment of the oral hygiene device in detail, it is to be understood that the oral hygiene device is not limited in its application to the details of construction and to the arrangements of the components set forth in the following description or illustrated in the drawings. The oral hygiene device is capable of other embodiments and being practiced and carried out in various ways. Also, it is to be understood that the phraseology and terminology employed herein are for the purpose of descriptions and should not be regarded as limiting. 
   As such, those skilled in the art will appreciate that the conception, upon which this disclosure is based, may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present oral hygiene device. It is important, therefore, that the claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present invention. 
   It is therefore an object of the present invention to provide an oral hygiene device which has all of the advantages of the prior art and none of the disadvantages. 
   It is another object of the present invention to provide an oral hygiene device which may be easily and efficiently manufactured and marketed. 
   It is another object of the present invention to provide an oral hygiene device which is of durable and reliable construction. 
   It is yet another object of the present invention to provide an oral hygiene device which is economically affordable and available for relevant market segment of the purchasing public. 
   Other objects, features and advantages of the present invention will become more readily apparent from the following detailed description of the preferred embodiment when considered with the attached drawings and appended claims. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a side elevation view of the oral hygiene device. 
       FIG. 2  is a side elevation view of the oral hygiene device as it would appear attached to a domestic water supply line. 
       FIG. 3  is a side elevation view of the oral hygiene device as it would appear in a hot and cold water system. 
       FIG. 4  is a side elevation view of the oral hygiene device as it would appear attached to a hot and cold water supply line system. 
       FIG. 5A  is a side elevation view of some of the components of a bi-functional coupling before they have been assembled. 
       FIG. 5B  is a side elevation view of a bi-functional coupling after they have been assembled. 
       FIG. 6A  is a top plan view of a tri-functional connector. 
       FIG. 6B  is a side elevation view of a tri-functional connector. 
       FIG. 6C  is an end view of a tri-functional connector. 
       FIG. 7A  is a side elevation view of a hex nut used with the open-shutoff orifice valve body. 
       FIG. 7B  is a side elevation view of a control valve used with the open-shutoff orifice valve body. 
       FIG. 7C  is a top plan view of a control valve used with the open-shutoff orifice valve body. 
       FIG. 7D  is a top plan view of the open-shutoff orifice valve body. 
       FIG. 7E  is a front elevation view of the open-shutoff orifice valve body. 
       FIG. 7F  is a side elevation view of the open-shutoff orifice valve body. 
       FIG. 8  is a side elevation view illustrating the open-shutoff orifice valve body attached to a conduit assembly body. 
       FIG. 9A  is a top plan view of a directional dial. 
       FIG. 9B  is a bottom plan view of a directional dial. 
       FIG. 9C  is a side elevational view of a directional dial. 
       FIG. 9D  is a side elevation view of a cylindrical body and its associated components prior to being assembled. 
       FIG. 10A  is a side elevation view illustrating a cylindrical control valve and an associated directional dial. 
       FIG. 10B  is a front elevation view illustrating a cylindrical control valve and an associated directional dial. 
       FIG. 11A  is a side elevation view of a cylindrical device. 
       FIG. 11B  is a front elevation view of a cylindrical device with an attached nipple assembly. 
       FIG. 12A  is a top plan view of a nipple assembly. 
       FIG. 12B  is a side elevation view of a nipple assembly. 
       FIG. 12C  is a front elevation view of a nipple assembly. 
   

   DESCRIPTION OF THE PREFERRED EMBODIMENT 
   With reference now to the drawings, and in particular to  FIGS. 1 through 12C  thereof, a new oral hygiene device embodying the principles and concepts of the present invention and generally designated by the reference numeral  2  will be described. 
   As best illustrated in  FIGS. 1 through 12C , the oral hygiene device  2  is shown. The specific wordings are used in these descriptions for fulfilling the requirements only and it is not to be assumed as a limitation on the present invention. 
   Referring to  FIGS. 1 and 2  and also to  FIGS. 11A ,  11 B and  12 A,  12 B, and  12 C a bi-functional coupling  18  is connected to a tri-functional connector body  19 , while the connector body  19  is connected to an open-shutoff orifice valve body  20 . A flexible and inflexible conduit assembly body  21  is connected to the orifice valve body  20 . Flexible tubing  21 A of the conduit assembly body  21  is connected to a hand-held cylindrical body  22 . A directional water pressure control valve  22 A is incorporated into the body  22 . A nipple  23  and its nipple body  23 A are attached to the hand-held cylindrical body  22 . 
   The coupling  18  comprises a central length of tubing  18 B with two ends, a first end and a second end, and furthermore, comprises a pair of hexagonal nuts  18 A that are attached to each end of the tubing. The connector body  19  essentially comprises three separate necks  19 A. Each neck  19 A has external male threads  19 B and a chamfered end  19 C. Furthermore, each neck  19 A has an internal bore  19 D that allow free flow of water through the connector body  19 . All three of the necks  19 A are coplanar with one another, with two of the necks  19 A being 180 degrees apart from each other and the third neck  19 A being 90 degrees from each of the other two necks  19 A. 
   The oral hygiene device  2  can be connected to a wide variety of pressurized water lines. However, it is preferably connected to a domestic water supply line valve  12  of a faucet on a sink for its intended use. Connecting the oral hygiene device  2  to a domestic water supply line  10  is fairly straightforward. First, a handle  12 B on a cold water supply line valve  12  is shut off. Then, one needs to disconnect nut  13  of conduit  14  from valve  12 . Next, one can reconnect the valve  12  with a nut  18 A of coupling  18  and connect the other nut  18 A of the coupling  18  to a male threaded end  19 B on the connector body  19 . Next, one can connect a threaded end  19 B of the connector body  19  to nut  13  of the cold water conduit  14 . Now, by opening the valve handle  12 B, this arrangement reestablishes the water flow to faucet  16  and now, the water under pressure is available to the control valves  20 C and  22 A. 
   As can be seen in  FIG. 2 , the domestic water supply line  10  is connected to valve  12 , with the valve having a neck  12 A and a handle  12 B. The function of the valve  12  is to open and shut off the water supply line  10 . A bracket  15  of the sink  17  is attached to wall  11 . The sink has a faucet  16 , with the faucet  16  having a handle  16 A. The nut  13 A of the conduit  14  is already connected to the faucet  16 . 
     FIG. 3  illustrates the oral hygiene device  2  as it is connected to both hot and cold water lines. In this embodiment, three separate connector bodies  19  are utilized. One of the connector bodies, hereinafter deemed the “central” connector body  19 , is connected to an orifice valve body  20  as already shown in  FIG. 1 . A coupling  18  is attached to each of the other necks  19 A of the central connector body  19 , with each of these couplings  18  being attached to a connector body  19 . The second and third connector bodies  19  used with this embodiment are then connected to the hot and cold water lines, respectively, as further detailed herein. 
     FIG. 4  highlights  FIG. 3  as it is shown connected to cold and hot water supply line valves  12  and  24 , respectively. Accomplishing this task, as before, is mechanically straightforward. First, handles  12 B and  24 A are to be shut off. Then, one can disconnect nut  13  of the conduit  14  of the cold water from valve  12  and reconnect it to the threaded end  19 B of the connector body  19 . Similarly, one can disconnect nut  13 B of the conduit  14 A of the hot water from the valve  24 . In order to have the device  2  connected to the supply lines, it needs conduits  25  and  25 C with the similar connecting nuts  25 A and  25 B at the both ends. Between the second and third connector bodies  19  highlighted and described in  FIG. 3 , one of these can be threadably attached to nut  25 A, while the other connector body  19  can be threadably attached to nut  25 B. After opening the handles  12 B and  24 A, respectively, the cold and hot water under pressure is available to the control valve  20 C of the orifice valve body  20  and to the control valve  22 A of the body  22 . 
   In  FIGS. 5A-5B , a coupling  18  is detailed. The function of the coupling  18  is to connect the water shutoff valve  12  and the connector body  19 . The coupling  18  is made of two hexagonal or of similar configurational nuts  18 A, a length of tubing  18 B, and two sleeves  18 E. The nuts  18 A are threaded in through bore  18 L head to head  18 H over the tubing  18 B. The sleeve  18 E slides over the tubing  18 B, while collar  18 C is inserted first into the nut  18 A. Once inserted, the male flare  18 F on each nut  18 A is arranged to be edge to edge of the tubing  18 B so it fits snugly. However, some deviation is clearly permitted. Once the various components of coupling  18  are assembled, the sleeves  18 E are then soldered or welded to the tubing  18 B. The spacing between the head to head of the nuts  18 A should be judged by the free rotation of the nuts  18 A over the collar  18 C of the sleeves  18 E. Another important function of the coupling  18  is that it can be connected to an open-shutoff valves  12  at any angle or at any position. The length of the tubing  18 B is to be adjusted accordingly so that the configuration seen in  FIG. 3  can be accommodated. 
     FIGS. 6A-6C  highlight the connector body  19 , which has three necks  19 A of the same diameter and of equal length. Each neck has a number of external threads that allow a number of possible components to overlay a neck  19 A and become threadably attached to the connector body  19 . The connector body  19  in the device  2  is used in several potential aspects: to connect the coupling  18  to the orifice valve body  20 , to connect the nut  13  and the nut  25 A to the cold water conduit  14 , and to connect the nut  13 B and  25 B to the hot water conduit  14 A. Each of the necks  19 A has a bore  19 D and has a chamfer  19 C. Each of the three threaded ends  19 B has a countersink  19 E. The connector body  19  has a neck  19 A. 
   Referring in detail to  FIGS. 7A-7F  of the accompanying drawings, the orifice valve body  20  has an assembly. The function of the orifice valve body  20  and control valve  20 C is to open-shutoff water under pressure to the control valve  22 A. Control valve  20 C has two ends, a first end and a second end, with at least some of the length of the control valve  20 C near the first end of the control valve  20 C has a diameter very similar to that of bore  20 H. The orifice valve body  20  has a central water channel  20 N that intersects with bore  20 H and travels through the entire orifice valve body  20 . Bore  20 H is located within orifice valve body  20  and has a diameter. The valve  20 C has an attachment  20 D, with the attachment  20 D being a cylindrical rod that has two ends, a first end and a second end. The first end of the attachment  20 D is attached to the second end of the control valve  20 C. The attachment  20 D has a keyhole  20 B on the second end of the attachment  20 D, along with an accompanying key  20 Y. The attachment  20 D has a smaller diameter than that of the control valve  20 C. The attachment  20 D has a collar  20 W, with the collar  20 W having a conventional O-ring seal. The attachment ends in a chamfer  20 X. 
   The bore  20 H has female threaded section  20 S, while the top of the bore  20 H has a plane surfacing  20 M as shown in the top view  20 Q of the orifice valve body  20 . Accordingly, the front view of the orifice valve body  20  has a depth of female threaded section  20 E and, the male threaded section  20 F, with  20 F being attached to the neck  20 G. The left hand view of the orifice valve body  20  has a female threaded section  20 K, a neck  20 P, and the chamfer  20 J. 
   Referring to  FIGS. 7A-7F  again, since all the appropriate parts have been described, it is particularly important to notice that the close tolerance between threaded section  20 K and the bore  20 H is required. After having the channels  20 T and the collar  20 W with the conventional O-rings  20 U in place, the cylinder  20 R is inserted into the bore  20 H and fastened with a hexagonal nut  20 L which has the same inside diameter as that of the outside diameter of the extended length  20 D. The O-rings  20 U placed within the channels  20 T act as a sealer between the cylinder  20 R and the bore  20 H, while the O-ring(s)  20 U on the collar  20 W acts as a rotational seal between the base of the nut  20 L and the collar  20 W. After opening the water channel  20 N with the key  20 Y for the orifice  20 V, the control valve  22 A controls the water pressure to the nipple  23 . 
     FIG. 8  shows the orifice valve body  20  without control valve  20 C, although it shows the conduit assembly body  21  in exploded views and also shows the connector body  19  detached from the orifice valve body  20 . A length of inflexible tubing  21 D having two ends comprising a first end and a second end is used, with the first end of the length of inflexible tubing  21 D having a plurality of male threads  21 G, which are connected to the female threaded section  20 E as shown in  FIGS. 7A-7F . The flexible tubing  21 A, which has two ends comprising a first end and a second end, has end the first end slid over the tubing  21 D such that the first end of the flexible tubing  21 A is placed over the first end of the inflexible tubing  21 D. Then, a washer  21 B goes over the tubing  21 D. The hexagonal nut  21 C has an inside diameter the same as that of the outside diameter of the flexible tubing  21 A. The nut  21 C fastens the conduit assembly body  21  to the male threaded end  20 P of the orifice valve body  20 , as shown in  FIGS. 7A-7F . Referring to  FIG. 8  again, a washer  21 E has a hole with a diameter the same as that of the water channel  20 N diameter and an outside diameter the same as that of the inside diameter of the female threaded section  20 K. After inserting the washer  21 E into the female threaded section  20 K, the orifice valve body  20  is connected to the male threaded end  19 B at a 90 degree angle to the x-axis of the connector body  19 . 
     FIGS. 9A-9D  show many views of the hand held cylindrical water pressure control valve  22 A. The control valve  42  has a diameter and also has two ends comprising a first end and a second end, with the first end of the control valve  42  having an orifice  22 C and channels  22 D, with the channels having conventional O-rings  20 U which act as a sealer between control valve  42  and the bore  38  (as shown in  FIGS. 11A-11B ). At least some of the length of the control valve  42  near the first end of the control valve  42  has a diameter very similar to that of bore  38 . The control valve  42  has shoulders  22 E and a collar  22 F, with the collar  22 F having a conventional O-ring  20 U which acts as a rotational seal between the base of a hex nut  22 K and the collar  22 F. The control valve  42  is also connected to attachment  22 G, which is a cylindrical rod having two ends comprising a first end and a second end. The first end of the attachment  22 G is attached to the second end of the control valve  42 . The hex nut  22 K has a bore  22 L the same size as that of the diameter of the extended length  22 G. The attachment  22 G diameter is smaller than that of the control valve  42 . The attachment  22 G has a bore  22 Q, with the bore having a female threaded section  22 Y. The hex nut  22 K is shown having a spring washer  22 M. The female threaded section  22 Y of the bore  22 Q has a machine screw  22 J and also a washer  22 H. 
   The end of the secondary extension  22 X has an ellipsoid shape and it has the same depth as that of the thickness of the directional dial  22 N. The channels  22 D and the collar  22 F which are occupied by conventional O-rings  22 Z can be inserted into the bore  38 , which has a specific diameter, as shown in  FIGS. 11A-11B . The hex nut  22 K with a spring washer  22 M fastens the control valve  22 A with female threaded section  31  to the body  22 , as shown in  FIGS. 11A-11B . The directional dial  22 N has a stopper  22 R placed on the circumference, as shown in  FIGS. 10A-10B . The directional dial  22 N with its ellipsoid-shaped hole  22 WD slides into the secondary extension  22 X of the attachment  22 G of the control valve  22 A. The machine screw  22 J along with the washer  22 H fasten the dial  22 N to the secondary extension  22 X. While tightening hex nut  22 K to the control valve  22 A, care should be taken to see that the orifice  22 C aligns perfectly with the water channel  33  as shown in  FIGS. 11A-11B  and the control valve  22 A rotates freely on the O-ring of the collar  22 F. 
   The constructions and the attachments of the control valve  22 A and the directional dial  22 N to the body  22  are shown in  FIGS. 10A and 10B . In the side view, the body  22  is seen having two stops  22 ST. The relative positions of bores  22 S and  22 SY for the two stops  22 ST are seen in detail in the right hand side view and  22 S,  22 SY are on the straight line  22 W going through the center of the control valve  22 A and approximately at 55 degree angle  22 U with the x-axis of the cylindrical bore  38 , as shown in  FIGS. 11A-11B . The front view shows the vertical axis  22 V going through the center of the water channel  33  and the secondary extension of the cylindrical bore  38 . The stopper  22 R, the off position  22 S, and the on position  22 SY are all drawn on a circle that has approximately twice the diameter of the bore  38  and also where water channel  33  crosses bore  38  as a secondary extension  22 X. The two stops  22 ST are shown in the front sectional view in  FIGS. 10A-10B . The stopper  22 R at the off position of the directional dial  22 N is located on the circumference of the circle, as shown in the front view, and furthermore, the on-position  22 RN is shown in the side view. The directional dial  22 N is permitted to rotate approximately 90 degrees from stop  22 ST to the other stop  22 ST. When the stopper  22 R on the directional dial  22 N is placed against one of the stops  22 ST, the orifice on the control valve will be parallel to the water channel located within the hand-held unit (thereby allowing complete water flow within the water channel within the hand-held unit), while when the stopper  22 R on the directional dial  22 N is placed against the other stop  22 ST, the orifice on the control valve will be perpendicular to the water channel located within the hand-held unit (thereby completely preventing water flow within the water channel within the hand-held unit). Obviously, there are an infinite number of positions in between these two endpoints. 
     FIGS. 11A-11B  show the body  22  with the nipple  23 . In order to have a general perception of the invention, two important views are shown here. The body  22  has a lower section  34 B and that section has a chamfer  34 A, beads or small ball-shaped body or projecting rims bands  36 , a bead gap  34  and a neck  37 . The tubing  21 A of the conduit assembly body  21  slides over the section  34 B up to the neck  37 . A pressure clamp over the gap  34  may be necessary to have a tight connection. In the front view of the body  22 , it shows the water channel  33  runs end to end within the body  22  and intersects with the bore  38 . In the side view of the body  22 , the bore  38  has a space between the body  22  and the chamfer  38 S of the bore. The bore  38  has a female threaded section  31 , with an approximate depth for the hex nut  22 K. The plane surfacing  32  allows for surface-to-surface sealing of the hex nut  22 K. The upper section of the body  22  has a neck  30 , with the neck  30  having an upper neck section  22 B. The end of the upper neck section  22 B has a collar  39  on which the nipple body  23 A rotates at 360 degrees. The upper neck section  22 B had channels  28 , with the channels having conventional O-rings. The channels also are located adjacent to shoulders  27 ,  29  and  41 , with shoulder  27  having chamfer  26 . Referring to  FIGS. 11A-11B  again, the right-hand side view shows female threaded locations  22 S and  22 SY for the stop studs  22 ST. Upper section  44 , attached to collar  39 , has an attachable nipple body  23 A which rotates 360 degrees on the collar  39 . The nipple body  23 A includes a nipple  23  with a slit  23 M powered by the water energy from the domestic water supply line, which is preferably approximately 20 psi. However, the speed and pressure of the water exiting the slit  23 M can be controlled by the control valve  22 A of the body  22 . 
   Referring now specifically to  FIGS. 11A-12C , the separate nipple bodies  23 A can be inserted or attached to the upper section  44  for each person within a particular group or family. The nipple has a razor sharp slit  23 M with the slit  23 M being connected to the internal water channel  23 C. The slit has an angle  23 E of approximately 70 degrees with the x- and y-coordinates of the slit  23 M. The extended section  23 N of the small cylindrical tubing of the nipple  23  is to be inserted into the hand-held cylindrical control device section  44  through the water channel  33  until the nipple body  23 A rotates on the collar  39  as shown in  FIGS. 11A-11B . Two conventional O-rings located within the channels  28  seal the hollow housing  23 K and at the same time allow the nipple body  23 A on the collar  39  to freely rotate on a 360-degree axis. The nipple body  23 A has a neck  23 F, a chamfer  23 L and a vertical axis  23 H. 
   After completing the connections and the attachments of all described parts herein and mentioned in  FIGS. 1 through 12C , the dental hygiene pulsatory slit apparatus is ready for the dental hygiene use for the entire family. 
   As previously stated, an important part of the invented device is that it can be connected to a valve or valves of the water supply lines under a sink in the bathroom. It is simple when the sink is having no enclosures, because the water carrying flexible tubing  21 A can go around the sink. When the sink is enclosed with a cabinet or has a marble top over the sink, the flexible tubing can be threaded through a small bore of the enclosed cabinet or of the marble top of the sink. The bore has to be made particularly for the use of the invented dental hygiene device. For the life long use of the device, it is a very small price to pay. When building a new home or remodeling a bathroom, it is easy to install this device permanently for the benefits of the oral health of the entire family. 
   With respect to the above description then, it is to be realized that the optimum dimensional relationships for the parts of the invention, to include variations in size, materials, shape, form, function and manner of operation, assembly and use, are deemed readily apparent and obvious to one skilled in the art, and all equivalent relationships to those illustrated in the drawings and described in the specification are intended to be encompassed by the present invention. 
   Therefore, the foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention.