US2532054A - Air and water spray for dental engines - Google Patents

Description

Nov. 28, 1950 R. J. BROUSSARD ETAL 2,532,054

AIR AND WATER SPRAY FOR DENTAL ENGINES Filed April 30, 1948 2 Sheets-Sheet 1 /99 Fig. 5

Inventors Rene J. Broussard Joseph 6. Til/y N 8, 1950 R. J. BROUSSARD ETAL 2,532,054

AIR AND WATER SPRAY OR DENTAL ENGINES 2 Sheets-Sheet 2 Filed April 30, 1948 Inventors Rene J. Broussard Joseph 6. Til/y E] @6? MW Attorneys Patented Nov. 28, 1950 UNITED STATES ATENT OFFICE AIR AND WATER SPRAY FOR DENTAL ENGINES Application April 30, 1948, Serial No. 24,335

4 Claims. I This invention appertains to novel and useful improvements in attachments for use in association with dental equipment.

. An object of this invention is to spray selec tively air and air mixed with liquid to a zone adjacent a drill or other dental apparatus.

Another object of this invention is to provide improved means for carrying out the above mentioned functions, which improved means includes solenoid actuated valves to be electrically connected with a circuit, forming a portion thereof, which includes the motor for driving or actuating the conventional dental apparatus.

A still further object of this invention is to selectively control the flow of fluid, whether it be air solely or air and liquid, by a manually operative valve which is conveniently located and accessible.

' Another object of this invention is to provide a simplified device of the character to be described which lends itself well to commercial manufacture and which is efiicient in operation.

Ancillary objects and features of novelty will become apparent to those skilled in the art, in following the description of the preferred form of the invention, illustrated in the accompanying drawings, wherein:

Figure 1 is an elevational view of a portion of the invention, showing portions schematically and showing the invention applied thereto;

Figure 2 is a sectional View of certain details of construction;

Figure 3 is a plan view of the invention shown in Figure 2, showing only the valve and liquid container construction;

Figure 4 is an elevational view of a portion of a dental apparatus utilized in association with the invention;

Figure 5 is an elevational view showing another type of dental apparatus whereon the invention is applied;

Figure 6 is a sectional view of the manually operative valve structure forming a portion of the invention, and;

Figure 7 is a sectional view of the valve illustrated in Figure 6, showing the core in a different position.

I This invention has been provided in order to supply dental apparatus such as that used in drilling, cleaning, buffing or sanding teeth, with an attachment whereby a fluid may be supplied adjacent the cutting portion of the tool. This fluid may be air only or a mixture of air and liquid as desired.

The attachment is interwoven with the consaid Lelia Gonsoulin ventional apparatus in such a manner as to be rendered operative when the drill and the like are operative. A conventional switch is utilized for such a purpose,

A solenoid actuated valve structure is supplied in a suitable support in order to control the flow of fluid to a receptacle or fluid container. A specially provided valve is associated with the container in order to direct the fluid to the discharge nozzle or direct the fluid first in asso ciation with the interior of the liquid container and then to the discharge nozzle. By such means the issuing fluid is of the selectivity described hereinbefore.

Referring now to Figure 1 it will be seen that a conventional apparatus is illustrated including a housing Ill having a motor l2 therein in order to drive a flexible shaft l4. This flexible shaft extends through a conventional linkage [6 which supports a head l8. This head [8 has a tool 20 attached thereto with a grinding disk 22 rigidly secured thereto. As is conventional in the apparatus a second type of head generally indicated at 24 may be supplied in lieu of the head l8 and a drill 26 may extend from this head. The usual attachment means generally indicated at 28 is supplied on each of the heads in order to detachably engage with a complemental attaching means in the linkage construction l6. This portion of the illustration is entirely conventional.

Referring now to Figure 2 it will be seen that a support generally indicated at 30 is supplied with a valve body member 32 therein. This valve body member includes a pair of valve chambers 34 and 36 respectively, the last mentioned chamber having a conduit 38 in communication therewith. This conduit also communicates with a suitable air supply providing means which is known in the dental art and trade.

A conventional solenoid coil 39 is supplied within a'small housing 40. This small housing 40 has a sleeve 42 positioned therein and a bonnet 44 thereover. The bonnet 44 has a cover 45 attached thereto through the medium of a conventional screw 48 or the like and this cover seats on a sleeve type bearing member 50 which in turn seats upon a nipple 52. The said nipple is supplied witha reduced threaded terminal portion which is received in the valve body mem.

ber 32. A conventional gasket or packing member 5t is interposed between a shoulder formed on the said nipple 52, and on a peripheral flange 58 of the said valve body member 32.

A solenoid core or armature 60 is reciprocably 3 received within the sleeve 42, being actuated in a conventional manner by means of the solenoid coil 39. Of course, electrical conductors 64 and 66 extend from the solenoid field coil and project through a suitable socket 68.

Referring now to Figure 1 it will be seen that. the conductor 64 leads to the dental motor I2 and a terminal 199 of a foot actuated switch to be described subsequently. The terminal 56 is fed through this switch at the pole 12 to the dental motor I2 and to be employed by means of the plug I90 (also to be described'subsequently) The switch is to selectively use. the motor in a conventional manner or with the invention, as desired.

The support '39 has an opposed solenoid field coil I6 seated in a suitable bushing I8. An outer case or cover 89 encircles the field coil 5 5 and is attached to the support 39 by any suitable means. A sleeve 82 may be positioned within the housing 78' and also within the field coil [5. The usual armature or core at is reciprocably received in the sleeve 82, extending between an. internally turned flange 85 of the cover 881- A partition 8-8 is provided in. the valve body portion 321 thus defining the said chambers 35' and 36. This partition has an aperture thereinwith a plug Sfi'fitted in the said aperture. A passage s2 is formed centrally of the saidplug 9% and. seats a valve head 94 therein. The valve head. has a valve stem 96- secured thereto, which. stem is adapted to be engaged by the core 6%. Also, if. it is found desirable the core '59 andvalvestem 98 may be formed integral.

The said: bushing or nipple 52 has an enlarged chamber II'IB' at one end thereof wherein a ring or washer M32 is seated. This ring has a central aperture in order to receive the core 9&- therethrough. Also, suitable resilient biasing means such as the spring I04 is seated on the head 94 and reacts on. the washer or ring Hi2 thereby resiliently biasing the valve head 94 into engagement with the passage 92. It isnow readily appreciated that upon actuation of the solenoid under discussion the valve head 94 will be urged from engagement with the passage 92 thereby permitting air to pass through the chamber 38 and into the chamber 34. The said chamber 3% is supplied with a tube H9 having a flexible con.- duit H2 detachably'securedthereto. This flexible conduit H2 terminates in attachment with a sleeve H t which is securedto a. valve structure generally indicated at II-B. It is apparent that the valve head and its appurtenant mechanism is used for selectively controlling. the flow of air to the valve structure I it.

An additional valve assembly generally indicated at I28 is supplied in communication with the chamber 34. This valve structure includes a valve body I22 having a central bore 24 and a poppet type valve I25 reciprocably mounted therein. This poppet valve type. is actuated by the solenoid armature 84 through the medium. of operative engagement therewith. Gravity pulls the valve $24 to the seated or closed position when the solenoid associated with the armature 83 is inoperative. As is seen in Figure 1 the conductors I28 and I33 respectively terminate in a contact I32 of the switch, which may be of the foot actuated type, and in the line 66. Thus, the

lower valve assembly I20 is rendered operative and inoperative upon selective manipulation of the switch arm I36.

The valve assembly MI]. has a T-shaped passage M2 therein. By manual operation of the arm I46 of the valve structure II6 the air issuing through the conduit II2 may be selectively directed immediately through, a conduit M3. or through a liquid receptacle I50 first and then through the conduit I48.

The container or receptacle I50 is substantially conventional having a conventional fitting or coll'ar IE2 at the top portion thereof. A pressure dome I56 has a threaded collar associated therewith with which is received in the collar I 52. A small partition I5! is in the dome I56 and has an orifice I6Iltherein. This orifice communicates the pressure dome I56 with the interior of the liquid receptacle. A sleeve I 62 extends through the partition and has a pipe I64 projecting through the central portion o bore thereof. Of course the pipe I 64 also projects through the partition, the pipe and sleeve terminating adjacent a reduced portion I66 of the pressure dome.

When. the valve structure H6 is. set. as in Figure 6 the compressed air is received in the; pressure dome and applies the pressure. to the. upper surface of the liquid therein. This forcesJa small amount of liquid through: the pipe I64; and an amount of air through the sleeve I'62 thereby partially atomizing the same. The amount of air pressure on the upper surface of the liquid within the container I59 is regulated by means of the calibrated orifice I60. Of course, someiof the air which is refused entry into the container use by means of the orifice I66 extends directly through the conduit I i-8. By this means a mixture of air and liquid issues.

When the valve structure, is set as is seen in.

Figure '7 the air takes the course of least reslstance which is substantially entirely directly through the conduit I48. This causes the flow through the conduit I48 to be substantially entirely air.

Referring now to Figures 4 and 5 it-will be-seenthat a nozzle structure including a tube: I19 with a discharge opening at one end thereof issupplied. This maybe attached to the conventional.

head 24 by any suitable means such as by solderingo-r any other firm attaching means. It is seen that the discharge portion of the tube I10 projectsa spray-on the tool 26.. Further; the end of the tube or body member I19 may have en largements I16 at. one end thereof in order toquickly and firmly attach theconduit. I 48 thereto. In Figure 4 it will be seen that a second type of discharge nozzle is supplied. Here, the shank I'hi has a pair of bands I89 and I82 respectively attached thereto which firmly embrace the head IS. The discharge orifice I86 atv the terminal portion of the element I78 projects a spray adjacent and on the grinding element 22.. The bands ice and I-82 may be welded, brazed or soldered for firm gripping as found desirable. These bands may also be attached. by means of rivets, screws or other fastening means in. this general. class,

In actuation of the invention the outlet plug Ice is received in any suitable source of current and directs the current through the lines I92 and.

i9 3 respectively to the motor I2 and to the contact. 72. of. the switch. The conductor I96 extending fromthe. plug I99 terminates inthe foot actuated. switch structure.

In operation of the invention it is readily appreciated from an inspection of Figure 1 that upon utility of the. solenoid for actuation of the valve head 94 the lower solenoid. is inoperative.

5 Thus, the poppet valve I25 closes the passagein which it operates. Thus, compressed air is permitted to flow directly into the receptacle I50 or through the conduit M8 as described. However, under certain conditions of operation there will be a residual pressure within the receptacle I50. Therefore, upon manipulation of the switch structure the lower solenoid is actuated thereby lifting the poppet valve slightly. The core 84 of the solenoid is limited in its travel through the medium of the said flange 86 and by engagement with an arm of the support 30. Thus, in order to relieve this back pressure the lower solenoid raises the poppet valve I24 a predetermined amount. This permits the issuing air and liquid to be stopped substantially immediately upon the desire of the operator of the invention.

From the foregoing a clear understanding of the operation of the invention is deemed appar ent. However, it is apparent that variations may be made without departing from the spirit thereof.

Having described the claimed as new is:

1. In dental apparatus including a head having a tool associated therewith, a spray nozzle attached to said head, a receptacle for retaining liquid, means for applying air pressure within said receptacle, means for by-passing the air, and means for conducting the by-passed air and the air from the receptacle to said nozzle, a solenoid actuated valve associated with said air conducting means to relieve residual pressure from said receptacle, and means for controlling the actuation of said solenoid.

2. In a dental apparatus which includes a manually operative tool with a spray nozzle secured to said tool and a motor for operating said tool, a valve body member having a pair of valves disposed therein, a solenoid for operating each of said valves, and an air inlet conduit secured to said valve body member and one of said valves controlling the passage of air through said body invention, what is member, the other valve relieving residual pressure in said valve body member when operated by the solenoid which is operatively connected therewith, and means for conducting air from said valve body member to said spray nozzle.

3. In a dental apparatus which includes a manually operative tool with a spray nozzle secured to said tool and a motor for operating said tool, a valve body member having a pair of valves disposed therein, a solenoid for operating each of said valves, and an air inlet conduit secured to said valve body member and one of said valves controlling the passage of air through said body member, the other valve relieving residual pressurein said valve body member when operated by the solenoidwhich is operatively connected therewith, a conduit secured to said valve body member, a receptacle having said conduit connected therewith so that air from the valve body member is introduced into the receptacle, a line extending from said receptacle to said spray nozzle and a bypass valve operatively connected therewith so as to conduct compressed air selectively through said receptacle and into said nozzle and directly from the conduit to the nozzle.

4. The combination of claim 3 and a pressure dome attached to said receptacle with an atomizing device disposed therein for liquid in the receptacle.

RENE J. BROUSSARD. JOSEPH G. TILLY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 727 ,736 Basford May 12, 1903 2,245,036 Henschel June 10, 1941 2,420,338 Page May 13, 1947

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