Abstract: A dental instrument having an active tool for treating a hard dental substance includes an arrangement for spraying water to cool the preparation location with the water either forming an envelope surrounding the tool or being a finely atomized stream of a solid angle directed onto the preparation location. The volume proportion of cooling air relative to the volume of the water in both versions is not greater than the volume of the water so that the envelope or spray are substantially free of air.

Abstract: An aspirating dental hand piece having at its distal end a vacuum scoop that circumscribes the work tool and automatically carries away cooling water and debris during operation of the hand piece. The hand piece includes a two-part handle. The distal portion of the handle terminates in a suction scoop or shroud within which the gas driven motor is housed. This portion of the handle is divided into two portions, one of which houses the cooling fluid, gas and fiber optic conduits, and the other of which forms a fluid passageway in communication with the suction scoop for carrying away the cooling fluid and the debris generated during the drilling and grinding operations. The fluid and debris passageway is sealed with respect to the conduit carrying portion of the handle.

Abstract: A medical treatment device, in particular for surgical purposes, consisting of a treatment instrument in the form of a handpiece which is connected to a control unit through a supply line. Operatively associated therewith, and preferably with the control unit, is a media source which supplies cooling fluid and to which the supply line is connected with a flexible line extending either thereon or within. Associated therewith is a rinsing device possessing a rinsing agent source and a collecting container, which device can be selectively connected to the flexible line. Also disclosed is a method for cleaning the flexible line.

Abstract: A medical treatment device, in particular for surgical purposes, having at least one treatment instrument in the form of a hand piece which can be connected to a control unit by means of a flexible supply line, there being associated with the treatment device, preferably with the control unit, a source of treatment agent, in particular for cooling fluid, to which it is possible to connect a treatment agent line, which extends at least in part through the supply line to the front end of the hand piece, in the form of a hose, the treatment agent line having a hose section which extends with radial play for movement in the supply line as far as the hand piece and is there connected to a plug-in spigot which is plugged in a releasable manner in an axial plug-in socket in the hand piece and has an axial and a radial channel section, of which the axial channel section issues from the hose connection and the radial channel section is connected to the continuing treatment agent line.

Abstract: A water supply device for dental apparatuses which is provided with an arrangement to prevent backflow of contaminated water from any one of the dental apparatuses into the fresh water supply is characterized by providing a separate container for receiving water from the water system and a pump for pumping water from the container through lines to each of the discharge locations for the dental apparatus. In one embodiment, the pump is driven by an electrical motor and in another embodiment the pump is formed by two air-actuated piston pumps that work asynchronously. The arrangement can include a second container for disinfectant, which is discharged into the first container as fluid is added to the first container.

Abstract: A dental handpiece provided with a handle and a head on one end thereof in which a turbine rotates at high speeds and accommodates a cutting bur having an axial through opening to direct a preferably hygienic coolant directly through the cutting end of the bur, while the opposite end of the bur, on the interior of the head, is highly polished and absolutely flat for rotating engagement with one surface of a rotary liquid seal including a seal member of very hard substance in combination with a pliable compressible member engaging the opposite surface of the seal member, the combination being housed within a recess extending upwardly in a push button on the head or other finger-operated bur release mechanism on the head and having coaxial fluid openings communicating axially with the through opening in the bur and fluid passage in the push button leading from a fluid supply conduit in the handle.

Abstract: A dental cleaning nozzle has a brush element combined with a water jet. The jet is directed to provide interaction with the brush element with a part of the jet bypassing the end of the brush element. The arrangement enhances plaque removal.

Abstract: A coolant delivery system for a high speed dental cutting handpiece. The system includes a coolant reservoir, a selectively operable pressurized gas source, and a pressurized-gas distribution structure. The distribution structure has a gas entry chamber, a first passage having a reduced cross-section dimension leading from the entry chamber to the reservoir, a second passage leading from the reservoir to the entry chamber, and a third passage leading from the entry chamber to the exterior. Within the entry chamber is disposed a closure member, preferably a flexible membrane, which is situated to close the second and third passages when pressurized gas, en route from the gas source to the first passage for pressurization of the reservoir and ultimate coolant delivery to the handpiece, strikes the closure member.

Abstract: A cartridge type dental handpiece contains a handpiece main body, a head housing provided at a distal end of the handpiece main body, and a cartridge detachably adapted within the head housing. The cartridge has a cartridge casing and a rotatable sleeve rotatably mounted within the cartridge casing and adapted for detachably holding a dental burr. The dental handpiece further contains a fluid passage defined between an inner surface of the head housing and an outer surface of the cartridge casing when the cartridge is mounted within the head housing, a fluid spraying port formed in a lower surface of the cartridge casing in communication with the fluid passage for spraying the fluid from the fluid passage onto a tooth being treated, and a communication port for supplying the fluid from a fluid supply duct within the handpiece main body into the fluid supply passage.

Abstract: A system for purifying water supplied to a dynamic dental instrument has a disposable element having an iodinated resin containing a polyiodide, I.sub.5. Disease causing microorganisms in water flowing through the element are neutralized with neutralizing agents released directly into the microorganisms when the microorganisms come into contact with the resin. Residual iodine is released as water passes through the resin and remains between the element and the dynamic instrument to maintain dental unit water purity.

Abstract: A typical turbine handpiece comprises a housing accommodating the air-driven rotor, and in the head disclosed, the base of this housing is extended to create an annular seating connected at bottom with the water line of the spray circuit and occupied by a first ring exhibiting an annular cavity connected by way of a lateral orifice to the spray air line. A portion of the ring not occupied by the cavity is shaped so as to fill the annular seating only in part, thereby creating a gap admitting water from the spray circuit; the ring also affords a set of through holes connecting the cavity both with the gap and with a corresponding set of angled outlet holes in the bottom part of the head, from which sprays are directed convergently onto the tip of the bur. The seating and the cavity are enclosed by a second ring inserted from the turbine side to a fluid-tight fit.

Abstract: Apparatus for disinfecting water to make it virtually microbe-free and maintaining it in a continuous microbe-free condition for use at a center for dental instruments and the other apparatus by ozonized water. Water is ozonized and provided on both the dentist's side and dental assistant's side of a dental unit which includes a variety of dental instruments such as drills, syringes and an expectoration bowl. At least one water reservoir is connected through fluid conduits with such instruments. An ozone producing device is connected with the water reservoir and the ozone level in the fluid conduits between the water reservoir and the instrument center and apparatuses is controlled so that the ozone level at the water discharge openings at the dental instruments and other apparatus is zero or substantially zero.

Abstract: An apparatus allowing the provision of light and/or water at the tip of a dental illumination light curing device normally provided without such capability includes a pair of supply lines terminating at their remote end in an adapter capable of connection to a standard air/water connection as found on a dental pedestal. The local ends of the supply lines terminate at the neck of the illuminator, where they are supported upon the neck by a clamp, and interconnect with a pair of nozzle tubes. The nozzle tubes have exits at the illuminator tip, and are secured thereto in a removable manner. The modular nature of the apparatus allows removal and exchange of the nozzle elements as desired to accommodate differing illuminator neck shapes and lengths and permit sterilization and replacement of the nozzle elements.

Abstract: An air-turbine type dental handpiece in which the handle has separate passages for air and water under pressure respectively to drive the turbine to rotate a bur and furnish cooling water to the bur which has an axial passage entirely therethrough to direct the cooling water where the cutting end of the bur contacts tooth material for producing a dental preparation to receive filling material and the like. The head of the handpiece has a chamber within which the turbine and bearings are mounted and also includes a rotary coupling to direct cooling water to the inner end of the axial passage of said bur and prevents escape of the cooling water to the interior of the chamber for the turbine and bearings. The coupling is bipartite and one of the parts comprises the innermost end of the bur when mounted within the shaft of the turbine.

Abstract: The device comprises a tool 21 with a cutting part 23 and a shaft 25. The shaft 25 is provided with an annular catch groove 25d and carries a sleeve 31 which encloses it and comprises a catch projection 31c which engages in the catch groove 25d so as to be detachable, wherein the shaft 25 and the sleeve 31 are rotatable relative to one another. The sleeve 31 is provided with a coolant inlet 31d which opens into an annular duct 41 enclosing the shaft 25 and communicating with a passage 43. This duct 41 is connected with the passage 43 for guiding a coolant, which passage 43 extends through the tool 21 until its cutting part 23 and opens into the surroundings at the free end of the cutting part 23 or in the vicinity of the latter. The sleeve 31 can be secured against axial displacements by means of a catch projection 31c, which is engaged in a catch groove 25d, without separate connection parts and without taking up much axial space.

Abstract: Atomizing process and device for dentistry handpieces or angle pieces, characterized in that it involves generating, in the region of the receptacle of the tool in the handpiece or angle piece, a suction effect putting the vicinity of the cutter receptacle under a slight vacuum under the effect of an air cone of which the apex is situated at the point where the tool is working, the other function of this air cone being to direct the cooling fluid by means of an effect of the COANDA type, thereby reducing the consequences of turbulences attributable to the rotation of the tool or instrument.

Abstract: A dental handpiece includes an arm, and a hollow head formed on a distal end of the arm. The head has a nozzle projecting from an inner surface thereof. Cooling water, fed via a main coolant passageway of the arm, is injected from the nozzle. A generally cylindrical holder for supporting a dental burr is rotatably supported within the head. The cooling water injected from the nozzle passes through an auxiliary coolant passageway, formed axially through the dental burr, and is injected from a grinding portion of the dental burr. The dental handpiece also includes a pump mechanism for feeding the cooling water. Injected from the nozzle, into the auxiliary coolant passageway of the dental burr. The pump mechanism includes a screw mounted on the outer periphery of the nozzle, and a pump housing which is mounted on one end portion of the holder disposed close to the nozzle and surrounds the screw.

Abstract: A dental handpiece for rotating a dental cleaning tool includes a casing in which there is mounted a drive shaft that is operably connected to the cleaning tool. A rotor is affixed to the drive shaft and is driven by compressed air fed to the casing. The drive shaft is hollow and communicates with a reservoir situated within the casing. The reservoir contains a refillable supply of dental paste. Pressurized air is fed to the reservoir to push paste through the hollow drive shaft and into the dental cleaning tool. The interior of the drive shaft includes a helical screw which aids in feeding the paste toward the cleaning tool.

Abstract: Dental apparatus includes a tank of compressed sterile oxygen, or another compressed gas such as nitrogen, a source of a pressurized treatment liquid, and valves for coupling the oxygen tank or treatment liquid to the water inlet of the dental unit enabling the dental unit to be used for a wide variety of dental treatments, particularly when using a triple syringe for rinsing the canals in root canal treatment, or when using an ultrasonic scaler for dislodging hard deposits and stain.

Abstract: A periodontal implement in form of a scaler or curette having at least one blade mounted to one end thereof in which the body of the implement includes at least one fluid passageway through which a source of medicinal fluid supply including germicidals, anesthetics, soothing agents hemostatics and the like are released to the area of the blade during patient treatment by controlled flow such as by metering or capillary action.

Abstract: An extruded conduit structure for conveying several different fluids is provided comprising a cluster of at least three tubes connected by webs extending between adjacent pairs, the tubes and webs being formed by simultaneous extrusion of a suitable plastic through a suitable die. The outer surface of each of the webs is convexly curved in an arc that is substantially tangential with the outer surfaces of the adjacent pair of tubes. The inner surface of each of the webs is flat relative to the outer surface and forms a cord of such arc whereby each of the webs will be of minimum thickness along each of its junctures with the adjacent webs.

Abstract: A gas driven medical or dental handpiece assembly of the type having a turbine driven dental tool. A sterile coolant supply is usable with the handpiece to provide liquid fluid under pressure to irriagate the patient site and cool the dental tool. The coolant fluid is derived from a cartridge connected to the handpiece. The cartridge is replaced for each patient. The cartridge is divided by a flexible diaphragm into a propellant chamber and a liquid chamber. Initially the liquid chamber is full and the propellant chamber is empty with virtually a volume of zero. A propellant gas under pressure is introduced into the propellant chamber of the cartridge to displace the diaphragm and move the liquid through a fluid conduit to the tip of the handpiece. The propellant is derived from a portion of the compressed gas used to drive the turbine. Another portion of the compressed gas is diverted to a chip air conduit of the handpiece.

Abstract: Apparatus for the delivery of light-curable composite dental filling material comprises a tubular composite reservoir, plunger and slider. The slider is free to move longitudinally along the reservoir but is matingly mounted to facets on the outside surface of the reservoir to prevent angular movement of the slider relative to the reservoir. The plunger consists of a shaft threaded to mate with the threaded inside diameter of the composite reservoir. The plunger also has a disk integrally formed to end of the shaft at one end and a male front piece at the other. The male front piece mates with a female fitting of a separate composite extrusion element.

Abstract: A power unit, in particular for dental instruments, comprises a housing (2) which, at one end, has means for supplying electric current and at least one fluid, and, at the other end, has a connector branch or stub for removably mounting a tool unit thereon. The connector stub includes an interior partition wall (18) which defines flow passages for transfer of fluid through the connector stub. This partition wall is in electrically conducting connection (28) with the current supply means, and the partition wall (18) is electrically insulated or separated from the remaining walls of the connector stub. The partition wall (18) has a contact face (19) which is accessible from the exterior of the stub.A tool unit includes a coupling socket with an interior wall (30) for insertion on the connector stub. A contact (38) is mounted in the interior wall (30) and is adapted to provide connection with the contact face (19), when the tool unit is in place on the connector stub.

Abstract: A dental handpiece assembly comprising a handgrip and a detachable headpiece. The front end of the handgrip includes an arm that extends forward and below the headpiece. The headpiece carries a dental tool and the handgrip supplies cooling water and air through the extended arm to outlets close to the tool. This arrangement has the advantage that the detachable headpiece does nto need to include passageways for the cooling water and cooling air.

Abstract: A dental handpiece with a built-in electric motor for the drive of a dental treating implement which is arranged at one end of the handpiece. The implement is suppliable with a cooling medium through a cooling medium conduit in the handpiece; whereby the handpiece is detachably connectable with a current provider at its end which is distant from the implement, in which the current provider possesses electrical current supply contacts which are supplied with electrical current and which, upon the connection of the current provider with the handpiece, come into contact with current commutator or receiving contacts of the electric motor.

Abstract: An elongated dental handpiece with an air turbine at one end and a supply hose at the other end has two disconnectable casings coupled to swivel about its longitudinal axis. The various supplies for the turbine, including turbine drive air, chip air, water and light, extend through the swivel. Exhaust air from the turbine is carried through all of one casing and is released to the atmosphere in the area where the casings can be disconnected.

Abstract: An instrument for the treatment of interdental surfaces is disclosed. The instrument is adapted for attachment to a bored, reciprocable holder of a driven dental tool which includes a fluid supply conduit in communication with the tool holder. The dental instrument has a flexible blade (3) having at least one diamond abrasive surface (4) bonded thereto. The instrument also has a pair of mutually opposed, bowed ears (2a) attached to the blade adapted for biased insertion into the bored holder so as to secure retention within the holder. The pair of mutually opposed bowed ears also defines a channel therebetween for fluid communication from the holder fluid supply conduit to the abrasive surface.

Abstract: A dental rotary cutting instrument is provided, which is adapted to be driven by a dental handpiece and to cut slots for receiving implants into a jaw. The instrument includes a sawblade, which has a periphery and is provided at the periphery with sawteeth and is formed with a plurality of angularly spaced apart, radial passages, which open at said periphery. Driving and coolant supply means are adapted to be connected to a dental handpiece and to transmit torque from the handpiece to the sawblade to rotate the latter and are adapted to supply a coolant from the handpiece to each of the radial passages at a point which is radially inwardly spaced from the periphery.

Abstract: The following specification discloses an oral hygienic spraying device. The oral hygienic spraying device comprises a material that can be used for oral hygiene disposed within a pump container or pressurized metal bottle having a spring actuated valve that allows for release of the pressurized hygienic material in the form of a spray or mist. The spray or mist is released when the pump or valve is depressed, through a scrubbing cup. The scrubbing cup has a plurality of radially disposed members within the cup for purposes of abrading and scrubbing residue such as plaque, food materials, and the foreign substances from the teeth and gums of a user. The scrubbing cup can be formed as part of the top or head of the oral spraying device so that it sits over the exit from the valve, or it can be separately attached to a valve connection fixture.

Abstract: A dental handpiece including a powerhead assembly connected to an outer sleeve handle portion in which is located a sleeve bearing, a rotatable, disconnectable connecting means being provided in the sleeve bearing. A first optical fiberscope extends from the front end portion of the powerhead near the dental tool into the front end of the sleeve bearing adjacent to the front end of the connecting means. A thickened fiberscope abuts the rear end of the first fiberscope and extends rearward through the handpiece to a light source. Cavities, passages and pipes are provided in the sleeve bearing and connecting means in order to provide a smooth flow of compressed air, chip air, water and exhaust to or from the powerhead assembly while permitting the sleeve bearing and connecting means to rotate relative to each other about the longitudinal axis of the handpiece.

Abstract: In dental instruments such as a dental handpiece and a syringe, a coupling device for detachably connecting a hose portion, which supplies air or liquid to these instruments, to an instrument body. The coupling device comprises a sleeve fitted over the hose portion with a clearance formed therebetween, a ball-like stop member inserted into at least one opening formed in a peripheral surface at the front end of the sleeve and movable in a diametral direction of the sleeve, a connection cylinder having one end coaxially mounted on the rear end of the instrument body and inserted into the sleeve, and an operating ring fitted over the sleeve and movable in an axial direction of the sleeve.

Abstract: The following disclosure discloses a pressurized irrigating oral scrubber for the removal of bacterial plaque and deleterious residue and food particles on a user's teeth. The irrigator incorporates a pressurized source of fluid, such as a liquid in the form of tap water or a solution of water and oral hygienic material. The source of fluid can be provided by fluid under pressure that has been reduced, such as from a tap, or a pumping unit which pressurizes the fluid for irrigation purposes. The fluid which is pressurized is delivered through a nozzle or opening to the areas to be irrigated in adjacent relationship to a concave scrubbing cup. The scrubbing cup has a concave or depressed area therein with a relieved surface within the cup in the form of ribs or protuberances to allow for a scrubbing function of the teeth in the area between the gums and the teeth as well as the teeth, while at the same time irrigating and rinsing the residue as it is scrubbed and removed by the scrubbing cup.

Abstract: A dental handpiece which has a drive transmission for transmitting the rotation from a motor to a socket receiving a tool for rotation in the head of the handpiece and having at least one cooling agent line formed in sections with two of the sections being connected to one another by a rotatable connection characterized by a first drive shaft having a direct coupling with the drive shaft of the drive part at one end and having two coaxially arranged gears of different number of teeth disposed on the other end, a first sleeve supporting the first drive shaft and having each cooling line section terminating in an annular groove forming part of the rotatable connection, a second sleeve telescopically received on the first sleeve and having each cooling line section starting with a radially extending port for communicating with an annular groove, a first releasable connection between the first sleeve and the housing of the drive part which does not allow any rotation therebetween, a second releasable connection b

Abstract: An air driven dental handpiece is disclosed for rotating a bur in an angled housing that utilizes an arrangement of cooling water, chip air, and light services which are configured at their terminus into a form resembling a human eye. These services are integrated into an oval shape which is totally contained within the handle structure of the handpiece, and exit from the handle immediately adjacent the housing.In the handpiece, light is transmitted by optic fibers that are enclosed within a rigid, metallic sheath. Light is provided by a flexible fiber optic which abuts the entrance face of the handpiece sheath in a readily detachable, threaded coupling. A spring in the coupling presses the cable fibers firmly against the sheath fibers for maximum light transmission, and also holds the cable securely in the coupling.A flexible, multi-cavity supply hose includes four cavities which provide the five services of turbine air, turbine exhaust, water, chip air, and light.

Abstract: A dental handpiece having an improved water/air spray system including a pair of substantially parallel tubes, one for water and the other for chip air, extending through the handle of the handpiece and terminating in a nozzle chamber having a discharge orifice. The tubes are generally cylindrical but are partially deformed at their distal ends, such deformation constituting a flattening of adjacent wall portions of the respective tubes. Such adjacent wall portions are disposed in contiguous relation and are cut away for a limited distance at the discharge end of the tube assembly to define the unitary nozzle chamber. The wall of the chamber is provided with a water-deflecting surface aligned with the water passage and sloping inwardly and distally toward the orifice to deflect water from the water passage into the path of air discharged from the chip air passage immediately prior to the discharge of said water/air spray from the nozzle chamber.

Abstract: A dental handpiece having an improved water/air spray system including a pair of substantially parallel tubes, one for water and the other for chip air, extending through the handle of the handpiece and terminating in a nozzle chamber of oval cross section. The tubes are generally cylindrical but are partially deformed at their distal ends, such deformation constituting a flattening of adjacent wall portions of the respective tubes. Such adjacent wall portions are disposed in contiguous relation and are cut away for a limited distance at the discharge end of the tube assembly to define the unitary nozzle chamber. The chamber has an oval discharge orifice for directing an elliptical spray pattern towards the tip of the dental bur. At the opposite end of the handpiece, the handle is equipped with a plug terminating in an external end face. Tubular extensions project from that end face for conveying air to the drive air and chip air passages.

Abstract: A dental handpiece comprising a drive section with a drive shaft for driving a tool receiving socket mounted for rotation in an end of a handle section which handle section is coupled for relative rotation on the drive section, said dental handpiece having at least one cooling medium line being formed by a line segment arranged in each of said sections for conveying the medium to a nozzle adjacent the socket, and a rotatable coupling for the cooling medium lines characterized by the rotatable coupling being formed by a first and second sleeves being telescopically assembled together for relative rotation, one of said sleeves having an annular groove for each of the cooling medium lines and the other of the two sleeves having a radial opening in communication with each of the annular channels, said sleeves being detachably connected to the respective section to rotate therewith.

Abstract: An air driven dental handpiece having an air turbine at one end thereof. Collet means for securing a dental bur therein are positioned within the air turbine. The air turbine is mounted in ball bearings, which are in turn resiliently mounted within the turbine housing. The handpiece handle is hollow and includes air and water tubes therein. The air and water are mixed within the handpiece at the point of expulsion from the handpiece, thereby creating a coolant mist or fog on the dental bur and the tooth being drilled.

Abstract: Hand-operated instrument for dental care or tooth treatment having an electric drive, including a hand-grip portion, a slender instrument neck portion having one end integral with the hand-grip portion and a free end, a drive motor of the electric drive and a fluid reservoir disposed in the hand-grip portion, a working implement integral with the free end of the neck portion, means including a fluid duct at least partially disposed in the neck portion for supplying fluid from the reservoir to the working implement, and means including drive elements at least partially disposed in the neck portion and being driven by the drive motor for driving the working implement.

Abstract: A fluid control for powering and supplying coolant liquid to gas operated surgical and dental tools and for supplying irrigant to a suction-irrigation handpiece, selectively by remove control from a surgical or dental operating site. A console remote from the operating site has a pressurized gas source. The tool and an operator valve actuable for turning on the tool are located at the operating site, remote from the console. A tool gas supply at the console is actuable for supplying pressurized gas from the source to the remote operator valve and tool. A coolant supply at the console is actuable for delivering coolant liquid to an outlet tip located at the tool. Gas circuitry in the console responds to the drop in gas pressure in the tool gas supply resulting from turning on of the tool and thereby causes the coolant supply to supply liquid to the tip while the tool is running.

Abstract: A rotary dental polishing apparatus which utilizes a rotatably cylindrical cartridge for containing polishing paste therein. One end of the cartridge is provided with a polishing cup, the cavity of which is in communication with the interior of the cartridge to receive paste therefrom. The cartridge also comprises a wiper conveyer mechanism which is in communication with the outer end of the cartridge at the end opposite the cup and is prevented from rotating which results in the conveyer mechanism continuously urging the paste out of the cartridge into the cup. The cartridge may be configured to rotate at a right angle to the drive source.

Abstract: A dental appliance for supporting marking paper within a patient's mouth and for directing a supply of air toward the marking paper, including first means for holding marking paper for insertion into a patient's mouth between opposing tooth surfaces, the first means including jaw members for holding the marking paper and additionally including means for opening the jaw members for releasing the marking paper, and second means operatively coupled to the jaw members for receiving and directing a supply of air toward the marking paper for maintaining the marking paper and the opposing tooth surfaces dry.

Abstract: A dental handpiece having a holding sleeve, an air-driven unit mounted at one end of the sleeve to drive a dental tool, and a connecting member releasably and relatively rotatably connected to the other end of the sleeve. A supply hose for conveying fluid pressure media is coupled releasably and non-rotatably to the end of the connecting member remote from the sleeve, and communicating fluid pressure lines in the connecting member and in the sleeve convey fluid pressure media between the hose and consumers of fluid pressure media at the free end of the sleeve, such as the tool-drive unit. The releasable connection between the connecting member and the sleeve is provided by a pin on the connecting member which is received by a passage in the sleeve. The fluid pressure lines in the connecting member extend also generally lengthwise along the pin, but terminate in radial portions having outlet apertures which are axially spaced along the outer periphery of the pin.

Abstract: A rotary connector is insertable between a standard dental supply hose and a standard dental handpiece to carry the customary air and water supplies while permitting unlimited relative rotation between the hose and the handpiece around the longitudinal axis of the hose, the connector and the handpiece.

Abstract: A dental handpiece in which an elongated handle sleeve is transversely divided by formation of an anterior sleeve showing a receptacle for a drivable dental-treatment instrument. A connected grip sleeve is detachable by a rotatable tightening ring. The handle sleeve has a coolant line running at least in the area of the transverse space within the inside of the sleeve outside the longitudinal axis of the handle sleeve, the coolant line is also transversely divided and leads to the area of the dental-treatment instrument. Two front sides of the anterior sleeve and the grip sleeve have both two front sides facing each other. One front side is provided with a projecting connecting piece for the cooling line and the other front side is provided with a connecting socket for an insertable connecting piece.

Abstract: A dental handpiece having a sleeve, an axial drive shaft in the sleeve for driving a dental instrument at one end of the handpiece, a first coolant supply line in the handpiece, a second coolant supply line extending axially towards the dental instrument, and a coolant duct in the wall of the sleeve which intercommunicates the first and second coolant lines. The coolant duct extends rectilinearly and generally radially between an inner end which faces the interior of the sleeve and which communicates with the first coolant line, and an outer end which communicates with and is releasably connected to the second line at a location in the wall of the sleeve and which permits manipulation externally of the handpiece for releasing and connecting the duct and the second line.

Abstract: An auxiliary enclosed fluid supply unit or system that is adapted to be used in conjunction with commercially available professional dental and medical equipment to permit the user to select a variety of fluids to be administered to the patient during dental and other procedures and maintain desired levels of sterility in the operative cite of the patient.

Abstract: An auxiliary fluid supply unit that is adapted to be used in conjunction with commercially available professional dental and medical equipment to permit the user to select a variety of fluids to be administered to the patient during dental and other procedures.

Abstract: A dental handpiece connector is adapted to be inserted between a standard dental handpiece and a standard supply tube for the handpiece. The connector allows rocking movement of the handpiece about a transverse axis and also allows rotary movement of the handpiece about a longitudinal axis, while continuing a supply of air or air and water from the supply tube to the handpiece. There is a detent to establish a preferred rocking position of the handpiece relative to the connector.