Young Dental Manufacturing Company

Other

Young Dental Manufacturing Company 1, LLC

Young Dental Mfg. Co.

Ronald L Bailey

Mark S Putt

Joseph C Muhler

Harold H Bennett

D Keith Chipman

A high-speed medical/dental handpiece includes a handle, which carries air, water, and light to a disposable cartridge which is received on the sleeve. The cartridge includes a head portion and a sleeve portion. The cartridge head defines a chamber having an upper and lower portions each of which receives a bobbin shaped sleeve bearing, and a central portion which receives a turbine. The bearings each form annular channels with their respective chambers. The cartridge includes water and air passages which direct water to the turbine so that the turbine is driven by an air/water mixture. Water is also directed to the upper bearing and grooves in the lower bearing chamber allow water to enter the annular channel around the lower bearing. Axial passages in the bearings enable water to pass from the annular chamber to the bit to contact the bit shaft. The air and water in the chamber are exhausted through the bit opening in the bottom of the head as well as through a plurality of exhaust ports in the head. The use of water in the turbine reduces the noise and vibration of the handpiece during operation of the handpiece and facilitates cooling of the bit. The cartridge sleeve includes a snap arm which engages the handle to hold the cartridge on the handle and a release arm which, when pressed, causes the snap arm to disengage the handle to allow for removal of the cartridge from the handle.

High speed turbine cartridge for use with a medical/dental handpiece

Pouch

A high speed dental handpiece (,) of the present invention includes a metal non-disposable body (,) and a plastic disposable cartridge (,) received in the body (,). The body (,) is a one-piece body, has a sleeve (,), and an annular head (,) at an end of the sleeve (,). The sleeve (,) carries an air input line (,), an air exhaust path, a water line (,), and a fiber optic cable (,). The air input and water line (,) are operatively connected to a supply of air and water, respectively. The fiber optic cable (,) is operatively connected to a source of light to carry the light to a patient's mouth to enable a dentist to more clearly see what is being operated upon. The disposable cartridge carries a turbine (,) and is placed in communication with the air input line (,) to drive the turbine. A bit (DB) is received by the turbine (,) and the water is directed toward the bit for cooling.

Autoclavable dental handpiece with disposable high speed turbine

A prophylaxis cup is provided which has a lower portion and an upper portion. The lower portion of the cup is adapted to mount the cup to a driven member of a prophylaxis angle. The upper portion of the cup includes a wall having an inner surface and an outer surface. The inner surface is smooth and uninterrupted and defines a cavity having a floor and which receives prophylaxis paste. A central post extends up from the cavity floor. A continuous, uninterrupted, circumferential flange extends inwardly from a top of the wall's inner surface. A sloped working surface extends between the flange inner edge and the wall outer surface. The cup is pre-formed to define a flare or annular wedge at the outer edge of the working surface which is sized to permit the working surface to clean a tooth subgingivally and interproximally. A generally circular groove on the working surface helps hold the prophy paste. The groove spirals outwardly.

Dental prophylaxis cup

A maintenance-free dental prophylaxis angle includes a one-piece body including a sleeve and a head. The sleeve and head define intersecting bores. A drive assembly, comprising a drive gear and a bushing, is force fitted in the sleeve. A one-piece driven gear is received in the head bore to be driven by the drive assembly. The driven gear includes an upper bur tube, a gear part, and a lower shaft. The gear part of the driven gear rests on an upper face of a boss in the head, the boss forming a thrust bearing for the driven gear. Intersecting bores in the boss form part of a lubricant circulating system. A metal cap is force fitted in the head bore to close the head bore and retain the driven gear in place in the head. A dental tool is connected to the bur tube of the driven gear, and forms a seal with the cap.

Permanently lubricated dental prophylaxis angle

A high-speed dental handpiece of the present invention includes a metal non-disposable body and a plastic disposable cartridge received in the body. The body is a one piece body and has a sleeve and an annular head at an end of the sleeve. The sleeve carries an air input line, an air exhaust path, a water line and a fiber optic cable. The air input and water lines are operatively connected to a supply of air and water, respectively. The fiber optic cable is operatively connected to a source of light to carry the light to a patient's mouth to enable a dentist to more clearly see the area being operated upon. The disposable cartridge carries a turbine and is placed in communication with the air input lines to drive the turbine. A bit is received by the turbine and the water is directed toward the bit for cooling. The cartridge is at least partially made of light transmitting material and the fiber optic cable abuts the cartridge to transmit light therethrough. The fiber optic cable may be removably inserted in the handpiece. The use of a disposable cartridge allows for thorough cleaning and sterilizing of the handpiece body without worry of damaging a turbine or its related bearings.

A plastic, disposable, easy-to-assemble dental angle is provided. The angle includes a one-piece hollow body having a head at its front end which is angled with respect to the body. Both the head and the body have a bore therethrough. The head has an aperture which is centered with respect to the bore of the body to allow insertion of a drive gear through the head of the angle. A driven gear is inserted in the head from above. A snap cap fits within the head over the driven gear to lock both the drive gear and the driven gear in the angle. A sheath on the cap covers the aperture. A latch on the cap is received in the aperture to lock the cap to the head to hold the angle together. An elongated slot in the body permits the body to be force-fit on a dental handpiece. In an alternative embodiment, the length of the angle is shortened so that the thrust load produced during use is carried by a rolling contact in the handpiece to which the angle is secured, rather than by a sliding, friction-producing, contact between the drive gear's shaft and the surfaces of the angle itself. In a third embodiment, a simple, disposable contra-angle is provided.

Method of assembling a dental prophylaxis angle

A dental prophylaxis angle includes a body having a sleeve, a neck, and a one piece hollow head formed at the end of the neck. A drive member, including a drive gear and shaft is received in the body. A driven member, including a driven gear and shaft, is received in the head so that the driven and drive gears mesh with each other. A cap is received and secured in the head and snappingly receives the driven member. The cap locks the driven member in the head of the angle. The driven member includes a platform spaced above the driven gear having a diameter equal to the diameter of the head to close the opened head. The platform and driven gear define a channel. The cap has a side wall, a part of which is flexible. A finger extends inwardly from the flexible portion of the cap wall and into the channel between the driven gear and platform to snappingly secure the driven member in the cap. The cap includes a projection which interacts with the head to lock the cap in the head. A method of assembling the angle is also disclosed.

Disposable prophylaxis angle

A maintenance-free dental prophylaxis angle includes a one-piece body including a sleeve and a head. The sleeve and head define intersecting bores. A drive assembly, comprising a drive gear and a bushing, is force fitted in the sleeve. A one-piece driven gear is received in the head bore to be driven by the drive assembly. The driven gear includes an upper bur robe, a gear part, and a lower shaft. The gear part of the driven gear rests on an upper face of a boss in the head, the boss forming a thrust beating for the driven gear. Intersecting bores in the boss form part of a lubricant circulating system. A metal cap is force fitted in the head bore to close the head bore and retain the driven gear in place in the head. A dental tool is connected to the bur tube of the driven gear, and forms a seal with the cap.

A dental prophylaxis angle includes a body defining a sleeve and a head. A drive assembly is rotatably mounted in the sleeve. A driven gear is rotatably received in the head to be driven by the drive assembly. A cap is mounted in the head to close the head and retain the driven gear in place in the head. A threaded bur tube on the driven gear extends into a stem portion of the cap. The stem portion includes an externally beveled annular knife edge which forms a seal with a dental tool, such as a prophy cup, which is threaded into the bur tube. A protector ring on the cap surrounds the knife edge to prevent damage to the knife edge should the angle be dropped or otherwise contact a hard surface. The protector ring is spaced from the stem sufficiently to permit an elastomeric portion of the dental tool to extend between the stem and the ring.

Dental prophylaxis angle with seal protector

Dental prophylaxis angle

A plastic, disposable, easy-to-assemble dental angle is provided. The angle includes a one-piece hollow body having a head at its front end which is angled with respect to the body. Both the head and the body have a bore therethrough. The head has an aperture which is centered with respect to the bore of the body to allow insertion of a drive gear through the head of the angle. A driven gear is inserted in the head from above. A snap cap fits within the head over the driven gear to lock both the drive gear and the driven gear in the angle. A sheath on the cap covers the aperture. A latch on the cap is received in the aperture to lock the cap to the head to hold the angle together. An elongated slot in the body permits the body to be force-fit on a dental handpiece. In an alternative embodiment, the length of the angle is shortened so that the thrust load produced during use is carried by a rolling contact in the handpiece to which the angle is secured, rather than by a sliding, friction-producing, contact between the drive gear's shaft and the surfaces of the angle itself. In a third and fourth embodiment, a simple, disposable contra-angle is provided and a method is provided for making it from a straight prophylaxis angle.

Disposable dental prophylaxis contra-angle, method of making it, and

A dental scaler is provided which has a control unit and a handpiece assembly linked to the control unit by a conduit carrying fluid and electrical power. The handpiece assembly includes a conduit connector secured to an end of the conduit remote from the control unit and an autoclavable handpiece removably securable to the conduit connector. The connector and handpiece have slidably connectable bodies, each having mating fluid and electrical connectors. The handpiece connector body includes a check valve to prevent rearward flow of water. The conduit connector body includes a check valve and a double fluid tight seal. The use of the two check valves and two seals reduces the possibility of fluid leaking from the back of the handpiece or from the connector. The conduit connector body is received in a sleeve of the handpiece. The connector has a finger which is received in an axial slot of the handpiece sleeve. The finger and slot form a size-on-size fit to frictionally hold the conduit connector and handpiece together.

Autoclavable dental scaler handpiece

A prophylaxis cup is provided to be used with a dental prophylaxis angle. The cup includes an elastomeric body having an upper section and a lower section and a threaded shaft extending axially from the lower section. The shaft has a head embedded in the body's lower section. The lower section has a deformable annular ring concentric with, and adjacent to, the shaft head. The ring is deformable outwardly into an adjacent annular groove radially outboard of the ring. A peripheral slinger or skirt outboard of the groove extends downwardly and away from the groove. The cup's body upper section defines a pocket which receives cleaning abrasives. When the cup's shaft is threaded into a rotatable driven gear on the dental prophylaxis angle, a stationary edge of a hollow cap stem on the angle engages the cup's ring, to form a rotational ring seal. The structure of the cup ensures that the seal is maintained even when the cup is bent or deformed during use.

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Harvester, MO, United States of America

Ronald L Bailey