Abstract: A portable dental delivery system is provided which is composed of a plurality of individual module sections. The portable delivery system provides all basic tools and accessories which are necessary for a dentist to perform all types of dental work which may be required by patients. The dental delivery system includes a quiet running, pressurized clean air supply system for operating the various tools and accessories utilized by the dentist. A hermetically enclosed refrigeration compressor unit is modified to provide an adequate supply of pressurized air in an extremely quiet manner. The temperature of the compressor unit is maintained at a safe level by an oil cooling system. A pump draws oil from the base of the compressor unit, passes it through a radiator which is additionally cooled by an axial fan. The oil is returned to the compressor unit at the top of the housing at a location which will cause the oil to impinge directly upon the cylinder head of the compressor.

Abstract: An electric motor-driven drill has an irrigating tube for squirting water onto a drill bur. The tube has convolutions surrounding the motor for cooling the motor and warming the irrigating water. A quick-release chuck holds the bur shank coupled to the motor shaft.

Abstract: A handpiece for medical treatment having a brushless micromotor mounted in a handpiece casing for driving a cutting tool and having a coolant passageway formed on the outer periphery of a cylindrical yoke fixed to the frame of the handpiece body. In this handpiece, the coolant passageway is formed helically around the axis of the yoke from one end to the other end of the yoke. The sectional area of the yoke in any given longitudinal sectional position along the axis of the yoke is rendered approximately equal to prevent a reduction in motor torque and also enlargement of the handpiece in diameter.

Abstract: An arrangement for imposing pressure on cleaning media and/or lubricants which are contained as maintenance media in the movable components of medical, particularly dental handpieces, wherein the maintenance medium is adapted to be placed under pressure by a pressure drive acting through an outlet opening of a housing which contains a motion drive for the movable handpiece components, the last mentioned being brought into connection with the outlet opening through an inlet opening in the handpiece. During this pressurization of the maintenance medium, the movable components of the handpiece are placeable into movement through the motion drive of the housing in such a manner, whereby engaging means of the motion drive which are accessible through the outlet opening of the housing can be brought into engagement with cooperating engaging means of the movable components of the handpiece which are accessible through the inlet opening.

Abstract: A dental handpiece has a powerhead assembly connected to a hollow handle portion including a tube supplying air under pressure, a water tube and an exhaust tube, a holding sleeve held to the hollow handle portion and a rotatably and detachable connecting means. The tube supplying air under pressure is connected through an interconnecting tube to a flexible air tube, the water tube is connected to a flexible water tube and the exhaust tube is connected to a flexible exhaust tube respectively while permitting the holding sleeve and the connecting means to rotate relative to each other about the longitudinal axis of the handpiece with a limited angle.

Abstract: A dental appliance has an elongated hollow tube within the interior of which is mounted for rotation an elongated drive shaft. One end of the tube is coupled to a handle as is the drive shaft which is driven from the handle in rotation. A head joined to the other end of the tube defines an interior cavity within which a hub is mounted for rotation about an axis disposed at an angle with respect to the drive shaft. Motion is translated from the drive shaft to the hub. An opening in the head enables the hub to be accessed through the opening. Included in the hub is a barrel section for securing a variety of dental attachments thereto. A seal is created between the opening from the cavity and the hub in order to prevent fluid flow therethrough. Lubricant is introduced within the tube and the drive shaft actuates an augar or the equivalent for propelling the lubricant into the motion translator.

Abstract: An arrangement for the dispensing of cleaning and/or lubricating media, which can be placed under pressure in a receptacle, as maintenance media to movable elements containing medical, and particularly dental handpieces. The maintenance medium is forced by means of a pressure drive out of a dispensing orifice of the receptacle through an inlet opening of the handpiece which is attached to the receptacle at the dispensing orifice and whereby, during the forcing of the maintenance medium into the movable elements of the handpiece, they are placeable into motion through a motion drive. The maintenance medium can be formed by liquid cleaning and/or lubricating media, for instance, such as oil.

Abstract: In the exemplary embodiment, two machines are arranged in a common cabinet-like housing insulated toward the exterior from sound conducted through solids and airborne sound. For the purpose of fresh air supply to the machines, there are provided common fresh air channels connected via an inlet port with the exterior air. In order to discharge the exhaust air, separately arranged exhaust air chambers and/or exhaust air channels are provided which discharge into the open air via a common outlet port, disposed at a location remote from the inlet port. The fresh air channels and the exhaust air channels are so designed and arranged that the air is deflected many times during its flow through the housing. The installation particularly serves the purpose of housing dental vacuum generating and compressed air generating electric machines.

Abstract: A dental bur drill of the type including a tubular handpiece traversed by at least one conduit for delivering compressed air to a rotor which is mounted at an extreme end portion of said handpiece and to the bearing-mounted rotating shaft to which a bur is fitted, wherein the handpiece incorporates a lube-oil container provided with an injection nozzle protruding within a delivery conduit, which conduit communicates with the container at a point upstream of the nozzle.

Abstract: A modular reduction gear for a dental handpiece comprises an input shaft coupled to the driving motor and provided with a pinion constituting the sun wheel of an epicyclic gear of which the planet carrier is rigid with the adjacent end of the output shaft transmitting the rotary motion to the dental instrument, the carrier supporting three planet pins having mounted thereon for free rotary motion three planet pinions meshing with the sun pinion and with a fixed toothed annulus clamped between the pair of sockets constituting the body of the handpiece.

Abstract: A method of lubricating a dental hand-piece wherein a small-sized lubricating oil sealed oiler is detachably mounted in a position adjacent to the rotor side of a rotor driving air passageway of a dental hand-piece device, the lubricating oil from said oiler is continuously mixed into rotor driving air to atomize said oil by utilizing the pressure and flow rate of said rotor driving air when said hand-piece is in use, and the mist oil thus obtained is supplied together with said air to said rotor to thereby continuously lubricate the rotor; and a novel small-sized oiler used in the method; are disclosed.

Abstract: A miniature motor for driving a hand-held instrument such as a dental handpiece, the motor having at one end a connecting member for supplying coolant to a motor coolant line and motive energy to the motor, and at the other end a coupling member to which a hand-held instrument can be releasably connected. An intermediate coolant line in the coupling member serves to transfer coolant from the motor coolant line to a coolant supply line in the instrument which directs the coolant to a working implement at one end of the instrument. The coolant line in the motor comprises a tubular member which is removably mounted in the motor and has a releasable connection at its inlet end to a coolant supply connector in the connecting member, and a releasable connection at its outlet end to the intermediate coolant line in the coupling member. At least one of these releasable connections is provided in a closure member which is removable in order to render the tubular member accessible for servicing.