Siemens Aktiengesellschaft

Ernst-Otto Fleer

Werner Schuss

Erich Heubeck

A dental handpiece arrangement having a drive motor mounted in a motor cartridge which is connectible to a supply hose supplying various fluids and electrical power, a coupling member being mounted on the cartridge at one end and a sleeve member being telescopically received on the cartridge and either being an extension of a dental grip piece or an adapter for receiving conventional grip pieces characterized by an illumination arrangement which can either be a light source in the coupling member connected by optical waveguides extending through the sleeve member and the grip piece or can be an electrical connector connected to an electrical lead extending through the sleeve member to a light source either in the sleeve member or the grip piece so that both existing conventional grip pieces with or without the sleeve member can be utilized with the cartridge and coupling member regardless of the type of illumination arrangement being provided therein.

Dental handpiece arrangement with an illumination device

A dental handpiece which has at least two handpiece parts each having a drive shaft and a cooling line segment for at least one cooling line agent and an arrangement for releasably interconnecting the two parts with the gears of the drive shaft in driving engagement, the connecting arrangement including a guide fitting strip arranged on one of the handpiece parts and extending axially therefrom to be engaged in an axial extending guide slot in the other handpiece part to prevent twisting between the connected parts, characterized by the connecting arrangement comprising at least one catch element provided on one handpiece part and coacting with a counter element on the other handpiece part, and each of the cooling line segments of the one handpiece part extending into the guide fitting strip, the other handpiece part having a portion supporting each of its cooling line segments to project from a surface into the guide slot to form an axial connection with the segments of the fitting strip and a sealing arrangement for sealing each of the axial connection being formed.

Dental handpiece

An improved dental handpiece having a device for supplying a cooling agent to a driven dental instument supported in a head portion of a handle section which is removably mounted on a center section of a handpiece characterized by the device for supplying fluid supplying fluid to a first group of ports which are connectable with an external conduit of a first type of handle section for delivering fluid to the dental instrument and a second group of ports arranged to supply fluid to internal fluid passages of a second type of handle section in which the cooling conduits are incorporated therein and a device for preventing flow from one group of ports so that hand sections having either external cooling conduits or incorporated internal conduits for cooling fluid can both be utilized with the handpiece. In the embodiments of the improvement, the means for preventing flow may either be various valve arrangements, or specially designed plugs and fluid connections.

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Bensheim, Germany

Ernst-Otto Fleer