Abstract: A dental handpiece includes an end grip member having a configuration and shape to be gripped by an operator, such as a dentist, during use. The end grip member has a first end to be connected to a supply and a second end having therein a recess. At least one coolant line to receive coolant when the end grip member is connected to the supply extends through the end grip member. A plurality of tool holders support respective different tools and are interchangeable selectively connectable to and detachable from the second end of the end grip member. Each tool holder has a first end to carry a respective tool and a second end having an extension extended into the recess in the second end of the end grip member when such tool holder is connected thereto. The extension is configured to block coolant passage or to allow coolant passage through a selected portion of the coolant line.

Abstract: A dental handpiece includes an end grip member gripped by an operator during use. The end grip member has a first end to be connected to an air supply and a second end on which is selectively detachably mounted a tool holder supporting a tool that is driven either by a mechanical structure or by an air turbine, depending upon the particular tool holder mounted on the end grip member. Within the end grip member is an air motor, and a first air line extends from the first end to the air grip motor. When the tool holder includes the mechanical structure, then the first air line supplies air to the air motor, thereby to transmit power to the mechanical structure. A second air line extends through the end grip member between the first and second ends thereof. When the particular tool holder mounted on the end grip member includes an air turbine, the second air line supplies air thereto.

Abstract: A dental handpiece includes a handle portion having at a first end thereof a holder for a driven tool and which at a second end thereof is rotatably connected to a connecting portion which provides connection to a supply hose for supply media. Light supplied to the region of the tool is provided from an incandescent lamp arranged in a recess in the connecting portion. The recess may accommodate the incandescent lamp or a light guide and is arranged at an end of the connecting portion to be directed toward the hose and opens at such end.

Abstract: A dental handpiece includes a drive shaft which is driven by a drive motor and which has two coaxial ring gears which can selectively be coupled to shafts passing through different tool carriers. Different angular speeds of the coaxial ring gears is achieved by the inner ring gear being directly connected to the drive shaft, whereas the outer ring gear is driven by the drive shaft by way of a planetary transmission.