Fluid-operated medical or dental handheld element

摘要

A fluid-operated medical or dental handheld element is disclosed, having a connecting device for connecting the handheld element to a fluid source so that a first impeller can be induced to rotate by a fluid stream to cause a tool to execute a driving motion, a fluid conducting device arranged between the connecting device and the first impeller for conveying a fluid stream away from or toward the first impeller, and a generator for generating electric power. The generator includes a second rotatable impeller that can be driven by at least a substream of the fluid stream conveyable in the first fluid conducting device. One result is more constant generation and output of power by the generator independent of the rotational speed of the first impeller, thereby insuring a more constant power supply to a power consuming device connected to the generator.

主权项

1. A fluid-operated handheld element for medical or dental use, comprising:
a connecting device for connecting the handheld element to a fluid source to provide a fluid stream; a first impeller rotatable by at least a part of said fluid stream, wherein said first impeller is coupleable to a tool to impart a working motion to the tool; and a generator cartridge comprising an outer cartridge shell and a generator at least partially inside the outer cartridge shell having a rotor with a second rotatable impeller and a rotor magnet, a stator surrounding the rotor and at least one bearing for rotatable mounting the rotor, said generator cartridge being entirely and detachably arranged in a tubular fluid conducting device of the handheld element to supply the fluid stream to the generator to drive the generator and operable to generate electric power, the second impeller being rotatable by at least a part of the fluid stream, wherein the handheld element comprises two parts, wherein each of the two parts of the handheld element comprises one of the first and second impellers and wherein the two parts of the handheld element are releasably connectable with each other, wherein the two parts of the handheld element comprise a first part comprising a handpiece and a second part comprising a coupling or an adapter, wherein the generator cartridge is arranged in the second part, wherein the first part of the handheld element comprises an electric power consuming device, said electric power consuming device being connected electrically with the generator via electrical contacts on the first part and via annular electrical contacts having an inner clearance on the second part for supplying electric power generated by the generator to the electric power consuming device, wherein the second part comprises a connecting end having a connection device for releasable connection to the first part and the second part comprises a water line having an opening which is configured to conduct water into the first part of the handheld element, the water line being separate from the fluid stream and wherein said opening is arranged at the connecting end of the second part, wherein at least one sealing element is arranged between the opening of the water line and the electrical contacts on the second part, and wherein the water line passes through the inner clearance of the annular electrical contacts on the second part of the handheld element.