FLUID-OPERATED MEDICAL OR DENTAL HANDLE
First Claim
1. A fluid-operated medical or dental handle comprisinga rotating part that can be induced to rotate by a driving fluid for driving a tool connectable to the rotating part,an electrodynamic transducer driven by the rotating part for induction of an electric voltage, the electrodynamic transducer comprising at least one coil and one magnetic element, andat least one switch element for selectively opening and closing of a circuit between the two ends of the at least one coil, so that with the circuit closed, an electric current and an induced magnetic field decelerating the rotational speed of the rotating part and of the tool connectable thereto can be induced in the coil of the electrodynamic transducer.
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Accused Products
Abstract
A fluid-operated medical or dental handle with a device for limiting the rotational speed to a maximum rotational speed value is disclosed. The handle comprises a rotating part that can be induced to rotation by a driving fluid for driving a tool connectable to the rotating part, an electrodynamic transducer driven by the rotating part for induction of an electric voltage, wherein the electrodynamic transducer has at least one coil and a magnetic element and at least one switch element for optional opening and closing of a circuit between the two ends of the at least one coil, so that with the circuit closed, an electric current and an induced magnetic field that decelerates the rotational speed of the rotating part and the tool connectable thereto can be induced in the coil of the electrodynamic transducer.
27 Citations
19 Claims
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1. A fluid-operated medical or dental handle comprising
a rotating part that can be induced to rotate by a driving fluid for driving a tool connectable to the rotating part, an electrodynamic transducer driven by the rotating part for induction of an electric voltage, the electrodynamic transducer comprising at least one coil and one magnetic element, and at least one switch element for selectively opening and closing of a circuit between the two ends of the at least one coil, so that with the circuit closed, an electric current and an induced magnetic field decelerating the rotational speed of the rotating part and of the tool connectable thereto can be induced in the coil of the electrodynamic transducer.
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19. A method for limiting the rotational speed of a fluid-operated medical or dental handle comprising a rotating part capable of connection to a tool inducible to rotate by action of a driving fluid, transducer driven by the rotating part, the electrical transducer comprising at least one coil and one magnetic element, and at least one switch element for selectively opening and closing a circuit between ends of the at least one coil, the method comprising:
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inducing a voltage in the at least one coil of the electrodynamic transducer by initiating rotation of the rotating part, and selectively closing a circuit between the two ends of the at least one coil with the switch element, so that an electric current and an induced magnetic field that decelerates the rotational speed of the rotating part and any tool connected thereto are induced in the coil of the electrodynamic transducer.
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Specification