Electric motor arrangement for a medical, especially dental, tool holder
AssigneeKaltenbach & Voigt GmbH & Co.
InventorsJosef Duesing, Alfons Mader, Johann Stempfle
Life of this patent
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Abstract
An electric motor arrangement for a medical, especially dental, tool handle, which is extremely compact and resistant to sterilizing temperatures due to a plurality of advantageous embodiments. The electric motor arrangement is characterized by the following properties: the use of a light source based on SMD-LED or LED as a semiconductor chip; the shortening of the INTRAmatic coupling to between 20 mm and 25 mm; a hermetically extruded stator comprising integrated media tubes and molded connection sockets; the stator winding is embodied as a coil segment winding instead of an H winding or triangle; and the winding head has openings for media tubes.
Claims14
An electric motor arrangement for a medical handpiece, comprising
- a coupling pin configured to connect to the handpiece,
- a rotor with a rotor shaft having a shaft end extending into the coupling pin,
- a stator arranged around the rotor with respect to the rotor shaft,
- a medium tube for guiding a medium through the electric motor arrangement,
- a sheath element formed by encapsulation by injection molding, the sheath element, with respect to the rotor shaft, tightly surrounding a radially outward surface of both the stator and the medium tube in a closed manner,
- a claw disposed on the shaft end extending into the coupling pin;
- wherein the claw is configured to deliver torque from the rotor shaft to the medical handpiece,
- the stator has a stator winding, and a first part of the stator winding, with respect to the rotor shaft, is arranged radially outside the medium tube, and a second part of the stator winding radially inside the medium tube, and
- electrical conductors configured to make electrical contact with the stator, the electrical conductors extending through the stator winding in an axial direction and extending outwardly from the sheath element.
Dependencies are inferred from the claim text.