Patent ID: 9318934
Filing Date: 2016-04-19
CPC Classification: A61C,H02K

Claim Text:
1. 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.