Pièce à main dentaire motorisée munie d'un accessoire électrique tel qu'un éclairage
The accessory e.g. lamp for illumination of the hand-held instrument (L) and the excitation coils (B1-B3) of the brushless motor (M) are all supplied with current through a rotary connector (F) from a control circuit (C1) within a fixed part of the machine or power cable. Positive and negative supply lines (L1, L2) from a voltage source (S) feed three pairs of controlled transistor switches (CE1-CE3) whose midpoints (P1-P3) are wired to terminals (b1-b3) of the star-connected coils. The lamp is fed from a separate controlled switch (T4) wired to one (N1) of its terminals; the other (N2) is returned to the free terminal (b3) of one coil. <IMAGE>
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FR2720263-A1; EP688539-A1; EP688539-B1; DE69511630-E Cardoletti L. et Perriard V. ne sont pas nommés sur le brevet EP688539-A !!!!
Alternative title(s) : (de) Zahnärtzliches handstück mit einem antrieb und mit elektrischem zubehör, vorzugsweise belichtungsvorrichtung (fr) Pièce à main dentaire motorisée munie d'un accessoire électrique tel que'un éclairage (en) Motorized dental hand piece with electrical accessory such as lighting device
Patent number | Country code | Kind code | Date issued |
DE69511630 | DE | T2 | 2000-03-02 |
DE69511630 | DE | D1 | 1999-09-30 |
AT183630 | AT | T | 1999-09-15 |
EP0688539 | EP | B1 | 1999-08-25 |
FR2720263 | FR | B1 | 1996-09-13 |
EP0688539 | EP | A1 | 1995-12-27 |
FR2720263 | FR | A1 | 1995-12-01 |