Patent application number | Description | Published |
20090004622 | Dental, Dental-Medical or Dental-Technical Handpiece With Electric Motor - In a dental, dental-medical or dental-technical handpiece, having an elongate grip sleeve there are provided at the rearward end of the grip sleeve coupling elements for the connection of the handpiece to a supply hose to be connected with a dental supply arrangement, and there are provided at the forward end of the grip sleeve a head section with a tool receiver for mounting a tool to be put into rotation. The handpiece further has an electric motor for driving a tool held by the tool receiver, which motor is completely integrated into the grip sleeve such that grip sleeve and motor form a unit. | 01-01-2009 |
20100209872 | ROTOR FOR AN ELECTRIC MOTOR, ELECTRIC MOTOR AND DENTISTRY HANDPIECE - The rotor for an electric motor used with a dental handpiece has a shaft with a rotational axis and a magnet arranged around the rotational axis. A centering element may be rigidly connected to the shaft or constructed as part of the shaft. The centering element presses on the magnet from the outside to center it in relation to the rotational axis of the shaft. The centering element may be pressed or shrunk on to two balancing rings. The balancing rings can be pressed or shrunk on the shaft. This allows precise centering of the magnet with respect to the rotational axis of the shaft to be achieved. The pressure exerted by the centering element on the magnet counteracts centrifugal forces during rotor rotation. Particularly high speeds may be achieved without the surface of the magnet exceeding a critical tensile stress. | 08-19-2010 |
20100221676 | Coupling Between a Medical Handpiece Part and a Supply Hose - A coupling for the production of a releasable connection between a medical, in particular a dental, handpiece part and a supply hose and for the transmission of current and if applicable further supply media from the supply hose to the handpiece part. The coupling includes two coupling elements wherein one of the two coupling elements may be arranged on the supply hose and the other on the handpiece part. A guide element is arranged on one of the two coupling elements, which guide element can be inserted into an insertion opening formed on the other coupling element. In a certain relative rotational position of the two coupling elements a pushing element having current contacts engages into a corresponding recess of the second coupling element, wherein with inserted or at least partly inserted guide element the two coupling elements can be rotated relative to one another around an axis of rotation before attainment of the predetermined coupling position. Thereby there is formed a reliable bayonet coupling which makes possible a particularly easy handling. | 09-02-2010 |
20100233651 | Electric Motor For Use in a Dentist's, Dental Surgeon's or Dental Technician's Hand Piece - In an electric motor for use in a handpiece for dentistry, dental medicine or dental technology, with a rotor held rotatably by a bearing arrangement, and a stator surrounding the rotor, a bearing arrangement has a first bearing located on an end region of the rotor, and a second bearing located on an opposite end region of the rotor, which second bearing is constructed as a movable bearing and is biased in the direction of the first bearing by a spring arrangement. The spring force of the spring arrangement within an operating region is substantially independent of the position of the movable bearing. | 09-16-2010 |
20110269102 | Electric Motor for Use in a Sterilizable Dental Handpiece - In a dental, dental-medical or dental-technical handpiece, having an elongate grip sleeve there are provided at the rearward end of the grip sleeve coupling elements for the connection of the handpiece to a supply hose to be connected with a dental supply arrangement, and there are provided at the forward end of the grip sleeve a head section with a tool receiver for mounting a tool to be put into rotation. The handpiece further has an electric motor for driving a tool held by the tool receiver, which motor is completely integrated into the grip sleeve such that grip sleeve and motor form a unit. | 11-03-2011 |
20120085561 | Motor-driven Handpiece - A motor-driven handpiece, which has a grip sleeve with a head area for mounting a tool, in particular for the preparation of tooth substance and/or bone substance, in which the head area is at least partially surrounded or encapsulated by a thermoplastic material which, compared to the material of the rest of the grip sleeve, has a lower thermal conduction value. | 04-12-2012 |
20120288822 | Dental Hand Instrument having an Elongate Handle Sleeve - A dental hand instrument having an elongate handle sleeve, at the front end of which there are disposed means for holding a treatment tool, for example a dental drill, there are disposed inside the handle sleeve means for driving the treatment tool, which driving means have at least two rotatably mounted shafts that are coupled to each other, a sealing element being disposed in the coupling region of the two shafts inside the handle sleeve. | 11-15-2012 |
20120291814 | Process and System for Cleaning and Maintaining and for Operating a Medical Hand-held Instrument - A process and also to a system for cleaning and maintaining a medical hand-held instrument, in particular a dental hand-held instrument, with an elongate grip sleeve in which elements are arranged which pertain to a drive arrangement and which are, in particular, rotatably supported, for example a shaft. For the purpose of cleaning and maintaining the hand-held instrument different media are conducted through it. In this connection a first medium, for example oil, is conducted merely through a power-transmission region surrounding the elements of the drive arrangement, whereas, on the other hand, a second medium, for example a cleaning agent, is conducted additionally also through at least one further cavity within the hand-held instrument. | 11-22-2012 |
20140355921 | BEARING FOR ROTATABLY MOUNTING A ROTATIONAL PART AND DENTAL HANDPIECE WITH CORRESPONDING BEARING - A bearing for rotatably mounting a rotational part, for example a turbine rotor of a dental handpiece, has a plurality of roll bodies, in particular balls, arranged between an inner bearing ring and an outer bearing ring, a cage surrounding the roll bodies in an axial direction, and a locking element for axially locking the bearing rings with respect to each other, wherein the locking element has a ring-like or ring-segment-like securing element fitted on an inner circumference of the outer bearing ring or on an outer circumference of the inner bearing ring in a region of the cage such that the locking element blocks the roll bodies in the axial direction. | 12-04-2014 |