Centrifugal deflection device intended to be fitted to a surgical or dental handpiece to prevent the penetration of foreign matter that results from an operation, the centrifugal deflection device including a ring coupled in rotation either directly or via a tool shank to a drive shaft of the handpiece. This device is characterized in that the ring is covered by a sleeve secured to the front end of the body of the handpiece and which, with the ring, delimits an ejection chamber. The ejection chamber includes an inlet that communicates with a rear area of the handpiece and an outlet that communicates with the external environment, the ring having a first diameter at the outlet of the ejection chamber and a second diameter at the inlet of the ejection chamber, the first diameter of the ring being larger than the second diameter of the ring.

The invention relates to a method for producing a dental drill that has a shank (1) and a work section. The shank contains a centrally arranged, continuous first channel (3). The work section contains one or more continuous, spiral-shaped further channels (4a, 4b). The first channel and the further channels open into a common chamber (5) connecting the shank and the work section. The shank is sintered with the work section in order to form a one-piece, sintered component that encloses the chamber connecting the shank and the work section.

A medical or dental fluid-driven handle with a control or regulation circuit for the control or regulation of the rotational speed of a rotary part to a predetermined rotational speed and methods are presented. The handle comprises a rotary part that can be set in rotary motion by a drive fluid, a fluid line carrying the drive fluid to or from the rotary part or a fluid branch line that is connected to a fluid line carrying the drive fluid, and a control or regulation circuit that is designed to control or regulate the rotational speed of the rotary part. An electrodynamic converter is driven by the rotary part for generating electrical energy. An actuator element is configured to act on the drive fluid and is electrically connected to the electrodynamic converter such that the actuator element is supplied with electrical energy generated by the electrodynamic converter.

A medical or dental fluid-driven handle with a control or regulation circuit for the control or regulation of the rotational speed of a rotary part to a predetermined rotational speed and methods are presented. The handle comprises a rotary part that can be set in rotary motion by a drive fluid, a fluid line carrying the drive fluid to or from the rotary part or a fluid branch line that is connected to a fluid line carrying the drive fluid, and a control or regulation circuit that is designed to control or regulate the rotational speed of the rotary part. An electrodynamic converter is driven by the rotary part for generating electrical energy. An actuator element is configured to act on the drive fluid and is electrically connected to the electrodynamic converter such that the actuator element is supplied with electrical energy generated by the electrodynamic converter.

The overload protection device used on a high-speed dental handpiece includes a valve body, a piston, an elastic member, and a valve plug. The valve body is provided with an air chamber and an air intake passage in communication with each other. The piston is arranged in the air chamber. The valve plug is arranged at an end of the air chamber away from the air intake passage and is connected with the valve body. The elastic member is arranged between the piston and the valve plug. An outer surface of the valve body is provided with a plurality of air discharging holes which is in communication with the air chamber. The piston is capable of opening or closing the air discharging holes when moving vertically within the air chamber. The present invention further discloses a high-speed dental handpiece with an overload protection device.

The overload protection device used on a high-speed dental handpiece includes a valve body, a piston, an elastic member, and a valve plug. The valve body is provided with an air chamber and an air intake passage in communication with each other. The piston is arranged in the air chamber. The valve plug is arranged at an end of the air chamber away from the air intake passage and is connected with the valve body. The elastic member is arranged between the piston and the valve plug. An outer surface of the valve body is provided with a plurality of air discharging holes which is in communication with the air chamber. The piston is capable of opening or closing the air discharging holes when moving vertically within the air chamber. The present invention further discloses a high-speed dental handpiece with an overload protection device.

A dental system comprises a dental prophy angle and an adjustable angle adapter. The prophy angle includes a housing and a guard with a concave inner surface. The adapter is configured to drive the prophy angle and the adapter includes a body, a nose, and an outer joint. The nose is configured to receive a portion of a prophy angle. The body is adjustably connected to the nose. The outer joint includes a ball portion connected to the nose, and a ball receiver positioned on the body. The ball receiver includes a first portion coupled to a first end of the body and a second portion attachable to the first portion. The nose is rotatable relative to the body into at least a first configuration and a second configuration. The concave inner surface of the guard engages a convex outer surface of the ball receiver.

A dental system comprises a dental prophy angle and an adjustable angle adapter. The prophy angle includes a housing and a guard with a concave inner surface. The adapter is configured to drive the prophy angle and the adapter includes a body, a nose, and an outer joint. The nose is configured to receive a portion of a prophy angle. The body is adjustably connected to the nose. The outer joint includes a ball portion connected to the nose, and a ball receiver positioned on the body. The ball receiver includes a first portion coupled to a first end of the body and a second portion attachable to the first portion. The nose is rotatable relative to the body into at least a first configuration and a second configuration. The concave inner surface of the guard engages a convex outer surface of the ball receiver.

The present invention relates to a finger mountable flexible dental hand-piece device. In one embodiment the hand piece device comprises of: a head portion and a body portion, wherein the head portion and the body portion are engaged by a flexible joint to provide flexible movement for the head portion. The head portion defines a head enclosed in a head shell, where the head shell is accompanied by a first finger band which is stipulated on the top of the head shell. The body portion has a first end and a second end; the first end of the body portion is to engage with the head portion, wherein there is a second finger band which is stipulated on the top of the body portion.

The present invention relates to a finger mountable flexible dental hand-piece device. In one embodiment the hand piece device comprises of: a head portion and a body portion, wherein the head portion and the body portion are engaged by a flexible joint to provide flexible movement for the head portion. The head portion defines a head enclosed in a head shell, where the head shell is accompanied by a first finger band which is stipulated on the top of the head shell. The body portion has a first end and a second end; the first end of the body portion is to engage with the head portion, wherein there is a second finger band which is stipulated on the top of the body portion.