Powder-blasting device

Joining unit for a powder-blasting device for cleaning dental surfaces by applying a powder-gas mixture, wherein the joining unit is designed to connect a handpiece of the powder-blasting device with a stationary unit of the powder-blasting device, and wherein the joining unit is provided with a joining guide to be arranged between the stationary unit and the handpiece, the joining unit comprising,

• a first coupling section for the detachable connection with a corresponding second coupling section of the stationary unit and
• a powder-gas line for conducting a powder-gas mixture, with a tube section lockable by means of elastic deformation and a housing body for holding and accommodating the lockable elastic tube section, wherein the housing body comprises a rigid housing for this,
• wherein the first coupling section is disposed on the housing body of the joining unit such that the housing body of the joining unit is directly detachably connected to a housing of the stationary unit;
• wherein a pinch valve is at least partially integrated into the joining unit;
• and
• wherein between the stationary unit and the joining unit an air connection is provided for operating the pinch valve.

A powder-blasting device for cleaning the surfaces of teeth by applying a powder-gas mixture, comprising

• a stationary unit with a connecting section for a mixing chamber for producing the powder-gas mixture, a handpiece with a nozzle device for blasting the powder-gas mixture onto the surface of teeth, and a joining unit for connecting the handpiece with the stationary unit,
• wherein the joining unit has at least one joining guide between the stationary unit and the handpiece,
• wherein a tube section lockable by means of elastic deformation is disposed in a powder-gas line between the mixing chamber and the nozzle device,
• wherein the joining unit is detachably connected with the stationary unit by means of a first coupling section for coupling to a corresponding second coupling section of the stationary unit and comprises a housing body wherein the housing body comprises a rigid housing, and
• wherein the first coupling section is provided at the housing body of the joining unit and is directly detachably connected to the housing of the stationary unit,
• the device further comprising means to regulate passage of a liquid through the joining unit;
• wherein a pinch valve is at least partially integrated into the joining unit;
• and
• wherein between the stationary unit and the joining unit an air connection is provided for operating the pinch valve.