Powder reservoir for a dental abrasive sprayer
AssigneeFerton Holding S.A.
InventorsJulien Cevey, Lutz Beerstecher
Life of this patent
Estimating the term…
Abstract
A powder reservoir for a dental abrasive blasting apparatus is provided with a discharge valve having a closure body that comprises associated driving means for moving a closure body with a pulsed frequency alternately between a closing position and an opening position of an associated discharge opening of the powder reservoir for discharging the powder into a mixing chamber which is passed by a supply line for compressed air for supplying a handpiece with a mixture of compressed air and abrasive powder particles.
Claims19
A powder reservoir for a dental abrasive blasting apparatus which is connected with a handpiece having a nozzle arrangement at a tip portion for discharging a jet stream of a mixture of compressed air and abrasive powder particles which is supplied from a mixing chamber that is arranged below a discharge opening of the powder reservoir, comprising:
- a discharge valve having a closure body which is biased towards a closing position of the discharge opening of the powder reservoir for blocking discharge of powder particles into the mixing chamber, and
- driving means associated with the closure body of the discharge valve for moving the closure body into a pulsed opening position alternately with respect to its closing position in which the powder particles are discharged from the powder reservoir for being mixed with a stream of compressed air which is passed through the mixing chamber at a position underneath of the discharge opening whereby a pulse frequency of the driving means which is associated with the closure body of the discharge valve is chosen such as to determine a desired dosage for the mixture of the powder particles with the compressed air,
- wherein the pulse frequency of the driving means is controlled in a range between 0.5 and 100 Hz at pulse width between 0 and 100%.
A powder reservoir for a dental abrasive blasting apparatus which is connected with a handpiece having a nozzle arrangement at a tip portion for discharging a jet stream of a mixture of compressed air and abrasive powder particles which is supplied from a mixing chamber that is arranged below a discharge opening of the powder reservoir, comprising:
- a discharge valve having a closure body which is biased towards a closing position of the discharge opening of the powder reservoir for blocking discharge of powder particles into the mixing chamber, and
- driving means associated with the closure body of the discharge valve for moving the closure body with a pulse frequency into a pulsed opening position alternately with respect to its closing position so that the powder particles are discharged from the powder reservoir in a pulsed sequence for being mixed with a stream of compressed air which is passed through the mixing chamber at a position underneath of the discharge opening,
- said closure body of the discharge valve being moved with said pulse frequency so as to determine a desired dosage for the mixture of the powder particles with the compressed air while said air is passed through said mixing chamber.
Dependencies are inferred from the claim text.