Nozzle head for the hand piece of a dental prophylactic apparatus
First Claim
1. A nozzle head for the hand piece of a prophylactic apparatus for cleaning teeth, comprising a connector having two axially contiguous interconected members, an inner tube, ending in a first orifice, as a supply conduit for an abrasive powder material in mixture with air under pressure, and an outer tube, ending in a second orifice, as a supply conduit for water under pressure, the outer tube being fixed to the one member of the connector as arranged coaxial to the inner tube with a circular gap inbetween, over a portion of the length of the inner tube extending to said first orifice of the outer tube, said connector having two axially parallel bores adapted for an interconnection of first and second supply lines with said inner and outer tubes, said two bores of the connector being interconnected through a transverse bore extending at a right angle to their axes;
- the improvement comprising;
said two members of said connector being positioned with respect to each other with an axis that is in common with the one bore of said two bores through which said first supply line is connected in said one member of the connector to said inner tube.the other bore of said two bores through said second supply line is connected to said outer tube being provided in the other member of said connector,said transverse bore extending between the two members of said connector,said one bore being provided in a centering pin of said one member of the connector, said other member of the connector being fixed on this centering pin and being provided with an outer thread for a screw connection with the hand piece.
1 Assignment
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Accused Products
Abstract
A nozzle head for the hand piece of a dental prophylactic apparatus comprises a connector having two members that are centered with respect to each other along an axis that is in common with the connecting end of an inner tube with a supply line for an abrasive powder material in mixture with air under pressure and also in common with the connecting end of an outer tube as fixed to the same connector member with a supply line for water under pressure through a transverse bore extending between the two connector members, the inner and outer tubes forming first and second orifices that preferably open towards a cup-shaped hollow space formed by a coaxially arranged circular collar.
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Citations
15 Claims
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1. A nozzle head for the hand piece of a prophylactic apparatus for cleaning teeth, comprising a connector having two axially contiguous interconected members, an inner tube, ending in a first orifice, as a supply conduit for an abrasive powder material in mixture with air under pressure, and an outer tube, ending in a second orifice, as a supply conduit for water under pressure, the outer tube being fixed to the one member of the connector as arranged coaxial to the inner tube with a circular gap inbetween, over a portion of the length of the inner tube extending to said first orifice of the outer tube, said connector having two axially parallel bores adapted for an interconnection of first and second supply lines with said inner and outer tubes, said two bores of the connector being interconnected through a transverse bore extending at a right angle to their axes;
- the improvement comprising;
said two members of said connector being positioned with respect to each other with an axis that is in common with the one bore of said two bores through which said first supply line is connected in said one member of the connector to said inner tube. the other bore of said two bores through said second supply line is connected to said outer tube being provided in the other member of said connector, said transverse bore extending between the two members of said connector, said one bore being provided in a centering pin of said one member of the connector, said other member of the connector being fixed on this centering pin and being provided with an outer thread for a screw connection with the hand piece. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- the improvement comprising;
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9. A nozzle head for the hand piece of a prophylactic apparatus for cleaning teeth, comprising a first orifice for a central ejection of air under pressure in mixture with an abrasive powder material and a second coaxial orifice for a surrounding ejection of water under pressure from an annular passageway coaxial with and surrounding said central passageway;
- the improvement comprising;
a circular collar in a coaxial arrangement with said two orifices and projecting downstream therefrom forming a cup-shaped hollow space downstream of said orifices in which the surrounding ejection of water generates a vortex motion around the axis of said hollow space when the collar is brought into close proximity with the teeth, said air mixture being projected into said area of vortex motion, the axial length of this hollow space being larger than the inner diameter of said second orifice. - View Dependent Claims (10, 11, 12, 13, 14, 15)
- the improvement comprising;
Specification