Tooth cleaning system, Powder container and Insert for a powder container

Abstract

Teeth cleaning system, in particular dental powder jet cleaning system, including a powder container having an inlet for compressed air, and where the powder container has an outlet for a powder/air mixture, and where the outlet communicates with a pipe system via which a fluid is passed, in particular a powder/air mixture which is formed in the powder container and from which powder container can be led, where a flow resistance of the inlet is configured relative to a flow resistance of the outlet and/or of the pipepipe system in such a way that a predetermined pressure loss is set across the inlet.

Claims

1. A tooth cleaning system, in particular a dental powder jet cleaning system, comprising a powder container, wherein the powder container has an inlet for compressed air, and wherein the powder container has an outlet spaced from the inlet for a powder/air mixture, and wherein the outlet is connected to a pipe system, via which a fluid can be led out from the powder container, wherein a flow resistance of the inlet is configured relative to a flow resistance of the outlet and/or of the pipe system in such a way that a predetermined pressure loss is set across the inlet.

2. The tooth cleaning system according to claim 1, wherein the inlet comprises an inlet nozzle and an aperture, and wherein the aperture has an inlet throttle cross-section, which determines the flow resistance of the inlet.

3. The tooth cleaning system according to claim 1, wherein the flow resistance of the outlet is determined by a reference throttle cross-section, and wherein the reference throttle cross-section is an outlet throttle cross-section of the outlet and/or a throttle cross-section of the pipe system.

4. The tooth cleaning system according to claim 2, wherein the inlet throttle cross section is less than or equal to the reference throttle cross section.

5. The tooth cleaning system according to claim 2, wherein the inlet comprises a duckbill check valve/lip check valve, arranged between the aperture and the inlet nozzle.

6. The tooth cleaning system according to claim 2, wherein the inlet comprises a first adjusting device which is configured to regulate the pressure loss, by means of an adjustment of the inlet throttle cross-section.

7. The tooth cleaning system according to claim 2, wherein the aperture is configured to be interchangeable.

8. The tooth cleaning system according to claim 1, wherein the inlet is formed as an insert which is interchangeably configured, and wherein the insert is preferably a bottom element of the powder container.

9. The tooth cleaning system according to claim 8, wherein the insert and/or aperture is configured to inform about or to indicate a pressure loss level, by pattern and/or colour coding or dimensioning of the insert.

10. The tooth cleaning system according to claim 3, wherein the reference throttle cross-section is adjustable by a second adjustment unit.

11. The tooth cleaning system according to claim 3, wherein the reference throttle cross section is adjustable by replacing one or more nozzles.

12. A powder container, in particular for a tooth cleaning system according to claim 1, having an inlet for a fluid for compressed air, wherein an inlet throttle cross-section of the inlet is adjustable.

13. An insert for a powder container according to claim 12, wherein the insert comprises the inlet.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Further advantages and characteristics result from the following description of a preferred embodiment, in particular a powder container, in relation to the attached figures.

[0035] Show it:

[0036] FIG. 1: a sectional view of a preferred embodiment of a powder container;

[0037] FIGS. 2 and 3: partial views, as sketched in FIG. 1, with inlets generating different flow resistances.

DETAILED DESCRIPTION

[0038] FIG. 1 shows in a sectional view a powder container 10 comprising a wall 16 within which a powder chamber 11 configured as an insert is arranged. At its lower end the powder container 10 has a base element 12, at its upper end a cover element 14. Inside the powder chamber 11 a Venturi tube 80 is arranged. Not shown is a powder which is inside the powder chamber 11. The vertical arrow pointing in the direction of the powder container 10, marked with the reference sign S, indicates a flow direction, in particular an inlet flow direction of (compressed) air. The powder container 10 also contains an outlet pipe 44 forming an outlet 40, through which a powder/air mixture formed within the powder chamber 11 is discharged. Here, also, an arrow pointing downwards with the reference sign S indicates in this case a flow direction, in particular an outlet flow direction. In this example, the powder container 10 comprises two outlet throttle cross-sections 42, 42′. The two outlet throttle cross-sections 42, 42′ can represent a reference throttle cross-section. Optionally, however, only the smaller of the two outlet throttle cross-sections 42, 42′ represents the reference throttle cross-section. The decisive factor is the interaction of the reference throttle cross-section with the form or dimensioning of the inlet 20. The reference throttle cross-section can also be determined by a pipe system not shown here. The dotted area of the powder container 10, which includes inlet 20, is shown in detail in FIGS. 2 and 3.

[0039] FIG. 2 shows the area sketched in FIG. 1 in a detailed illustration. The bottom element 12 in particular can be seen, in which an insert 18 is arranged, which comprises an inlet nozzle 22, whereby a duckbill check valve or a lip check valve 60 is arranged in front of the inlet nozzle 22 as seen in the direction of flow S. In front of this in turn is an aperture 24, which has an inlet throttle cross-section of 26. In the embodiment shown here, the aperture plate 24 is configured as part of a tube insert 28, which may be interchangeable.

[0040] With reference to FIG. 3, it can be clearly seen that an inlet throttle cross-section 26 shown there is considerably larger. The figures do not differ from each other, so that no further explanations are given.

[0041] It can clearly be seen that the duckbill check valve or the lip check valve 60 is arranged in such a way that it can be opened by a pressure, in particular an air pressure, along the direction of flow S. The valve can be opened by means of a pressure, in particular an air pressure. If no pressure is applied, the duckbill check valve or the lip check valve 60 is automatically closed and no more powder can escape via the inlet nozzle 22. In the design shown in FIGS. 1 to 3, the insert 18 is even formed in multi-part, in particular in two-part, and sealed against each other and against the powder chamber 11 by means of corresponding sealing elements, cf. the 0-rings not specified here in more detail. The floor element 12 has a corresponding geometry for arrangement at a station/(basic) device not shown here, via which the air pressure can be introduced into the powder container 10 and the powder/air mixture discharged. The outlet throttle cross-sections 42 and 42′ shown in FIG. 1 are given as possible reference throttle cross-sections. However, a reference throttle cross-section can also, as mentioned above, be formed in a pipe system not shown here, which is located in the station or in the line to the handpiece or in the handpiece itself.