Flushing and aspirating device
A flushing and aspirating device includes a device housing with an aspirating channel, a flushing channel, a flushing and aspirating channel and a valve chamber in which the channels empty or emerge therefrom, respectively. A manually operable valve push button is movably guided in the valve chamber against the force of a reset spring and which has at least one sealing section for controlling the connection of the flushing and aspirating channel to the aspirating channel and/or the flushing channel. The valve push button including the at least one sealing section is formed as a single piece of an elastic rubber material, such as silicone.
1. A flushing and aspirating device, comprising:
a device housing comprising:
an aspirating channel;
a flushing channel;
a flushing and aspirating channel; and
a valve chamber in which the channels empty or emerge therefrom, respectively; and
a manually operable valve push button which is movably guided in the valve chamber against the force of a reset spring and which has at least one sealing section for controlling the connection of the flushing and aspirating channel to the aspirating channel and/or the flushing channel;
wherein the valve chamber is configured stepped, with a first valve chamber having a larger diameter, in which the aspirating channel and the flushing and aspirating channel empty or emerge therefrom, and with a second valve chamber having a smaller diameter, in which the flushing channel empties;
wherein the valve push button comprises an actuating section, a shaft and a middle section in between, relative to which the shaft is set back radially inwards;
wherein the middle section has at least one sealing section and the shaft has a sealing section, an outer diameter of the sealing section of the shaft being smaller than an outer diameter of the at least one sealing section of the middle section,
wherein the at least one sealing section of the middle section is guided and sealed in the first valve chamber and the sealing section of the shaft is guided and sealed in the second valve chamber;
wherein the valve push button including the sealing sections is formed as a single piece of an elastic rubber material;
wherein the sealing section of the shaft is formed as a radially outwardly projecting annular sealing lip as being part of the single piece, which blocks the connection of the flushing and aspirating channel to the flushing channel in a first valve position of the valve push button and releases it in a second valve position of the valve push button; and
wherein the at least one sealing section of the middle section is formed as a radially outwardly projecting annular sealing lip as being part of the single piece, which releases the connection of the flushing and aspirating channel to the aspirating channel in the first valve position of the valve push button and blocks it in the second valve position.
2. The flushing and aspirating device according to claim 1 , wherein the valve push button comprises a bore, which is open towards a housing bottom of the valve chamber, with a shoulder being a base of the bore, against which the reset spring is braced.
3. The flushing and aspirating device according to claim 1 , wherein a guiding projection rises up from a housing bottom of the valve chamber, on which both the valve push button and the reset spring are guided.
4. The flushing and aspirating device according to claim 3 , wherein the valve push button comprises a stepped blind bore, which is open towards a housing bottom of the valve chamber, having a smaller and a larger bore diameter and having a shoulder, against which the reset spring is braced, the smaller bore diameter corresponding to the diameter of the guiding projection and the larger bore diameter corresponding at least to the outer diameter of the reset spring.
5. The flushing and aspirating device according to claim 4 , wherein the shoulder is situated in a middle section or in an actuating section of the valve push button.