Dental spray syringe
OwnerDaniel H. Martin, Todd E. Davisinventors
Life of this patent
Estimating the term…
Abstract
A dental syringe is disclosed wherein finger actuated shutoff valves control air and water flows to a discharge nozzle. The shutoff valves are constructed with a groove into which the media inlet barb is inserted for retention. All O-rings are retained below the surface of the syringe head. The discharge nozzle is constructed with a retaining groove and retained with a snap ring.
Claims11
In a dental instrument assembly comprising an instrument body with at least one shutoff valve therein and a passageway constructed in said instrument body providing media flows to said valve;
- and valve constructed with an exterior cavity into which a retaining component within said passageway extends to fixedly hold said valve against undesired movement.
In a dental instrument assembly having an instrument body with at least one media passageway, a cylindrical cavity at the distal end of said passageway;
- and a nozzle retention assembly attached to the cylindrical cavity;
- wherein the improvement comprises an annular axial groove at the distal end of the cylindrical cavity, whereby an annular sealing member seated within said annular groove provides a seal between the instrument body and the nozzle retention assembly to prevent media leakage.
A dental instrument assembly comprising a nozzle and a nozzle retention system comprising:
- a) a hollow nozzle retention adapter constructed with at least one interior groove;
- b) a snap ring located within said groove to exert pressure upon the nozzle whenever the nozzle is connected with said adapter;
- and
- c) connection means for attaching said adapter to an instrument body.
Dependencies are inferred from the claim text.