Back to results
US 2022/0022998 A1Published application
Dispensing Device for Dental Retraction Material
Assignee3M Innovative Properties Company
InventorHelmut Pauser
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
Assignee3M Innovative Properties Company
InventorHelmut Pauser
Estimating the term…
A dispensing device for dental retraction material. The dispensing device has a cannula that forms a free front end. The free front end is formed by a first cannula portion and a second cannula portion that is arranged directly adjacent the first cannula portion. The first cannula portion has a first elongated section and a first rounded section. The second cannula portion has a second elongated section and a second rounded section. A first outer diameter (D1) of the cannula is defined on the first rounded section at the free front end, and a second outer diameter (D2) of the cannula is defined on the second rounded section at the transition between the second rounded section and the first cannula portion. The second outer diameter is greater than the first outer diameter. The first cannula portion comprises a predetermined separation structure directly adjacent the second cannula portion. The first cannula portion can be broken or cut off to provide the dispensing device with a new free front end.
A dispensing device for dental retraction material, comprising a cannula forming a free front end, the free front end being formed by a first cannula portion that extends from the free front end to a second cannula portion that is arranged directly adjacent the first cannula portion, wherein the first cannula portion has a first elongated section and a first rounded section extending between the first elongated section and the free front end, a first outer diameter (D1) of the cannula being defined on the first rounded section at the free front end, wherein the second cannula portion has a second elongated section and a second rounded section extending between the second elongated section and the first cannula portion, a second outer diameter (D2) of the cannula being defined on the second rounded section at the transition between the second rounded section and the first cannula portion, wherein the second outer diameter is greater than the first outer diameter, and wherein the first cannula portion comprises a predetermined separation structure directly adjacent the second cannula portion, wherein the predetermined separation structure is a groove.
(canceled)
A dispensing device for dental retraction material, comprising a cannula forming a free front end, the free front end being formed by a first cannula portion that extends from the free front end to a second cannula portion that is arranged directly adjacent the first cannula portion, wherein the first cannula portion has a first elongated section and a first rounded section extending between the first elongated section and the free front end, a first outer diameter (D1) of the cannula being defined on the first rounded section at the free front end, wherein the second cannula portion has a second elongated section and a second rounded section extending between the second elongated section and the first cannula portion, a second outer diameter (D2) of the cannula being defined on the second rounded section at the transition between the second rounded section and the first cannula portion, wherein the second outer diameter is greater than the first outer diameter, and wherein the first cannula portion comprises a predetermined separation structure directly adjacent the second cannula portion, wherein a channel extends through the cannula and forming a dispensing opening at the free front end, wherein the channel comprises a first channel section that has a first cylindrical channel section and a second channel section that has a second cylindrical channel section.
Dependencies are inferred from the claim text.