# US 2014/0197195 A1 · Device for dispensing a dental substance and method of dispensing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197195 A1 - Document ID: US20140197195A1 - Status: Published application - Kind: A1 - Application number: 14/235,139 - Filed: 2012-07-27 - Published: 2014-07-17 - Earliest claimed: 2011-07-28 - Assignees: 3M Innovative Properties Company - Inventors: Marc Peuker; Helmut Pauser; Mathias Bertl; Olaf Althoff - Web page: https://patentgrep.com/patent/US20140197195A1 ## CPC - A61C 9/0026: {Syringes or guns for injecting impression material; Mixing impression material for immediate use} - B05C 17/0052: {Accessories therefor} - B05C 17/00576: {characterised by the construction of a piston as pressure exerting means, or of the co-operating container} - B05C 17/0116: {characterised by the piston driving means (B05C17/0103, B05C17/0109, B05C17/0113, B05C17/015 take precedence)} - B05C 17/0133: {Nut and bolt advancing mechanism, e.g. threaded piston rods} - B65D 81/325: {Containers having parallel or coaxial compartments, provided with a piston or a movable bottom for discharging contents} - B65D 83/762: the contents being forced out through an internal passage in the screw-shaft - B05C 17/00583: {the container for the material to be dispensed being deformable} - A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00) - B05C: APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (spraying apparatus, atomising apparatus, nozzles B05B; plant for applying liquids or other fluent materials to objects by electrostatic spraying B05B5/08) - B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES ## Abstract Provided is a device (10) for dispensing a dental substance. The device (10) comprises a cartridge (11) for containing the dental substance. The cartridge (11) has a plunger (20), and a dispensing opening (13). Further the device (10) is operable to urge the dental substance toward the dispensing opening (13). The device further comprises a cutter (31) for cutting off a portion of the dental substance which protrudes over the dispensing opening (13). The device may particularly facilitate precise dispensation of a high viscosity dental substance. ## Claims ### Claim 1 A device for dispensing a dental substance, comprising a cartridge for containing the dental substance and a plunger, the cartridge comprising a dispensing opening, the device comprising a screw mechanism which is operable to urge the dental substance toward the dispensing opening, the device further comprising a closure being adapted to openably close the dispensing opening, and wherein the closure comprises a cutter for cutting off a portion of the dental substance which protrudes over the dispensing opening, wherein the closure has a closure wall through which an orifice extends, the closure and the cartridge being movable relative to each other between a closed position in which the closure wall covers the dispensing opening and an open position in which the dispensing opening and the orifice overlap at least partially, and the device being adapted to provide an indication of a predetermined amount of dental substance being dispensed, wherein the indication comprises an audible click provided by a ratchet permitting relative rotation of the plunger and the cartridge in a dispensing direction and restricting rotation in the opposite direction, and wherein the rotation in the opposite direction of the dispensing direction is enabled at a predetermined extent. ### Claim 2 (depends on 1) The device of claim 1, wherein the closure forms or comprises a handle by which the closure can be held and operated by a user of the device. ### Claim 3 (canceled) ### Claim 4 (depends on 1) The device of claim 1, wherein the closure wall forms a circumferential cutting edge delimiting the orifice. ### Claim 5 (depends on 4) The device of claim 4, wherein the cartridge has an outward convex cartridge end face through which the dispensing opening extends, the cartridge end face generally corresponds in shape to a portion of an imaginary sphere, and wherein the cutting edge extends along a line on the same imaginary sphere. ### Claim 6 (depends on 1) The device of claim 1, wherein the dispensing opening and the orifice have generally circular cross-sections of generally equal diameters. ### Claim 7 (depends on 1) The device of claim 1, wherein the closure forms a slide valve or a rotary slide valve. ### Claim 8 (depends on 1) The device of claim 1, comprising at least a component of a type 0 dental impression material. ### Claim 9 (depends on 1) The device of claim 1, wherein the plunger is threaded and forms part of the screw mechanism. ### Claim 10 (canceled) ### Claim 11 (canceled) ### Claim 12 (depends on 1) The device of claim 1, wherein the cartridge is adapted for containing two dental substances separate from each other, the cartridge further having a further dispensing opening, and wherein the closure has a further orifice for opening the further dispensing opening in the open position of the closure. ### Claim 13 (canceled) ### Claim at position 14 14-15. (canceled)