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RU-2861546-C2 - DISPENSING GUN, SYSTEM (DEVICE), METHOD FOR DISPENSING MATERIAL

RU2861546C2RU 2861546 C2RU2861546 C2RU 2861546C2RU-2861546-C2

Abstract

FIELD: technology. SUBSTANCE: invention relates to a dispensing gun (or dispenser) for a cartridge. In particular, the dispensing gun of the present invention is particularly suitable for dispensing a paste-like material contained in a cartridge. The present invention also relates to the use of the dispensing gun in medicine, particularly in dentistry or orthopaedics. A dispensing gun for dispensing a paste-like material, comprising a frame with a handle, an injection breech for attaching a cartridge, wherein the injection breech is located in the distal part of the frame, a lever with at least two teeth and a plunger with at least two recesses, comprises means for directly fixing the cartridge on the injection breech and means for moving the plunger inside the cartridge such that the material contained in the cartridge is extruded in a single stroke of the plunger. The dispensing gun is configured such that the lever has an actuated state in which the first recess of the plunger and the first tooth of the lever engage before the cartridge is attached, so that the lever and the handle form an angle in the range of from 80° to 120°. The injection breech comprises a distal plate with an opening, the shape of which corresponds to the shape of the base portion of a cartridge having two opposite locking wings, so as to allow the cartridge to be inserted into the injection breech of the dispensing gun, wherein the injection breech also comprises means for locking the cartridge after it is received inside the injection breech. A system for dispensing a paste-like material comprises the above-described dispensing gun for dispensing said paste-like material and a cartridge for storing said paste-like material, having a base portion with two opposite locking wings. A method for dispensing material with the above-described system comprising a cartridge having a base portion with at least two opposite locking wings, and the above-described dispensing gun, wherein the injection breech includes a distal plate with an opening, the shape of which corresponds to the shape of the base portion of the cartridge. In a first step of the method, the dispensing gun is actuated by a pulling force applied to the lever, the lever is set to an actuated state in which the first recess of the plunger and the first tooth of the lever engage before the cartridge is attached, so that the lever and the handle form an angle from 80° to 120°, and so that the plunger inside the frame is at a non-zero distance ex from the distal end of the injection breech. In a second step of the method, the base portion of the cartridge containing the material to be dispensed is fixed to the distal part of the injection breech. In a third step of the method, the plunger of the dispensing gun is moved to a position ready for use for extruding the material contained in the cartridge. In a fourth step of the method, the material contained in the cartridge is dispensed by a pulling force applied to the lever until the lever is depressed, the plunger is moved inside the cartridge so that all of the material is completely extruded. EFFECT: ensuring correct positioning of the cartridge on the dispensing gun and a reliable connection between the cartridge and the dispensing gun, ensuring safe handling when the specialist works with the dispensing gun. 15 cl, 9 dwg

Inventors

  • MARI, Olive
  • KO, Klemens
  • RICHARD, Zhil
  • DESHEPPER, Mikael

Dates

Publication Date
20260505
Application Date
20220121
Priority Date
20210121

Claims (20)

  1. 1. A dispensing gun (1) for feeding a paste-like material, comprising a frame (2) with a handle (21), an injection valve (22) for attaching a cartridge, wherein the injection valve (22) is located in the distal part of the frame (2), a lever (3) with at least two teeth (31) and a piston (4) with at least two recesses (41), wherein:
  2. - the dispensing gun (1) contains means for directly fixing the cartridge on the injection valve (22); and
  3. - the dispensing gun (1) comprises means for moving the piston (4) into the cartridge in such a way that the material contained in the cartridge is extruded in one stroke of the piston; and
  4. - the dispensing gun (1) is configured in such a way that the lever (3) has an actuation state in which the first recess (41) of the piston (4) and the first tooth (31) of the lever (3) engage before the cartridge is attached, so that the lever (3) and the handle (21) form an angle in the range from 80° to 120°,
  5. and said injection stopper (22) comprises a distal plate (221) with an opening (222), the shape of which corresponds to the shape of the base part of the cartridge, having two opposite locking wings, to ensure the insertion of the cartridge into the injection stopper (22) of the dispensing gun (1), wherein the injection stopper (22) also comprises means for fixing the cartridge after it is received inside the injection stopper.
  6. 2. The dispensing gun according to claim 1, configured in such a way that the lever (3) also has a final state in which the lever (3) is depressed and the piston (4) of the dispensing gun is engaged with the cartridge, thus ensuring complete extrusion of the material initially contained in the cartridge.
  7. 3. The dispensing gun according to claims 1 and 2, configured in such a way that the lever (3) further includes an intermediate state in which the lever (3) is maintained in a position between the actuation state and the final state for contact of the piston (4) with the piston of the cartridge so that the dispensing gun is ready for use for extruding the material contained in the cartridge.
  8. 4. A dispensing gun according to any one of paragraphs 1-3, wherein the injection valve (22) comprises means for directly locking the outer sleeve (7) of the cartridge (6) by means of its two locking wings (77).
  9. 5. A dispensing gun according to any one of claims 1-4, wherein the piston (4) is a rod configured to be received into the internal volume of the cartridge when fixed on the distal part of the injection valve (22).
  10. 6. A dispensing gun according to any one of paragraphs 1-5, characterized in that turning the lever (3) from the actuated state to the final state moves the piston (4) in the range from 10 mm to 20 mm.
  11. 7. A dispensing gun according to any one of paragraphs 1-6, characterized in that, when the lever (3) is in the actuated state, the distal end of the internal piston (4) is located on the proximal end of the injection valve (22).
  12. 8. A dispensing gun according to any one of paragraphs 1-7, characterized in that the frame (2) includes one rib.
  13. 9. The dispensing gun according to paragraph 8, characterized in that the dispensing gun includes a washer located behind the edge of the frame.
  14. 10. A dispensing gun according to any one of paragraphs 3-9, characterized in that when the lever (3) is in an intermediate state, the lever (3) is maintained in a position between the actuation state and the final state by a spring-loaded plunger.
  15. 11. The dispensing gun according to claim 4, wherein the injection shutter (22) includes a proximal part configured to connect with the distal end of the frame (2), and a distal part configured to connect and lock two opposite locking wings of the base part of the cartridge.
  16. 12. A dispensing gun according to any one of paragraphs 1-11, wherein the frame (2) is made of a polymer obtained by injection molding, and the injection valve (22) is made of metal.
  17. 13. A dispensing gun according to any one of paragraphs 1-12, characterized in that the dispensing gun is capable of withstanding autoclave processing and/or is deactivatable.
  18. 14. A system for dispensing a pasty material, comprising a dispensing gun (1) for dispensing said pasty material according to any one of paragraphs 1-13 and a cartridge (6) for storing said pasty material, having a base part with two opposite stop wings (77).
  19. 15. A method for dispensing material using a system according to claim 14, comprising a cartridge (6) having a base portion with at least two opposing locking wings (77), and a dispensing gun (1) according to any one of claims 1-13, in which the injection valve (22) includes a distal plate (221) with an opening (222), the shape of which corresponds to the shape of the base portion of the cartridge (6), and said method includes the steps of:
  20. - at the first stage of actuating the dispensing gun (1), under the action of the traction force applied to the lever (3), the lever is set in the actuation state, in which the first recess (41) of the piston (4) and the first tooth (31) of the lever (3) before attaching the cartridge (6) engage, so that the lever (3) and the handle (21) form an angle from 80° to 120°, and so that the piston (4) inside the frame (2) is at a non-zero distance e x from the distal end of the injection valve (22);

Description

FIELD OF TECHNOLOGY TO WHICH THE INVENTION RELATES The present invention relates to a dispensing gun (or dispenser) for a cartridge. In particular, the dispensing gun of the present invention is advantageously suitable for dispensing a paste-like material contained in a cartridge. The present invention also relates to the use of the dispensing gun in medicine, particularly in dentistry or orthopedics. PRIOR ART Cartridges designed for mixing and dispensing materials are particularly useful for dental filling applications, allowing for the mixing of multi-component dental filling materials and their application to the patient's teeth. Typically, dental filling materials consist of powder and liquid components, which are mixed to form dental cement. Specifically, cartridges have been developed for dental filling applications in which a predetermined amount of the powder and liquid components is pre-weighed and placed in isolated chambers to prevent accidental mixing of the two components. In such cartridges, the components are released from the isolated chambers at the required time and mechanically mixed together to form dental cement, which is then dispensed from the cartridge. Dispensing the material contained in a cartridge typically requires a dispensing device. Specifically, several dispensing guns have been developed in the dental field for dispensing dental material contained in a cartridge. For example, WO 95/00078 discloses a dispensing gun with a cartridge holder that accommodates the cartridge. WO 95/00078 lacks means for securing the cartridge to the dispensing gun, so the dispensing gun described in WO 95/00078 cannot guarantee safe handling by a practitioner. Other dispensing devices, such as those disclosed in US 2018/0185117, require the physician to repeatedly press the device's lever to dispense the material contained in the cartridge. Such dispensing devices are not ergonomic and often fail to dispense the entire volume of material. The present invention aims to address these shortcomings by offering a dispensing gun for dispensing material from a cartridge. It is easy to use and simultaneously improves material dispensing reliability, specifically by reducing the risk of material loss. Furthermore, the dispensing gun allows the entire cartridge to be dispensed in a single stroke of the dispensing gun's piston. SUMMARY OF THE INVENTION For this purpose, the subject of the invention is a cartridge dispenser gun comprising a frame with a handle, a shutter for attaching a cartridge, preferably a cartridge having a base portion with at least two opposing locking wings, wherein the shutter is located in the distal portion of the frame, a lever consisting of at least two teeth, and a piston (also called a pistol piston) consisting of at least two cutouts, wherein: - the dispensing gun contains means for directly fixing the cartridge to the injection valve; and - the dispensing gun comprises means for moving the piston of the gun into the cartridge in such a way that the material contained in the cartridge is extruded in one stroke of the piston; and - the dispensing gun is configured in such a way that the lever is in a state in which the first recess of the pistol piston and the first tooth of the lever are engaged before the cartridge is attached, so that the lever and the handle form an angle in the range from 80° to 120°, preferably 90°. As used herein, the terms "proximal" and "distal" refer to the position of the parts of the dispensing gun relative to the operator (e.g., the dentist), i.e., the term "proximal" refers to the position closer to the operator of the cartridge, and the term "distal" refers to the position further from the operator. According to one embodiment of the invention, the dispensing gun is configured such that the lever further includes a final position in which the lever is depressed and the piston of the dispensing gun engages the cartridge, so that the material originally contained in the cartridge is completely extruded. Thus, the material is dispensed while limiting material loss. According to one embodiment of the invention, the dispensing gun is configured such that the lever further includes an intermediate state, in which the lever is in a position between the actuation state and the final state, so that the dispensing gun is ready for use to extrude the material contained in the cartridge connected to the gun. In a preferred embodiment of the invention, in the intermediate state, when the cartridge connected to the gun contains a piston, the piston of the gun should be located near the piston of the cartridge. In the present invention, the term "close to" refers to the relative position of two elements (for example, the relative position of the piston of the gun to the piston of the cartridge), separated from each other by a distance of less than 10 mm, preferably less than 9, 8, 7, 6, 5, 4, 3, 2, or 1 mm. According to one embodiment of the invention, the te