Patent ID: 9283060
Filing Date: 2016-03-15
CPC Classification: A61C,B05C,B65D

Claim Text:
1. A device for dispensing a dental substance, the device comprising: a cartridge for containing the dental substance and a plunger, the cartridge comprising a dispensing opening, a screw mechanism which is operable to urge the dental substance toward the dispensing opening of the cartridge, a closure being adapted to openably close the dispensing opening, 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, wherein the ratchet comprises a pawl and a complementary groove, wherein the pawl cooperates with the complementary groove to enable rotation in the opposite direction of the dispensing direction, while the pawl and the complementary groove are engaged, over a predetermined distance, to cause the closure and the cartridge to move relative to each other to the closed position.