| 摘要 |
1. Mercury portions dispenser for dental amalgams production, comprising a sliding piece (9, 10, 11 ; 10', 11') which is translationally movable in a bore (12a ; 12a') between a loading position and a dispensing position, the sliding piece including two parts (9, 10 and 11, respectively ; 10' and 11', respectively) for forming a dosing cavity (10a-11a ; 10a'-11a') and which are movable with respect to each other, the cavity being aligned, in the loading position, with an inlet (16) which opens laterally into the bore (12a ; 12a') and in the dispensing position with an outlet (19) which opens laterally out of the bore (12a ; 12a'), characterized in that the two parts (9, 10 and 11, respectively ; 10' and 11', respectively) of the sliding piece are arranged to be movable relative to one another in such manner that each time at the beginning of the translational movement from the loading position toward the dispensing position a first one (11 ; 11') of the two parts of the sliding piece (9, 10, 11 ; 10', 11') remains stationary in the bore (12a ; 12a') until the volume of the dosing cavity (10a-11a ; 10a'-11a') which is in communication with the inlet (16) is increased to a maximum value, whereupon the two parts (9, 10 and 11, respectively ; 10' and 11', respectively) perform the further translational movement to the dispensing position together, and that each time at the beginning of the translational movement from the dispensing position toward the loading position the first part (11 ; 11') again remains stationary in the bore (12a ; 12a') until the volume of the dosing cavity (10a-11a ; 10a'-11a') which is in communication with the outlet (19) is decreased to a minimum value, whereupon the two parts (9, 10 and 11, respectively ; 10' and 11', respectively) perform the further translational movement to the loading position together. |
