Syringe dispenser

Abstract

A motor driven syringe dispenser which has a syringe mounting part, a slider, and a connection for an endodontic motor. The syringe dispenser connects to an endodontic motor which is used to drive a plunger of a syringe placed in the syringe mounting part thereby expressing irrigant into a root canal for root canal therapy.

What is claimed is: 
     
         1 . A syringe dispenser for expressing an irrigant from a syringe which has a plunger movably positioned inside a barrel, the syringe dispenser comprising:
 an upper housing and a lower housing;   a syringe mounting part disposed within the lower housing and configured to receive the barrel so that the syringe is mounted on the syringe mounting part;   a slider disposed within the lower housing, the slider having a plunger receiving portion configured to receive the plunger when the syringe is mounted on the syringe mounting part, and   a motor coupling disposed within the upper housing, the motor coupling configured engage a motor and to transfer an output of the motor to a threaded screw,   wherein, the slider is connected to (i) one or more guide rods which are configured to confine a movement of the slider to a predetermined path and to (ii) said threaded screw which is configured to be operated by the motor coupling such that the slider moves forwards and backwards and creates a corresponding forwards and backwards movement of plunger in order to express the irrigant from the syringe.   
     
     
         2 . The syringe dispenser of  claim 1 , wherein the motor is a standard endodontic motor. 
     
     
         3 . The syringe dispenser of  claim 1 , wherein the upper housing and the lower housing are made from a material selected from the group consisting of polypropylene, polyethylene, nylon, polycarbonate and acrylonitrile butadiene styrene. 
     
     
         4 . The syringe dispenser of  claim 1 , wherein the motor coupling includes a high gear and a low gear, the high gear being connected to the motor and the low gear being connected to the threaded screw, wherein a gear ratio between the high gear and the low gear is configured to produce a predetermined torque ratio for depressing a plunger of the syringe. 
     
     
         5 . The syringe dispenser of  claim 2 , wherein a foot pedal connected to the standard endodontic motor is used to activate and/or control movement of the slider. 
     
     
         6 . The syringe dispenser of  claim 1 , wherein the slider has a push button slide and wherein the push button slide is spring biased such that when the push button slide is depressed, the slider disengages from the threaded screw. 
     
     
         7 . A battery powered handheld syringe dispenser for expressing an irrigant from a syringe which has a plunger movably positioned inside a barrel, the syringe dispenser comprising:
 an upper housing and a lower housing;   a syringe mounting part disposed within the lower housing and configured to receive the barrel so that the syringe is mounted on the syringe mounting part;   a slider disposed within the lower housing, the slider having a plunger receiving portion configured to receive the plunger when the syringe is mounted on the syringe mounting part, and   a motor disposed within the upper housing, the motor coupling configured to transfer an output of said motor to a threaded screw.   wherein, the slider is connected to one or more guide rods which are configured to confine a movement of the slider to a predetermined path and the slider engages said threaded screw which is configured to be operated by the motor such that the slider moves forwards and backwards and creates a corresponding forwards and backwards movement of plunger in order to express the irrigant from the syringe, and   wherein the slider has a push button slide and wherein the push button slide is spring biased such that when the push button slide is depressed, the slider disengages from the threaded screw.   
     
     
         8 . The battery powered handheld syringe dispenser of  claim 7 , further comprising a controller having a circuit configured to control the motor. 
     
     
         9 . The battery powered handheld syringe dispenser of  claim 8 , wherein the controller is configured to receive a signal feedback from the motor and to stop the motor from advancing the slider when a torque on the motor exceeds a predefined limit. 
     
     
         10 . The battery powered handheld syringe dispenser of  claim 8 , wherein the controller is located inside and/or outside the syringe dispenser.