Dispensing Device

Abstract

In a dispensing device for extruding cartridges, with a piston rod and a preferably manually-driven feed mechanism, whereby the feed mechanism has an operating lever, that is moved against a holding lever for squeezing in an extrusion direction (A), and a retaining mechanism that engages with the piston rod to prevent movement of the piston rod against the feed direction (R), it is envisaged that an unlocking mechanism is provided that engages with the retaining mechanism and releases this, whereby the unlocking mechanism may be so selectively coupled with the operating lever that a movement of the operating lever in the extrusion direction (A) releases the retaining mechanism.

1 . A dispensing device for extruding cartridges, said dispensing device including:
 a piston rod;   a feed mechanism, whereby said feed mechanism has an operating lever that may be moved against a holding lever to press in a pressing direction, and with a retaining mechanism that may engage with the piston rod in order to prevent movement of the piston rod against a feed direction; and   an unlocking mechanism that engages with said retaining mechanism and releases it, whereby the unlocking mechanism may be selectively coupled with the operating lever that a movement of the operating lever in the extrusion direction causes the retaining mechanism to be released.   
     
     
         2 . The dispensing device of  claim 1  wherein said feed mechanism is a manually-driven feed mechanism. 
     
     
         3 . The dispensing device of  claim 1  wherein the unlocking mechanism has an actuating element which is mounted on the operating lever and that couples the operating lever with the retaining mechanism, and in an unlocking position while in a deactivated position it separates the operating lever from the retaining mechanism. 
     
     
         4 . The dispensing device of  claim 3  wherein the actuating element on the holding lever is provided on the opposite side of the operating lever, wherein the actuating element in the deactivated position is flush with a surface of the operating lever and protrudes in the unlocking position of the said surface. 
     
     
         5 . The dispensing device of  claim 3  wherein the unlocking mechanism has a coupling rod, which is positively coupled with the operating lever in the unlocking position of the actuating element. 
     
     
         6 . The dispensing device of  claim 4  wherein the unlocking mechanism has a coupling rod, which is positively coupled with the operating lever in the unlocking position of the actuating element. 
     
     
         7 . The dispensing device of  claim 5  wherein the coupling rod with one end is pivotally coupled with the retaining mechanism and is supported at the other end by a guide slot on the control lever. 
     
     
         8 . The dispensing device of  claim 6  wherein the coupling rod with one end is pivotally coupled with the retaining mechanism and is supported at the other end by a guide slot on the control lever. 
     
     
         9 . The dispensing device of  claim 7  wherein in the unlocking position, the actuating element couples the coupling rod with the guide slot. 
     
     
         10 . The dispensing device of  claim 8  wherein in the unlocking position, the actuating element couples the coupling rod with the guide slot. 
     
     
         11 . The dispensing device of  claim 1  wherein the retaining mechanism has a clamping plate that may be tilted with respect to the piston rod. 
     
     
         12 . The dispensing device of  claim 1  wherein the feed mechanism has a drive pulley which is supported on the piston rod and is tilted on this to move the piston rod in the feed direction. 
     
     
         13 . The dispensing device of  claim 1  wherein, upon actuation of the unlocking mechanism, this releases the retaining mechanism by a movement of the operating lever before a positive connection is established between the feed mechanism and the piston rod. 
     
     
         14 . The dispensing device of  claim 1  wherein the unlocking mechanism is deactivated upon actuation of the feed mechanism.