Importance

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Abstract

The manually operated dispensing device for a double dispensing cartridge comprises a double thrust ram having a toothing and a drive means which is actuated by a trigger lever and which jointly acts on the double thrust ram, this drive means having a drive member which acts via a toothing on the toothing of the double thrust ram, an arc compensating element being arranged between the drive member and the trigger lever. The drive member is guided in such a manner that it is able to make a linear motion during its advance stroke but no swivelling or tilting motion but can make a swivelling motion for disengaging the double thrust ram or for the return stroke movement of the drive member, the arc compensating element for the trigger lever being a compensating link, pivotably connected at its one end to the trigger lever above its fulcrum by a first fulcrum pin and at its other end to the drive member by a second fulcrum pin. Due to the absence of relative motions between the teeth during the advance motion as well as achieving favorable force impact points, thus avoiding undue jamming and tilting moments, resulting in decreased frictional losses, the device has a high mechanical efficiency and optimizes the dispensing volume per stroke in one of its versions.

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First Claim