Method for the advance of a plurality of rods, in particular for manually operated dispensing appliances

Abstract

A method for the advance of two or more rods against a resistance, as it is typically required in dispensing appliances for multiple component dispensing cartridges, consists in that thrust rods are seized by clamping levers in a traveller and then are advanced along with the traveller. The thrust rods extend through guides in traveller on both sides of the respective clamping lever as well as through a bore in the clamping lever. By a transmission of the advancing motion to the clamping levers, which is offset with respect to the bore, the latter are pivoted perpendicularly to the bore, whereby the thrust rods are clamped in the bores and are driven along. The clamping levers are arranged in such a manner that the torsional moments of the clamping action are essentially equal and opposed, whereby no torsional moment acts upon the traveller as a whole. Furthermore, clamping levers are provided in order to constantly seize both of the thrust rods as precisely simultaneously as possible, independently from manufacturing tolerances or wear. The method serves especially for advance of the thrust rods in manual dispensing appliances for dispensing cartridges, even for cartridges with mixing ratios which are far from 1:1.

Dependencies are inferred from the claim text.