Importance

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Abstract

Dispensing assembly for dispensing two liquid components, comprising an outer piston pump concentric with an inner piston pump provided with resetting means, in which the inlet and outlet of the piston chambers comprise pre-tensioned non-return valves, in which the inner piston has a small free stroke relative to the other parts of the assembly, a stationary stroke limiting part with a stop is present in the outer piston chamber of the outer piston pump, which stroke limiting part under friction can interact with a stop on the inner piston, in order to limit the movement distance thereof and permit the movement thereof only under friction, and the outer piston and the inner piston comprise carrier bevelled collars which can interact in a sealing manner with each other and form an active non-return valve for the outlet of the outer piston chamber.

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First Claim