Abstract: A quick-action coupling for coupling pipes includes a tubular inner part having an outer surface for supporting a pipe to be coupled; an inner sleeve and a clamping ring, each surrounding at least a portion of the tubular inner part for clamping the pipe to be coupled between the outer surface of the tubular inner part and the clamping ring; a toothed ring between the inner sleeve and the clamping ring; and an outer sleeve surrounding at least a portion of the inner sleeve, the toothed ring and the clamping ring, the outer sleeve comprises a cylindrical region having at least two inside diameters (d1, d2) and a conical region, wherein the clamping ring is received in the conical region.

Abstract: The invention relates to a quick-release coupling (1) for pipelines (20) comprising pipe connecting elements (10). Said coupling comprises an inner part (2), an outer sleeve (4), and an inner sleeve (3) comprising a toothed ring (6) and a clamping ring (5). The inner sleeve (3) consists of at least two parts (31) and (32).