Patent ID: 6578608
Filing Date: 2003-06-17
Classification: F16L,Y10S

Abstract:
A pipe construction kit comprising:a first and a second pipe section (1, 2) of plastic material, each of which having; a smooth-walled cylindrical internal pipe (3) and a corrugated external pipe (4) with annular cylindrical elevations (5) that have a spacing T5 and troughs (8), and an outside diameter D4; a socket (10), which is in-line molded on one end of the first pipe section (1), having; an outside diameter D18, an inside diameter D17, and a radial height H18; and a spigot (21), which is in-line molded on an end of the second pipe section (2), the spigot having; the internal pipe (3) and a second external pipe section (22) with annular cylindrical elevations (23) of a radial height H22 and of a spacing T23, and having an outside diameter D22, wherein the outside diameter D22 is substantially the same as the inside diameter D17 of the socket (10); wherein the socket (10) is a twin-wall pipe having a smooth-walled internal pipe section (17) and a corrugated first external pipe section (18) with elevations (19) of a spacing T19 and troughs (20),wherein the outside diameter D4 of the external pipe (4) is substantially the same as the outside diameter D18 of the socket (10) and wherein the formula of 0.3(the radial height H18+the radial height H22)&lE;the radial height H18&lE;0.7(the radial height H18+the radial height H22) applies to the determination of the radial height H18 of the socket (10) in relation to the radial height H22 of the spigot (21).