Multibore conduit

Claim 1

An elongated lightweight injection molded plastic conduit section with male and female ends comprising: an enclosing wall means of given thickness having first and second pairs of generally flat parallel walls having adjacent ends interconnected by integral radial portions to define an elongated smooth surfaced, generally planar rectangular passage therein with partition wall means integral with said enclosing wall means to divide said passage into a plurality of elongated passageways, a plurality of longitudinally spaced transversely continuous reinforcing ribs extending outwardly from a peripheral surface of said enclosing wall means, said ribs extending completely around the periphery of said enclosing wall means, a plurality of transversely extending ridges extending outwardly from the peripheral surface each of said parallel walls, said ridges being spaced from one another and from said ribs and said ridges being parallel to said ribs and to one another with at least two elongated ridges on each wall between adjacent pairs of ribs, said ridges each having an elongated dimension less than the dimension between opposite edges of an associated wall with all of said ridges terminating in common planes extending generally parallel to said passageways and spaced from said radial portions, each of said ridges having a substantially constant height and cross-section throughout a major portion of the length thereof, each of said ribs having a constant height throughtout the length thereof with the height of said ribs being substantially greater than the height of said ridges, the enclosing wall means between said ribs and said ridges being flat and having said given thickness dimension.