Helically wound reinforced ribbed composite structure

Details Helically wound reinforced ribbed composite structure Helically wound reinforced ribbed composite structure

F - Mech Eng,Light,Heat,Weapons

16

L

F16L 11/16 (2006.01) F16L 9/16 (2006.01)

Patent

CA 2119035

A helically wound composite pipe produced by helically winding a plastics profiled strip (10) which has its adjacent edges interlocked, the strip (10) being provided with an array of lengthwise extending T-shaped ribs (15) spaced apart across its width, and an elongate helical reinforcing member (11) wound around the outside of the pipe and having its marginal edges interlocking with the flange formations (14) of a pair of ribs (15), the reinforcing member (11) having a central body portion of inverted U- or V-shaped cross section having a radial height greater than the height of the ribs (15) so as to substantially increase the effective external diameter of the pipe. Reinforcing members (31, 32) having a leg lockingly retained in a slot-like cavity (27) are also dis- closed. A method of producing a non-circular structure (40) from the wound pipe is disclosed.

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