Pipes and tubular conduits – Spirally seamed
Reexamination Certificate
2011-07-12
2011-07-12
Brinson, Patrick F (Department: 3754)
Pipes and tubular conduits
Spirally seamed
C138S129000, C138S122000, C138S172000, C138S173000
Reexamination Certificate
active
07975728
ABSTRACT:
A composite strip10windable to form a helical pipe for transporting fluid is disclosed. The composite strip comprises: an elongate plastic strip11having a base portion12, the base portion12having an upper side defining an outer face15; and at least one lengthwise extending composite rib portion20upstanding from the outer face15of the base portion12. The rib portion20has a distal end23remote from the base portion12. The composite rib portion comprises: an elongate inboard reinforcing member30disposed within or adjacent to the base portion12; an elongate outboard reinforcing40member disposed within the distal end20of the rib portion20parallel to the inboard reinforcing member30; and an elongate intermediate plastic web23portion extending between the inboard and outboard reinforcing members30, 40. When wound into a helical pipe, the composite rib portion20reinforces the pipe against radial crushing loads.
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Harvey Steven David Gerald
Melville Shaun Thomas
Taylor John Gerard
Brinson Patrick F
Olson & Cepuritis, Ltd.
Sekisui Rib Loc Australia Pty Ltd.
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