Pipes and tubular conduits – Combined – With trench
Reexamination Certificate
2005-02-08
2005-02-08
Hook, James (Department: 3752)
Pipes and tubular conduits
Combined
With trench
C138S110000, C138S106000, C220S902000, C206S443000, C206S584000, C206S523000
Reexamination Certificate
active
06851454
ABSTRACT:
The combination of a flexible pipe, e.g. plastic, and a reinforcing member mounted around the pipe to strengthen the pipe and to enhance its ability to resist deformation under load. In one embodiment the reinforcing member includes a flexible perforated plastic netting containing an aggregation of lightweight elements such as expanded polystyrene beads capable of wrapping around the pipe, preferably in helical fashion along the length of the pipe. In another embodiment, a number of members are mounted on the pipe in longitudinally extending fashion. In all embodiments, the beads provide drainage around the pipe when it is placed in a trench and obviate the need for gravel normally used in conventional systems. In another form of the invention, a drainage system is constructed by digging a trench, placing a reinforcing aggregate member in the corners at the bottom of the trench, and setting a large diameter cylindrical pipe in the trench. The aggregate members generally conform to and almost fill the open areas around the bottom of the pipe to support the pipe and prevent deformation thereof under load.
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Hook James
Ring Industrial Group, L.P.
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