초록 ▼

A dual pipe installation comprising a sump including a wall having inner and outer surfaces, and an opening extending there between, a pipe assembly extending into the sump and comprising an outer flexible pipe extending lengthwise and being defined by an endless wall which includes a plurality of c

A dual pipe installation comprising a sump including a wall having inner and outer surfaces, and an opening extending there between, a pipe assembly extending into the sump and comprising an outer flexible pipe extending lengthwise and being defined by an endless wall which includes a plurality of corrugations in serially adjacent lengthwise relation, and a lengthwise inwardly open channel, and an inner flexible pipe which extends within the outer pipe, which is defined by an endless wall defining an interior and including a plurality of corrugations in serially adjacent lengthwise relation, and a projecting end portion extending axially outwardly beyond the end of the outer pipe and having an outer end, and which defines, with the outer pipe, an annular space.

대표청구항 ▼

A composite pipe assembly comprising an inner flexible pipe extending lengthwise and being defined by a wall which includes a plurality of corrugations in serially adjacent lengthwise relation, and an outer flexible pipe which is spaced outwardly from said inner pipe and forms an enclosure for said

A composite pipe assembly comprising an inner flexible pipe extending lengthwise and being defined by a wall which includes a plurality of corrugations in serially adjacent lengthwise relation, and an outer flexible pipe which is spaced outwardly from said inner pipe and forms an enclosure for said inner pipe, and which is defined by a wall including a lengthwise inwardly open channel restricting flexibility in one direction, and a series of axially adjacent corrugations extending transversely to and from said lengthwise channel.