초록 ▼

A first molded polymer field drain panel is made from a moldable polymer sheet material and has an elongated chamber with an arched-shape, a first end, a second end and transverse strengthening ribs protruding outwardly therebetween. The elongated chamber has a smaller transverse strengthening end r

A first molded polymer field drain panel is made from a moldable polymer sheet material and has an elongated chamber with an arched-shape, a first end, a second end and transverse strengthening ribs protruding outwardly therebetween. The elongated chamber has a smaller transverse strengthening end rib, a transverse strengthening end rib and a smaller transverse strengthening intermediate rib. The smaller transverse strengthening end rib is molded at the first end shaped for being embracingly overlapped by a corresponding transverse strengthening end rib of a corresponding elongated chamber of a second molded polymer field drain panel. The transverse strengthening end rib is molded at the second end for overlapping a corresponding smaller transverse strengthening end rib of the corresponding elongated chamber of the second molded polymer field drain panel. The smaller transverse strengthening intermediate rib is molded between the first end and the second end of the first molded polymer field drain panel for being embracingly overlapped by the corresponding transverse strengthening end rib of the corresponding elongated chamber of the second molded polymer field drain panel upon severing removal of at least the transverse strengthening end rib that is molded at the second end of the first molded polymer field drain panel.

대표청구항 ▼

[ I claim:] [1.] A reversible interlocking field drain panel being made from a moldable polymer sheet material and having a first molded polymer field drain panel and means for forming an elongated chamber with an arched-shape, a first end, a second end and a plurality of transverse strengthening ri

[ I claim:] [1.] A reversible interlocking field drain panel being made from a moldable polymer sheet material and having a first molded polymer field drain panel and means for forming an elongated chamber with an arched-shape, a first end, a second end and a plurality of transverse strengthening ribs protruding outwardly therebetween, the means for forming the elongated chamber comprising:a smaller transverse strengthening end rib molded at the first end shaped for being embracingly overlapped by a corresponding transverse strengthening end rib of a corresponding elongated chamber of a second molded polymer field drain panel;a transverse strengthening end rib molded at the second end for overlapping a corresponding smaller transverse strengthening end rib of the corresponding elongated chamber of the second molded polymer field drain panel; anda smaller transverse strengthening intermediate rib molded between any two transverse strengthening ribs with respect to the first end and the second end of the first molded polymer field drain panel for being embracingly overlapped by the corresponding transverse strengthening end rib of the corresponding elongated chamber of the second field drain panel upon severing removal of at least the transverse strengthening end rib that is molded at the second end of the first molded polymer field drain panel.