Static molds – In situ construction engineering type or building type-mold... – Forming building structure
Patent
1994-05-20
2000-11-21
Mackey, James P.
Static molds
In situ construction engineering type or building type-mold...
Forming building structure
249177, 249184, 249186, B28B 728
Patent
active
061491217
ABSTRACT:
Apparatus for creating a sleeveless passage of controlled size and shape through a concrete wall poured in a form including two form plates mounted in fixed, spaced relation separated by a width W comprises a plurality of modular, one piece passage units, each unit including an annular main shell of external size and shape conforming to a segment of the sleeveless passage; each unit has end closure walls closing the ends of the main shell. Each modular unit has an axial length L1 that is smaller than W. Each modular unit also has interlock elements that interconnect with another like modular unit so that the main shells of the units can be aligned with each other in one integral assembly between the two form plates.
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