Apparatus for forming unlined passages through concrete walls
OwnerBruce G. Barton, Jr.inventor
Life of this patent
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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.
Claims14
A modular one piece passage unit adapted to be mounted in a concrete wall form with other such units to create a passage of controlled uniform size and configuration through a concrete wall molded in the concrete wall form, the concrete wall form including first and second form plates mounted in fixed spaced relation to each other with inner surfaces facing each other and separated by a spacing W, the modular passage unit being of generally drum-like configuration and comprising:
- an annular main shell having a size and configuration conforming to an axial segment of the desired passage through the concrete wall and having a given axial length L1, with L1<W;
- a front unit closure wall, closing off a front face of the main shell;
- the front unit closure wall including means for mounting the modular passage unit in predetermined position on the inner surface of the first form plate of the concrete wall form with at least the outer annular edge of the modular passage unit sealed against that inner surface;
- a rear unit closure wall closing off a rear face of the main shell;
- and interlocking means for interconnecting the modular passage unit with a second modular passage unit of like size and configuration so that the main shells of the two passage units are aligned with and immediately contiguous with each other within the concrete wall form;
- the main shell, the front unit closure wall, the mounting means, the rear unit closure wall, and the interlocking means all constituting a single, one piece integral unit.
A system of modular one piece passage units to be mounted in a concrete wall form with other such units, in a coherent stack, to create an unlined passage of uniform diameter D1 through a concrete wall molded in the concrete wall form, the concrete wall form including first and second form plates mounted in fixed spaced relation to each other with inner surfaces facing each other and separated by a spacing W, the system comprising a plurality of modular passage units;
- each modular unit being of generally drum-like configuration and each unit comprising:
- an annular main shell having an outside diameter D1 and an axial length L1, with L1<W;
- a front unit closure wall, closing off a front face of the main shell;
- the front unit closure wall including mounting means for mounting the modular passage unit in predetermined position on the inner surface of the first form plate of a concrete wall form with at least the outer annular edge of the modular passage unit sealed against that inner surface;
- a rear unit closure wall closing off a rear face of the main shell;
- and interlocking means for interconnecting the modular passage unit with a second modular passage unit of like size and configuration so that the main shells of the two passage units are aligned with and immediately contiguous with each other in a coherent stack within the concrete wall form, with at least one closure wall present in the stack spaced from the inner surfaces of both form plates of the concrete form;
- the main shell, the front unit closure wall, the mounting means, the rear unit closure wall, and the interlocking means all constituting a single one piece integral structure in each unit;
- the main shells of some of the passage units having an axial length L1 of approximately three inches;
- and the main shells of other passage units having an axial length of approximately four inches.
Dependencies are inferred from the claim text.