Static structures (e.g. – buildings) – Having means forming cavity – core – or cell in slab – Thin-walled type
Patent
1992-10-07
1994-09-20
Gall, Lloyd A.
Static structures (e.g., buildings)
Having means forming cavity, core, or cell in slab
Thin-walled type
249142, 249177, 264 31, 264264, B28B 716
Patent
active
053477863
ABSTRACT:
A reusable concrete spacer sleeve comprises a substantially cylindrical body having a plurality of inwardly extending fins. The sleeve is placed over a vertical drain pipe prior to pouring a concrete floor. After the concrete has set, the sleeve is removed, leaving an annular space around the pipe for accommodating a flange. A lid may be fitted onto the sleeve to prevent debris or other foreign matter from entering the pipe or the annular space around the pipe.
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Bruno James
Gall Lloyd A.
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