Pipe seal assembly for poured concrete on-site waste disposal sy

Details Pipe seal assembly for poured concrete on-site waste disposal sy Pipe seal assembly for poured concrete on-site waste disposal sy

1988-11-23

1990-08-28

Woo, Jay H.

Static molds

In situ construction engineering type or building type-mold...

Forming hydraulic and earth control type product in situ

220 34, 249 39, 249 52, 249 91, 249177, 277207A, E02D 2916

Patent

active

049519140

ABSTRACT:
A pipe seal assembly for a poured concrete tank or box in an on-site waste disposal system including a seal member having an inclined inner wiper flange which releasably retains a mandrel, and plug means also releasably mounted within the seal member to prevent ingress of liquid concrete during box formation. A spacer member is provided for those instances where the seal member is to be installed in the wall of a relatively thick-walled concrete box. Alternate means for releasably retaining the seal member to the mandrel are disclosed. Additionally, a series of such seal assemblies is disclosed for use in sealably attaching a pipe through a thick poured concrete wall, such as a basement wall.

REFERENCES:
patent: 3516679 (1970-06-01), Schmitt
patent: 3796406 (1974-03-01), Ditcher
patent: 3857589 (1974-12-01), Oostenbrink
patent: 4103901 (1978-08-01), Ditcher
patent: 4350351 (1982-09-01), Martin
patent: 4508355 (1985-04-01), Ditcher
patent: 4625976 (1986-12-01), Gilbert
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patent: 4732397 (1988-03-01), Gavin
patent: 4744571 (1988-05-01), Geberth, Jr.
patent: 4805920 (1989-02-01), Gavin
patent: 4809994 (1989-03-01), Skinner et al.

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