Stackable riser for on-site waste and drainage systems

Details Stackable riser for on-site waste and drainage systems Stackable riser for on-site waste and drainage systems

1994-12-29

1997-04-08

Friedman, Carl D.

Static structures (e.g., buildings)

With entrance for persons or objects in horizontal or...

With additional enclosure structure; e.g., manhole

52 791, 52136, 220 426, 405136, 405 41, E02D 2914

Patent

active

056176791

ABSTRACT:
A plastic stackable riser for providing a grade level access for underground components such as septic tanks, distribution boxes, and drop boxes, is disclosed. The stackable riser includes a continuous peripheral side wall having a top free edge and a bottom edge. The top free edge defines a first end opening and the second bottom edge is connected to a generally inverted U-shaped connecting member which defines a channel shaped to receive the first free edge portion of an adjacent stackable riser. In use, a plurality of stackable risers are interlocked together so that the side walls all extend along common vertical axes to the underground component.

REFERENCES:
patent: 3772826 (1973-11-01), Ferver
patent: 4472911 (1984-09-01), Jooris et al.
patent: 4663036 (1987-05-01), Stobl, Jr. et al.
patent: 4998387 (1991-03-01), Geiger
patent: 5046886 (1991-09-01), Muir et al.

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