Anti-rotation stop for chamber

Details Anti-rotation stop for chamber Anti-rotation stop for chamber

2008-04-29

2008-04-29

Lagman, Frederick L. (Department: 3672)

Hydraulic and earth engineering

Drainage or irrigation

Porous or apertured pipe, flume, or tileway

C405S043000, C405S044000, C405S045000, C405S049000

Reexamination Certificate

active

11190456

ABSTRACT:
A thermoplastic chamber for leaching wastewater or other use, which is designed so that when jointed to a like chamber the horizontal plane angle between the chambers can be adjusted, has one or more stops which can be selectively used to prevent rotation, for instance, to make the joined-together chambers lie along a straight line. Preferably, the stop is integral part of the chamber base flange; and it hinges and bends upwardly when moved to its working position, so the stop engages and limits movement of the end of the mating chamber.

REFERENCES:
patent: 5017041 (1991-05-01), Nichols
patent: 5087151 (1992-02-01), DiTullio
patent: 5498104 (1996-03-01), Gray
patent: 5556231 (1996-09-01), Sidaway et al.
patent: 6592293 (2003-07-01), Hedstrom et al.
patent: 6602023 (2003-08-01), Crescenzi et al.
patent: 6612777 (2003-09-01), Maestro
patent: 6698975 (2004-03-01), Benecke

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