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| Number | Title | Issue Date |
| 7144185 | Street grid for surface drainage A street grid is provided for surface drainage. The grid includes a frame and a grating, which are adapted to the contours of a paved gully in order to be integrated into the latter, for draining water that flows towards the street grid in a pre-defined flow directi... | 12/05/2006 |
| 7004508 | Flexible drain element A flexible drain element is used in place of a trap and has a section that is flexible with a stiffness that is selected to make clearing blockages easy and expeditious. ... | 02/28/2006 |
| 6926022 | Condensate removal system A condensate removal system for removing condensate or infiltrate from a fluid reservoir containing a lubricating or scaling fluid. The condensate removal system includes a fluid conduit having a discharge leg with an outlet port. The condensate removal system preve... | 08/09/2005 |
| 6543470 | Flexible trap for drains Traps particularly intended for carrying condensate from air conditioner drip trays towards a drainage system are constructed from a single turn of a flexible thermoplastic pipe; each unit being preformed when in a heat-softened state into a shape of a on... | 04/08/2003 |
| 6279601 | Liquid zone seal A seal assembly that provides a means for establishing multiple pressure zones within a system. The seal assembly combines a plate extending from the inner wall of a housing or inner enclosure that intersects with and is immersed in the fluid contained in... | 08/28/2001 |
| 4555820 | Drain pipe system A system for clearing clogged drain pipes comprising a drain pipe section either straight or P-trap, having a closeable side inlet adjacent the upstream end of the pipe, means to connect the side inlet to a source of pressurized water, an anti-backflow de... | 12/03/1985 |
| 4215716 | One-way conduit closure A conduit has an upper and a lower open end. A sealing ring surrounds the conduit exteriorly adjacent the lower open end, and a cover is mounted on the conduit to be located beneath the lower open end. The normally upwardly facing side of the cover is pro... | 08/05/1980 |
| 4074686 | Manually closable anti-backup trap A trap for a drain has a housing with a lateral exit port for water flowing in through an apertured lid and/or through a lateral entrance port. A tubular insert fitted to the sidewall with the exit port has a bottom inlet beneath the level of that port an... | 02/21/1978 |
