Baths – closets – sinks – and spittoons – Strainer – stopper – plug or closure
Reexamination Certificate
2000-10-20
2001-11-13
Eloshway, Charles R. (Department: 3751)
Baths, closets, sinks, and spittoons
Strainer, stopper, plug or closure
C004S287000, C004S597000, C004S665000, C137S362000
Reexamination Certificate
active
06314590
ABSTRACT:
The invention relates to a drainage device and in particular a drainage device for a waste water outlet in a shower, bath or sink.
In accordance with the present invention, a drainage device for a waste water outlet comprises an outer tubular member adapted to fit within the waste water outlet, an inner tubular member located within the outer tubular member, the interior of the inner tubular member providing a first outlet and a second outlet being defined by the external wall of the inner tubular member and the internal wall of the outer tubular member, and a valve member movably mounted with respect to the inner and outer tubular members for movement between a first position in which the second outlet is obturated and the first outlet is open to permit a liquid to flow therethrough, and a second position in which the second outlet is open to permit liquid to enter the second outlet.
Preferably, the valve mechanism is slidably mounted on the inner or the outer tubular member and is preferably slidably mounted within the inner tubular member.
Typically, the valve mechanism comprises a flange which obturates the second outlet when the valve mechanism is in the first position, and is raised away from the second outlet to permit liquid to enter the second outlet when the valve mechanism is in the second position.
Typically, the valve mechanism may comprise a tubular member through which liquid may flow into the inner tubular member.
Preferably, the valve mechanism comprises a filter device to prevent or minimise the possibility of solid objects entering the first outlet. Typically, solid material is trapped in or on the filter device.
Preferably, the valve mechanism is biased to the second position and may be moved to the first position by a force applied to the valve mechanism to move the valve mechanism from the second to the first position.
Preferably, the inner tubular member is located concentrically within the outer tubular member. Typically, the outer tubular member, the inner tubular member and the valve mechanism are all concentric.
Typically, the inner tubular member is adapted to be coupled to a drain pipe which leads to a drainage or sewerage system and the outer tubular member is adapted to be coupled to a waste water tank so that water entering the second outlet flows between the inner and outer tubular members and into the tank.
Where the drainage device is installed in a waste water outlet of a sink, bath or shower, the waste water from the waste water tank may subsequently be used as a water supply for a cistern for flushing a toilet.
REFERENCES:
patent: 97219 (1869-11-01), Nott
patent: 346579 (1886-08-01), Butler
patent: 695312 (1902-03-01), Hickey
patent: 4103372 (1978-08-01), Cuschera
patent: 5353448 (1994-10-01), Lee
patent: 151278-B1 (1931-12-01), None
patent: 9012123 (1990-12-01), None
Eloshway Charles R.
Ostrolenk Faber Gerb & Soffen, LLP
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