Baths – closets – sinks – and spittoons – Drain – overflow or trap for a sink or bath – Drain and overflow
Reexamination Certificate
1999-05-26
2001-01-16
Eloshway, Charles R. (Department: 3751)
Baths, closets, sinks, and spittoons
Drain, overflow or trap for a sink or bath
Drain and overflow
C004S683000
Reexamination Certificate
active
06173459
ABSTRACT:
BACKGROUND OF THE INVENTION
Bathtub drains commonly have a closure element therein which can open or close the drain by being lifted manually upward to open the drain or drop to an initial seating position to close the drain. While such drain closures work well, they are not greatly convenient by reason of their being located on the bottom of the tub where the drain is located.
Linkage systems do exist in at least lavatories or the like where the waste water drain is opened or closed through a linkage system wherein the operative mechanism is located above the bottom level of the basin. However, these are not easily adapted to the bathtub environment, and pose at least some problems in maintaining the cleanliness of the fixture around the exposed end of the linkage system where the closure is operated.
Variations in tub dimensions and the like sometimes make the adaptation of linkage systems difficult to install.
It is therefore a principal object of this invention to provide a control for a bathtub waste water drain which is easily accessible to the person using the tub.
A further object of this invention is to provide a control for a bathtub waste water drain which can be easily installed in spite of variations in the dimensions of the tub.
A still further object of the invention is to provide a control for a bathtub waste water drain which can be easily cleansed.
These and other objects will be apparent to those skilled in the art.
SUMMARY OF THE INVENTION
A control for a waste water drain in the bottom of a bathtub which has an overflow port above the drain in the end wall of the bathtub has a vertical drain pipe having upper and lower ends. A first fluid port is located at the upper end of the vertical drain pipe and a second fluid port is located below the first fluid port for connection to a bathtub waste water drain.
A valve element is slidably mounted in the vertical drain pipe adjacent the second port and is movable between a lower position to close the second port to fluid flow, and an upper position which will open the second fluid port to fluid flow.
An overflow cap is rotatably mounted adjacent the first port. An elongated linkage connects the valve element to the overflow cap so that the rotation of the cap in one direction will raise will raise the valve element to the upper position, and rotation of the cap in the opposite direction will lower the valve element to the lower position. The vertical drain pipe is length adjustable.
REFERENCES:
patent: 1901118 (1933-03-01), Pope
patent: 2122620 (1938-07-01), Nystrom
patent: 4352213 (1982-10-01), Watts
patent: 4594738 (1986-06-01), Gebert
patent: 4744108 (1988-05-01), Schmidt
patent: 5123123 (1992-06-01), Hart et al.
patent: 5394572 (1995-03-01), Humphreys
patent: 5890241 (1999-04-01), Ball
patent: 830734 (1960-03-01), None
patent: 520880 (1955-03-01), None
Eloshway Charles R.
WCM Industries, Inc.
Zarley McKee Thomte Voorhees & Sease
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