Liquid purification or separation – Structural installation – Grated inlet surface drain
Reexamination Certificate
2000-06-27
2001-11-13
Upton, Christopher (Department: 1724)
Liquid purification or separation
Structural installation
Grated inlet surface drain
C210S452000, C210S479000, C210S499000, C004S291000, C004S292000
Reexamination Certificate
active
06315896
ABSTRACT:
This invention relates to drain protection. More particularly it relates to methods and apparatus for collecting particles of solid waste at the entry of a gravity drain for easy disposal and thereby protecting the downstream drain from unnecessary clogging.
Gravity-fed drains are commonly used in many places to permit flush cleaning. Floor level gravity drains are employed, for example, in food serving establishments such as hotel and restaurant kitchens so that the kitchen floor may be conveniently flushed with water to maintain sanitation. Such drains typically employ a drain inlet at floor level which is connected to a drain line by a tapered collection cup. The top of the collection cup is covered at floor level with a grate or screen and the bottom of the cup connected to a gravity drain line. Thus water used in washing the floor may drain through the grate and into the drain line. The grate provides a floor surface which has holes to permit water to drain into the drain line.
In many instances, particularly in food service kitchens, the grate is ineffective in separating solid waste from drain water. As a result, a high volume of solid waste particles passes through the grate and into the drain system. Such solid waste particles tend to aggregate and form clogs or plugs which impair or totally stop drain flow. A stopped drain is not only messy and difficult to clean, the plugged drain may (and often does) result in flooding or partial flooding of the kitchen floor with solid and liquid wastes, creating a highly unsanitary and unacceptable condition.
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Kanz Jack A.
Upton Christopher
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