Liquid purification or separation – Structural installation – Grated inlet surface drain
Reexamination Certificate
2006-12-04
2008-09-02
Upton, Christopher (Department: 1797)
Liquid purification or separation
Structural installation
Grated inlet surface drain
C210S167160, C210S474000, C004S504000, C004S507000
Reexamination Certificate
active
07419588
ABSTRACT:
A grate cover in combination with a swimming sump being installed in a recess in the top of the sump. The grate cover having a multiple of interstices or openings there through. The size of the interstices being held to a minimum so that fingers of a human cannot be sucked into the openings. The top surface of the grate cover has a curvature thereon while the bottom surface is flat. This way, the forceful suction within the sump cannot obtain enough force to suction the skin of a human against the grate cover to cause any injuries.
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