초록 ▼

A main drain safety grate apparatus utilizes an elongate drain, frame and grate that distribute the suction flow of water over a large surface to avoid full blockage of the grate, and also utilizes a bendable or deformable, upwardly releasable grate that has a section slotted to permit water to drai

A main drain safety grate apparatus utilizes an elongate drain, frame and grate that distribute the suction flow of water over a large surface to avoid full blockage of the grate, and also utilizes a bendable or deformable, upwardly releasable grate that has a section slotted to permit water to drain therethrough. The grate is ordinarily restrained from upward movement by a slot in each end of the frame into which the ends of the grate fit, and from downward movement by two shelves on which the grate may be supported. The grate may be released from the frame by an upward force applied at the section provided for drainage, which bends, or bows, the grate in an arcuate shape, and acts to shorten the length of the grate relative to the slots into which it is fitted. The bowing effect also serves to rotate a rounded surface and a corner of the end of the grate so as to reduce the effective length by rotating the corner away from the point of contact of the slot and the grate, and permitting that contact point to move over the rounded surface.

대표청구항 ▼

[ This invention claimed is:] [11.] A safety grate apparatus for a pool or spa drain, comprising:at least one deformably releasable grate, said releasable grate having a draining section, and two grate-ends;a frame engaging the grate, said frame having at least one retainer formed in each end to rec

[ This invention claimed is:] [11.] A safety grate apparatus for a pool or spa drain, comprising:at least one deformably releasable grate, said releasable grate having a draining section, and two grate-ends;a frame engaging the grate, said frame having at least one retainer formed in each end to receive the grate-ends;the grate being elongated between the two grate-ends;the grate being deformable in an arcuate manner to release said grate-ends from said retainers to protect a swimmer from entrapment;the grate-ends having distal edges, wherein said distal edges are tapered, and the retainers are slots;the grate being substantially prevented from deforming downwardly;the grate comprising a lower surface, and the frame further comprises at least two shelves extending beneath a portion of said lower surface, and said shelves substantially prevent the grate from deforming downwardly;the frame further comprising:a frame face;at least one liquid channel;at least one flange, andthe grate further comprising an upper surface, wherein the draining section has a plurality of transverse slots formed therethrough, and the frame face and the grate's upper surface are substantially level, and the shelves are integral with the liquid channel.