| 摘要 |
A drainage assembly ( 10 ) comprises a frame ( 11 ) for defining at least part of the surface boundary of a surface drainage aperture; and a grating ( 14 ) having formed therein a plurality of apertures. The grating ( 14 ) is hingedly secured to the frame ( 11 ) and is moveable, when so secured, between an operative position in which the grating ( 14 ) is contiguous with the frame ( 11 ); and an open position in which the grating ( 14 ) lies hinged away from the frame ( 11 ). The grating ( 14 ) includes protruding therefrom a pair of forks ( 34, 36 ). The frame ( 11 ) includes a pair of journal bearings ( 37, 38 ). The forks each have protruding therefrom a respective protuberance ( 39 ) that is receivable in a respective journal recess ( 42 ) formed in the journal bearings. At least one of the said forks ( 34, 36 ) is resiliently deformable and the locations of the respective protuberances ( 39 ) and journal recesses ( 42 ) are such as to urge the said protuberances ( 39 ) into associated said journal recesses when the grating ( 14 ) and the frame ( 11 ) are secured together.
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