Patent ID: 7033489

Claim:
A drainage assembly comprising a frame for defining at least part of the surface boundary of a surface drainage aperture; and a grating having formed therein a plurality of apertures, the grating being hingedly securable to the frame and being moveable, when so secured, between an operative position in which the grating is contiguous with the frame; and an open position in which the grating lies hinged away from the frame, the frame and the grating including mutually engageable hinge parts comprising a first pair of forks protruding from the grating; and a pair of journal members secured to the frame, one of the said first pair of forks and the pair of journal members each having protruding therefrom a respective protuberance and the other of the said first pair of forks and the pair of journal members each having formed therein a respective journal recess in which said protuberance is rotatably receivable when the frame and the grating are hingedly secured together, at least one of the said forks and/or at least one of the journal members being moveable against a resilient biassing to permit fabrication and dismantling of the drainage assembly, further comprising means for substantially preventing at least one of said protuberances rotatably received in one said journal recesses from being removed from said one of said journal recesses when the grating is in the operative position.