公开(公告)号：US06442774B1

公开(公告)日：2002-09-03

申请号：US09848927

申请日：2001-05-04

申请人： Tim Wilson ,  Jamie Fraser ,  Patrick Thorpe ,  David Atkins ,  John Whiteside

发明人： Tim Wilson ,  Jamie Fraser ,  Patrick Thorpe ,  David Atkins ,  John Whiteside

IPC分类号： E04H400

摘要： A cover is provided for an end of a conduit. The cover comprises a front face covering the conduit end and a back face having fasteners for attachment to a conduit. A plurality of apertures pass between the front face and back face to allow the flow of liquid to and/or from the conduit. The edges of the front face defining the entrances to the apertures are non-planar. In addition to, or as an alternative to, the apertures are formed such that the flow of liquid between the front and back faces is deflected so that the liquid follows at least two directions in passing between the front and back faces. The cover can be used as a grille over drainage in a swimming pool.