Abstract: The present invention discloses a sink mounted dishwasher having a closure mechanism (41, 140) in the drain (15) of the sink (2). An hydraulic control system (FIG. 6) for such a dishwasher is also disclosed together with an hydraulically operated liquid detergent dispenser (47, FIG. 7). The preferred form of hydraulic fluid is liquid rinse aid. Two forms of spray arm (28, 128) are also disclosed, each with a structure (20) which enables the spray arm to be removably and rotatably mounted within the sink.

Abstract: A dishwasher lid assembly (1) is disclosed which includes a lid having upper (2) and lower (3) portions. The lid (2,3) is pivotally supported by a hinge shaft (4) above a sink (8). A hinge spring (5) surrounds the shaft (4) and biases the lid (2,3) to an open configuration. A latch can be used to retain the lid (2,3) closed. The shaft (4) and spring (5) are located within a hinge cover (9) below which is an air vent (6) arranged to permit vapor and/or air within the sink (8) to escape, thus preventing a build-up of pressure under the lid (2,3).