Abstract: A filter system for filtering water and/or wastewater which includes an underdrain system having a plurality of laterals that are anchored to the floor of a filter by a hold-down assembly. Preferably, the hold-down assembly does not rely on grout or other substance that is applied in a viscous or semi-viscous state and subsequently hardened as the primary means for connecting the underdrain laterals to the floor of the filter. Preferably, the hold-down assembly includes hold-down clips that can move relative to an anchor assembly and corresponding underdrain blocks so that the hold-down clips can cooperate with any desired portion of the corresponding underdrain blocks.

Abstract: A filter system for filtering water and/or wastewater which includes an underdrain system having a plurality of laterals that are anchored to the floor of a filter by a hold-down assembly. Preferably, the hold-down assembly does not rely on grout or other substance that is applied in a viscous or semi-viscous state and subsequently hardened as the primary means for connecting the underdrain laterals to the floor of the filter. Preferably, the hold-down assembly includes hold-down clips that can move relative to an anchor assembly and corresponding underdrain blocks so that the hold-down clips can cooperate with any desired portion of the corresponding underdrain blocks.

Abstract: A method and apparatus for monitoring an underdrain in a filter system for filtering water or wastewater. At least one diagnostic condition relating to the performance of the underdrain is monitored to determine if the underdrain is operating in an acceptable manner.

Abstract: A canopy system for a cart, such as a golf cart has a canopy supported by a support member, and a housing having an opening through which at least a portion of the canopy may extend when the canopy is deployed.

Abstract: A flume for a filter system including at least one filter having a filter bed that is periodically washed with liquid, gas and/or a combination of liquid and gas. The flume includes a chamber having a top wall, a bottom wall, a left sidewall and a right sidewall. The chamber is adapted to receive a liquid, a gas and/or a combination of liquid and gas. Preferably, the flumes includes at least a first inner wall and a second inner wall. Each of the first inner wall and the second inner wall are preferably free of any orifices. The first inner wall is positioned relative to the second inner wall such that an open space is formed between the first inner wall and the second inner wall. The open space creates a first liquid/gas interface upstream of the first inner wall and the second inner wall and a second gas/liquid interface downstream of the first inner wall and the second inner wall when gas and liquid are present in the chamber.

Abstract: A filter having a gravel-less underdrain and a filter layer installed directly on top of the gravel-less underdrain. The filter layer is designed such that when fluid is directed through the filter layer at controlled rates a protective barrier is formed by the larger particles of the filter layer directly above the gravel-less underdrain to prevent clogging and/or structural failure of the gravel-less underdrain thereby obviating the need for one or more layers of gravel or torpedo sand.

Abstract: A pretreatment unit and associated method for pre-treating filter media used to filter water or wastewater prior to installation in a filter. Preferably, the pretreatment unit includes a pretreatment chamber for temporarily storing and pre-treating filter media prior to installation of the filter media in a filter. The pretreatment chamber has a liquid distribution system for distributing liquid through the filter media at a sufficient velocity to remove fines or other unwanted material from the filter media. The washing liquid may be super chlorinated to sterilize the filter media. The pretreatment unit also includes a collector for collecting fines or other unwanted material removed from the filter media. Preferably, at least a portion of the collector is disposed in the pretreatment chamber. The pretreatment unit further includes a filter media discharge port for discharging filter media treated in the pretreatment chamber.

Abstract: A data-display system employs a display in which the representations of data objects are caused to move on the display in order to convey information about the represented data objects. In one example, icons in a link-analysis display that represent data objects satisfying a selection criterion are made to execute distinctive motion. In another example, three-dimensional models of moving bodies in whose features components of respective data objects are encoded are projected onto a screen plane, and the resultant values are used to generate the display.

Abstract: A data-display system employs a display in which the representations of data objects are caused to move on the display in order to convey information about the represented data objects. In one example, icons in a link-analysis display that represent data objects satisfying a selection criterion are made to execute distinctive motion. In another example, three-dimensional models of moving bodies in whose features components of respective data objects are encoded are projected onto a screen plane, and the resultant values are used to generate the display.

Abstract: A system for settling solids or other impurities from water or wastewater. The system includes a containment vessel for containing fluid. The containment vessel has an inlet for receiving an influent and an outlet through which an effluent is discharged. At least a first group of tube settlers is disposed in the containment vessel. The first group of tube settlers has a top, a bottom and a plurality of tubes for receiving influent and discharging effluent. A distribution channel is provided for distributing influent evenly through the first group of tube settlers to enhance the settling of solids and other impurities from water or wastewater.

Abstract: A fluid distribution system for directing fluids through a filter system. The fluid distribution system ensures proper distribution of fluids during the process of filtering as well as the process of washing a filter bed. The fluid distribution system may be used with numerous filter systems including but not limited to an upflow filter, a downflow filter, a combined upflow/downflow filter and/or multiple downflow filters connected in series.

Abstract: An underdrain system having a bottom formed of concrete. The concrete bottom includes a plurality of depressions formed therein. A porous plate is operably associated with at least one of the depressions. An anchor assembly is provided for anchoring the porous plate to the concrete bottom in an efficient and cost effective manner. Preferably, the anchor assembly permits the porous plate to be readily replaced. An optional insert may be used to enhance the distribution of the flow of fluid through the porous plate.

Abstract: An underdrain system for a filter having filter media. The underdrain system preferably includes a bottom formed of concrete having a plurality of generally cone-shaped depressions formed therein. Fluid flows through the plurality of generally cone-shaped depressions during filtration and washing. The underdrain system further includes a fluid distributor operably associated with at least one of the generally cone-shaped depressions. The fluid distributor preferably has a plurality of elongated slots for distributing the flow of fluid passing into and out of the generally cone-shaped depressions. The slots are sized to prevent filter media supported by the fluid distributor from passing therethrough. An optional insert may be provided to ensure even distribution of fluid through the fluid distributor.

Abstract: The invention may be embodied in as a canopy system for a vehicle, such as a golf cart. The invention may include nested support members and/or a housing.

Abstract: A data-display system employs a display in which the representations of data objects are caused to move on the display in order to convey information about the represented data objects. In one example, icons in a link-analysis display that represent data objects satisfying a selection criterion are made to execute distinctive motion. In another example, three-dimensional models of moving bodies in whose features components of respective data objects are encoded are projected onto a screen plane, and the resultant values are used to generate the display.