Abstract: An elongated plastic chamber utilized for disposal of stormwater has a corrugated wall structure having successive peaks and valleys. The peaks and valleys are connected by upstream and downstream web panels. A series of apertures is disposed in the upstream web panels. The associated facing downstream web panel is smoothly integrated with the corresponding valley to form a curved surface which is concave with respect to the associated peak and serves to deflect outwardly from the chamber water emergent from the apertures. The effect of the interaction of the apertures with the curved surface is to minimize deposition of sediment within the chamber.

Abstract: A layered foundation for a play surface includes an upper layer formed of wood mulch or another landscaping loose-fill material, a support layer composed of multiple fragments of a resilient material such as vulcanized rubber, and a landscaping fabric sheet disposed between the upper layer and the support layer. The support layer, preferably 3-4 inches in depth, contributes considerably to the shock-absorbing capability of the foundation, to provide a foundation that meets or exceeds recommended levels of impact attenuation, yet has a total depth less than that considered necessary in conventional foundations or support systems. The support layer also effectively drains water from the upper layer, due to multiple, interconnected passages between fragments.

Abstract: A protective device having a shell structure and being shaped from a plate-shaped material, in particular but not exclusively, adapted for covering of a sub sea structure, such as at least one pipe line (21, 22), a Christmas tree or parts of such constructions. The protective device is designed as a downward open and upwards closed convex container or channel, comprising a substantially plane roof plate (5), e.g., two substantially plane and inclined side walls (3, 4) which may end in an individual foot plate (1, 2). The protective device or parts thereof is (are) designed with a shallow wave structure or with a weakly corrugated structure, the waves having a wave length (1) above 2.5 times the wave-height (h), and where the wave height does not exceed 10 times the thickness (d) of the plate-shaped material. As examples of usages the following may be mentioned: protection of constructions on land, lining of tunnels, building materials and modules for offshore living quarters.

Abstract: Water from a septic tank is aerated, at an above-ground aeration station. The aerated water is infiltrated onto the floor of a trench in the ground through drainage holes in a pipe. The pipe is pressurized with water during dosing. The pipe is arranged to sag down between support posts, whereby water drains completely out of the pipe between dosings, evenly along the length of the pipe.

Abstract: A drain channel system comprising a channel with a lower channel section, which lower channel section incorporates a continuous cavity that is open toward the bottom and underneath which a seepage area is located for draining off surface water, the cavity being connected to a reservoir, a box drain or collecting tank, the reservoir, box drain or collecting tank being connected on its part to a device for feeding in surface water, and a dirt filter being provided in the reservoir, box drain or collecting tank, or between the reservoir or box drain or collecting tank and the cavity.

Abstract: A subsurface fluid distribution system for sewage effluent and irrigation water utilizes one or more arrays of serially connected leaching chambers. Each leaching chamber is a double-walled construction of arch-shaped cross section with an open bottom and closed ends. A plurality of vertically off-set openings are formed in the inner and outer walls, with the inner openings located at a higher liquid level than the outer openings to prevent clogging of the leaching chambers by either sand or root growth. The leaching chambers are connected to one another to permit fluid communication between adjacent chambers, and are installed below ground in shallow trenches that are backfilled with sand and then topped with top soil. The sewage effluent or irrigation water flows through the array of leaching chambers in an unpressurized flow.

Abstract: A leaching system (10) includes arched leaching chamber sections (12) and an angled adapter (18) connected adjacent chamber sections at a 22.5.degree. angle. The adapter includes a first portion (122) having sidewalls (140, 142) spanned by a vaulted portion (144) and a female end collar (126). A second end portion (124) has sidewalls (140, 142) spanned by a vaulted portion (144) and a male end collar (130). The first and second end portions are connected at an arched, vertical ridge (136). The adapter connects the leaching chamber sections in a nonlinear configuration to curve the leaching system to follow contours and avoid obstacles.

Abstract: A leaching chamber (10) includes first and second side walls (46) which have louver sections. The side walls are connected by vaulted portion (48) to define a chamber potion (12) terminating at a first end (16) and a second end (18). Male and female coupling collars (20, 30) are integrally connected with corrugation peaks at the first and second ends. An intermediate peak or structure (70) has a first portion (72) with a profile of the male coupling collar and a second portion (74) with a profile of the female coupling collar upon cutting between the two portions, two subchambers (12', 12") are formed each having a female coupling collar at one end and a male coupling collar at the other. An inlet end cap (14) is telescopically connected to the female coupling collar (30). The inlet end cap (14) has a sleeve (102) to receive a conduit carrying effluent and a diffuser (104) to diffuse the received effluent. The diffuser includes a sloping surface with diverging ribs (106).

Abstract: A drain field and a drain field assembly for use with a sewage disposal system are provided that do not require the use of aggregate in the form of rock, gravel, shale, or the like. The assembly contains a distribution pipe having a plurality of holes disposed along its bottom half for receiving liquid effluent. Alongside and beneath the distribution pipe are positioned a plurality of void pipes having holes and slots therein that serve to retain and distribute the effluent received from the distribution pipe. Draped over the top and along the sides of the assembly is a protective sheeting that is impervious to soil and liquid permeable that serves to keep soil from entering the pipes and also to aid in evapotranspiration. The drain field of the present invention contains the assembly positioned within a trench and covered with backfill material.

Abstract: A molded plastic leaching chamber, for dispersing or collecting liquids in soil, has a corrugated arch shape. The sidewall of the chamber is comprised of alternating slot-perforated peaks and valleys connected by slot-perforated deep webs. The unit surface length of perforated sidewall is greater than the unit length of chamber. A combination of interrelated dimensions and angles provide high leaching capacity, strength, and capability to nest for shipment. The sidewall is reinforced by vertically running ribs; the perforated web is reinforced by zig-zag struts. Ribs and struts are shaped and positioned to minimize blockage of the slot openings.

Abstract: A leaching chamber for burial in the ground includes non-symmetrical corrugations extending laterally across the leaching chamber. Each corrugation has a ridge and a shoulder with the ridge being higher than the shoulder and sloping down from the ridge to the shoulder. Additionally, the ridge of each corrugation is also wider than the shoulder. The corrugations are oriented relative to each other such that the ridge of each corrugation is adjacent to the shoulder of an adjoining corrugation. Identical chambers are joined by mating flanges, each flange including a series of flange members alternating about a common reference curve, which defines a matable surface of each flange member.

Abstract: A conduit for dispersing or gathering liquids in the earth has an arch shape cross section and alternating peak and valley corrugations along its length, with cantilever legs extending from one end to interact with the mating portion of a like conduit. The legs, along with a shiplap joint having flange discontinuities for manufacturability, provide a superior rigid joint when the conduits are mated and buried beneath the earth and subjected to vertical loads.

Abstract: A conduit for dispersing or gathering liquids in the earth has an arch shape cross section and alternating peak and valley corrugations along its length. At one end of the conduit is a sub-arch for receiving a pipe. In one embodiment there is a discontinuous valley by the sub-arch and a continuous web on the peak corrugation near the sub-arch in combination with cantilevered legs. In another embodiment the web is discontinuous while the valley is continuous in the region of the sub-arch. Both essential constructions provide a strong joint when conduits are mated to each other and are buried in the earth and subjected to a load.

Abstract: A sub-surface irrigation system includes a conduit connected to a water supply. A plurality of fluid dispenser units are connected to a conduit or conduits. Each of the fluid dispenser units includes a connector interconnected at one end to the interior of the conduit. The other end of the connector is coupled to a drip emitter positioned in an elongated casing. The elongated casing has an enlarged opening at one end and a reduced opening formed at the other end. Tubing interconnects the other end of the connector to the casing. The drip emitter is positioned in the tubing adjacent the casing reduced opening end. In a different invention, the casing extends up to the surface of the ground, so that inspection may be made relative to the operativeness of the drip emitter.

Abstract: In septic systems for handling household waste water or in clear water drainage applications, lightweight molded polyethylene galleries are used to form the drain field. The galleries can be axially aligned in end-to-end relationship with each gallery defining an interior hollow chamber. A unique latching system is used to attach adjoining galleries to one another. A perforated delivery conduit extends through and introduces effluent into the hollow chambers of the galleries where it is allowed to seep therefrom into the surrounding earth through the open bottoms of the galleries or through infiltration apertures in the walls of the galleries.

Abstract: A recreational area construction comprising a base having depressions and rises thereon; a plurality of borders forming a perimeter around said base; strips of water pervious material on the base and lining the depressions, and having their ends overlapping whereby water flows laterally across the strips toward the borders; an end of one of said strips extends beneath and beyond said border whereby water is conveyed away from the said area; and a top layer of cushioning material supported on the base and water pervious material.

Abstract: A recreational area construction comprising a base with a plurality of borders forming a perimeter on the base; a layer of water pervious material on the base between the borders, and a top layer of cushioning material supported on the base and layer of water pervious material.

Abstract: A sub-surface irrigation system includes a conduit connected to a water supply. A plurality of fluid dispenser units are connected to the conduits. Each of the fluid dispenser units include a connector interconnected at one end to the interior of the conduit. The other end of the connector is coupled to a drip emitter positioned at one end of an elongated casing. The elongated casing has an enlarged opening at one end and a reduced opening formed at the other end. Tubing interconnects the other end of the connector to the casing. The drip emitter is positioned in the tubing adjacent the casing reduced opening end.

Abstract: A conduit for dispersing or gathering liquids in the earth has an arch shape cross section and alternating peak and valley corrugations along its length. A more rigid shiplap joint is formed between mating conduits by means of cantilever legs extending from the end of a conduit, forming a female pocket like space for the mating unit, and by having a continuous web on the peak corrugation adjacent the end. A sub-arch at the top of an overlapped valley end, to enable connection of a pipe to the conduit, is spaced apart from the web of the adjacent peak corrugation; there are multiple legs on either side of the sub-arch, with the sub-arch connected by webs to the adjacent legs, and by other webs to the peak corrugation.

Abstract: In a septic system for handling household waste water, used vehicle tires are employed to form the septic tank and the leaching galleries. Vehicle tires sealed to one another and in combination with end caps provide a watertight and lighttight enclosure in the septic tank. An inlet conduit permits the influx of sewage into the enclosure while an outlet conduit allows egress of effluent from the enclosure via hydrostatic pressure. The drain field used with the system and also useful for other purpose has tires axially aligned forming an array with each tire defining an interior hollow chamber. A delivery conduit leading from the outlet conduit of the septic tank introduces effluent into the hollow chambers of the vehicle tires where it is allowed to seep therefrom into the surrounding earth through apertures in the walls of the tires. The tires in the drain field can be horizontally aligned or can be in a vertical stacking arrangement similar to the arrangement found in the septic tank.

Abstract: Profile elements are provided for enriching or purifying substances that have different states, i.e., an environmental material and a fluid material. The profile elements for supply or removal of fluid substances to or from granulated, fibrous, or soil-like material in the environment surrounding the profile elements comprise a plurality of spaced apart webs and boundary walls that connect to webs and are supported by them. These elements then define a plurality of longitudinal channels arrayed side-by-side between the webs. The boundary walls are shaped to have a surface area substantially greater than equivalent flat walls. At least a portion of the webs and the boundary walls is pierced or perforated, as if a mesh or lattice, to permit fluid communication between adjacent channels and/or between the channels and the surrounding environment.

Abstract: A thermoplastic device for leaching sewage system effluent into the earth has the shape of an inverted trough. Its sidewalls have slot shaped perforations; above each slot is a lip; beneath each slot is one or more protuberances, preferably rectanguloid in shape. The combination of lips and protuberances prevent compaction of the earth against the sidewalls when the devices are buried without the use of stone fill. They permit the formation of a good biocrust layer and facilitate the exfiltration of liquid into the earth.

Abstract: Apparatus and a method for constructing a sewage drain field without a rock media. The drain field includes a plurality of lengthwise connected drain pipes suspended above the trench bottom within a channel formed by a plurality of elongated mesh-like channel forming members and in overlying relation to which assembly a porous, conforming length of sheet goods is mounted. As necessary, mesh-like end caps seal the ends of the channel forming members. Independently mounted filter elements may be used to filter the grey water and/or channel the grey water in lieu of the conduit.

Abstract: Two settling tanks are arranged one beside the other and are separated by a walk-in corridor. The settling tanks are defined by four longitudinal walls, one end wall, and two ramps, which are disposed opposite said end wall. Two additional tanks are provided on the opposite side of the end wall. The longitudinal walls carry overflow weirs, which are continued on the outside by discharge troughs, which open into the tank. Owing to the large effective length of the overflow weirs the overflow velocity is low and the settling effect is high.

Abstract: The present invention relates to a water detection subassembly and method for forming same, for use in association with water detection system operating within a digital computing center. The subassembly includes a perforated protective shield fitted about a fabric mesh supporting copper conductors connected to a low voltage service. In that way, the shield completely isolates the fabric mesh and copper conductors against abuse such as provided from workmen's shoes coming into contact with the subassembly during repair, replacement or renovation of computing equipment at the center.The shields are conveniently formed from commercially available plastic pipe such as PVC, sliced longitudinally and then attached to the concrete sub-floor of the computing room along the two cut longitudinal surfaces. Since a pair of shields can be formed from each section of plastic pipe, the shields are inexpensive to manufacture.

Abstract: This invention is in regard to septic tank drainage conduit structures, including an open-sided conduit structure for installation in clay type soil conditions and a U-shaped conduit structure for use in loose or sandy soil conditions. Each conduit structure is constructed of an integral material and of a large size to achieve maximum absorption of waste septic fluid into the surrounding soil area. Each conduit structure is supported on leg members with a completely open bottom area between the leg members to achieve maximum waste water absorption downwardly from each conduit structure.

Abstract: A storm overflow basin for use, e.g. in combined sewage systems has a storage tank leading to a storm overflow unit having a restricted sewage discharge and a storm overflow, the latter being provided with a weir at which there is mounted a flap gate engaging the crest of the weir with its bottom edge and being operable by float controlled means in dependence upon the water level in the storm overflow unit, to move away from the crest of the weir when storm conditions require a controlled overflow discharge. The normal sewage discharge is provided with restriction means that are also float controlled.

Abstract: A distributor unit for use in leaching fields comprises a hollow open-bottomed concrete structure having a top wall and side and end walls defining a central cavity and which, in use, protects a sand bed into which effluent material from a septic tank can flow. The top of the structure is provided with a longitudinal channel which receives a perforated supply pipe for the effluent, and the base of the channel has apertures through which the effluent material can flow from the channel down onto the sand bed. The side walls have openings to allow evaporation of liquid from the central cavity. The whole structure is designed to be surrounded by crushed stone and to be covered with earth.