Class 405/45 - Porous

Subclass of Class 405 - Hydraulic and earth engineering
Definition: Method or apparatus wherein the sidewall, a portion of the
No. of patents: 279
Last issue date: 01/31/2012

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Number	Title	Issue Date
4639165	Drainage tube Subsoil drain strip or sheet elements comprising a core surrounded by a polymer or glass fibre filter cloth. The core has a generally planar configuration with hollow formed-in flat topped projections on one or both sides which create internal volume for ...	01/27/1987
4626129	Sub-soil drainage piping A sub-soil drainage pipe segment 12 comprises a first round cylindrical portion 14 forming a socket 16 and a second round cylindrical portion 18 integral with and extending from the first portion, the inside diameter of the first portion being substantial...	12/02/1986
4622138	Vertical drain A vertical drain for dewatering saturated, compressible soils. When stored and delivered the drain has a rectangular cross section and can be rolled on reels, but since the drain can be folded longitudinally the drain, when installed in the soil will expo...	11/11/1986
4616055	Porous irrigation pipe and method A mixture of virgin crumb rubber sized to between 30 mesh and 100 mesh containing less than 5%+100 fines and thermoplastic binder, such as carbon black filled polyethylene containing a coating promoter, such as a citrate salt and lubricant, such as a calc...	10/07/1986
4615642	Variable porosity irrigation pipe Porous pipe having a porosity which varies continuously and controllably with length is produced by extruding a mixture of particles of prevulcanized elastomer such as reclaimed crumb rubber and a thermoplastic binder such as polyethylene with all paramet...	10/07/1986
4577998	Production of PVC irrigation pipe and the pipe so produced Process for producing flexible PVC irrigation pipe by extruding a plasticized PVC composition containing a melt strength-enhancing aid and a chemical blowing agent and (a) the extruded melt being expanded by foaming thereof immediately on leaving the die ...	03/25/1986
4574541	Foundation-drainage panel A construction element for foundation drainage has an integral, flexible, and substantially water-impervious panel lying generally in a plane and formed with respective arrays of inner and outer bumps to opposite sides of the plane. The outer bumps form o...	03/11/1986
4572700	Elongated bendable drainage mat Elongated, bendable drainage mat having a rectangular transverse cross section and comprising a polymeric core having a plurality of substantially rigid fingers extending from one side of a layer and an enveloping water permeable fabric having a permittiv...	02/25/1986
4534143	System for controlling the moisture in the subsurface soil surrounding a building Apparatus for controlling the moisture in the ground surrounding a building comprising a circumferential conduit extending around the building approximately ten inches below the ground level and from six to twenty-four inches away from the foundation of t...	08/13/1985
4523613	Multi-layered corrugated conduit with "black-eye" like apertures The conduit includes a top wall (A) and a base (B). The top wall A has an apex area (10) which is connected with a first corrugated side wall (12) and a second corrugated side wall (32). The side walls having alternating peaks (22, 42) and valleys (24, 44...	06/18/1985
4523874	Plastic underdrainage tube A plastic underdrainage tube of generally reticular configuration formed by integrally extruding a plastic material is disclosed. The tube is basically composed of axially spaced apart annular bands having relatively greater thicknesses to reinforce or im...	06/18/1985
4517316	Porous irrigation pipe prepared from particulate elastomer and thermoplastic binder containing controlled moisture content A mixture of crumb rubber, binder, such as polyethylene, and slip contact agent, such as talc, and lubricant, such as a metal stearate, is formed in a blender (10), is shaped into pellets (32) by extruding a strand of the mixture (26) into water (28) and ...	05/14/1985
4490072	Drainage device The drainage device includes a stiff plastic core having rigid raised portions and valleys therebetween is oriented vertically and tangentially to a drain pipe which has axially spaced raised annular portions contacting the core and annular recesses with ...	12/25/1984
4430020	Drip irrigation hose A drip irrigation hose which is characterized by a tubular hose member having a major or primary channel or conduit and a secondary regulatory conduit or channel plate laminated between the lapped edge portions of the major channel with one edge of the se...	02/07/1984
4398842	Method of overlay and sandwich formation of pervious concrete A method of overlay and sandwich formation of a combination of pervious concrete with itself and/or standard cement concrete wherein the existing surface is cleaned either mechanically or chemically, a coating of cement and water mortar, mixed in a high e...	08/16/1983
4360042	Arched conduit with improved corrugations A foldable conduit has a generally parabolic arched portion and a flat base. The arched portion comprises a pair of corrugated side walls which are connected with a hinge. The corrugations comprise alternating peak portions and valley portions. Each peak ...	11/23/1982
4335169	Slotted concrete pipe Concrete pipe including a hollow tube of concrete with a grid of reinforcing bars embedded therein. A plurality of inserts are embedded in the concrete pipe in between the bars of the grid and have passageways therethrough to form slots between the interi...	06/15/1982
4328640	Rope wick A rope wick for selectively applying liquid chemicals to plants. The rope wick comprises an outer covering made of braided polyester yarn and an inner core made of spun acrylic yarn....	05/11/1982
4318892	Heap leaching device Disclosed is a hollow, elongated heap leaching device for use in above-ground leaching of metal bearing ores. The device has an annular cross-section, an inlet opening near its upper end, a restriction or closure at or near its lower end and narrow slits ...	03/09/1982
4309855	Wall drainage system A wall drainage system for protecting foundations and basement walls from water contact and seepage and including a water-impermeable synthetic resin backing plate adapted for securement to a surface to be protected and defining drainage channels along on...	01/12/1982
4288321	Drain tile and pile fabric filter sleeve A land drainage line having a tube or the like forming a conduit through which water will be drained and a knitted pile fabric filter sleeve around the drainage line....	09/08/1981
4246936	Pipe for trickle irrigation A drip irrigation pipe for use aboveground having conical apertures in the wall of the pipe at spacings corresponding to the space between the plants to be irrigated. The apertures diverge from the inside to the outside of the wall, with a center line mak...	01/27/1981
4245924	Arch conduit Disclosed is a foldable arched conduit suitable for use as drain tubing, culverts and the like. The conduit has the cross section of a parabolic arch with a flat base. The arched portion of the conduit comprises a pair of rigid corrugated plastic walls jo...	01/20/1981
4235561	Subterranean irrigation means and system A porous, or semi-permeable, pipe is placed below the surface of the soil in the area to be irrigated and a flow of water maintained therein. This avoids such practices as sprinkling, furrowing or ditching, and subsequent cultivation, and thereby permits ...	11/25/1980
4192628	Flow distributor for leaching fields 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...	03/11/1980
4182582	Porous tubes and hollow profile structures and method of making same A method of producing porous tubes and hollow profile structures is characterized by coextruding different materials each through a separate section of a tube-forming extrusion die, one material being pore-forming and producing a porous wall section exten...	01/08/1980
4168799	Soaker hose A porous flexible hose primarily of crumbed rubber and synthetic rubber reclaimed from rubber tires, ground to a relatively small granular size, with metal removed; such as, for example, would pass through a 30-mesh screen, process-mixed through an extrud...	09/25/1979
4162863	Device for soil irrigation An irrigating device formed from an absorbent product, such as a polymeric pulp or hydrophilic textile contained within a filtering envelope, such as a woven, knitted or non-woven fabric. The device is placed in the ground in communication with a source o...	07/31/1979
4142325	Channel culture array A channel culture device for agricultural is disclosed. A plurality of elongated reservoir channels are provided adjacent growing channels. The reservoir channels which may be above or within the soil, provide metered amounts of water and nutrients to the...	03/06/1979
4118940	Drain line and method of installing A drain line and a method of installing a drain line in a field in which a plurality of drain tiles each of determinant length are drawn into and maintained in alignment within a trench by means of an elastic, permeable, tubular knit fabric sleeve having ...	10/10/1978
4110420	Method for extruding porous irrigation pipe A porous pipe primarily of rubber and synthetic rubber reclaimed from rubber tires, ground to a relatively small granular size, with metal removed; such as, for example, would pass through a 30-mesh screen, process-mixed through a pipe extruder, with a mu...	08/29/1978
4101774	X-ray system having a driving mechanism for an X-ray source and an X-ray detector The tomography movements of the X-ray source and detector are matched electronically to each other by comparing the positions thereof. Via a memory, a weighed position for the source is determined with reference to a desired velocity ratio and the positio...	07/18/1978
4061272	Irrigation device An irrigation device in the form of an elongated conduit of predetermined length wherein the conduit comprises a one piece wall of plastic material formed by extrusion in a continuous length. The conduit comprises at least two compartments having specific...	12/06/1977
4019326	Nonwoven horizontal drainage system A horizontal soil drainage system consisting of a nonwoven three-dimensional mat of a plurality of looped, intersecting and substantially amorphous filaments of melt-spun synthetic polymers bonded together at their intersections, at least one of the outer...	04/26/1977
4003122	Apparatus and method for applying filter to a drainage tubing Apparatus and method for applying a filter sleeve to a continuous length of drainage tubing. The filter sleeve is gathered and packed endwise on a tubular mandrel. The mandrel is received within a dispensing canister mounted on trench-digging and drain-la...	01/18/1977
4003408	Underground irrigation porous pipe A porous pipe primarily of rubber and synthetic rubber reclaimed from rubber tires, ground to a relatively small granular size, with metal removed; such as, for example, would pass through a 30-mesh screen, process-mixed through a pipe extruder, with a mu...	01/18/1977
3946762	Underground irrigation system An irrigation or drainage system is provided comprising one or more conduits having radially positioned spaced apertures in the walls thereof, the system being otherwise closed except for an inlet/outlet aperture. The exterior of the conduits is covered b...	03/30/1976
3939875	Permeable flexible plastic tubing Flexible tubing, particularly suitable for irrigation purposes, consists of a plurality of superposed, elongated, flexible strips, heat sealed along their longitudinal edges and is substantially flat when empty. At least one of said strips is thermoplasti...	02/24/1976
3936380	Means to counteract a clogging of drain pipes A plastic or clay drain system includes porous plastic or clay pipes at least partially covered with filter material and a dispenser of tannin for introducing tannin into the drain flow....	02/03/1976

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Class 405/45 - Porous