| Patent Number |
Title Of Patent |
Date Issued |
| D380813 |
Pipe connector |
July 8, 1997 |
|
| 7451784 |
Corrugated pipe with perforation protecting cover |
November 18, 2008 |
| A pipe having an axially extending bore is defined by a corrugated outer wall having alternating, axially-adjacent, annular crests and valleys. The wall of the pipe has a hole disposed in a valley which provides fluid communication between the bore and the outside. The pipe also has a co |
| 7331582 |
Gasket |
February 19, 2008 |
| An annular gasket for affecting a watertight seal between two sections of corrugated pipe. The gasket comprises a seating portion dimensioned to fit within an annular recess in one of the mated sections of corrugated pipe, and a sealing portion integrally molded with the seating portion. |
| 7306264 |
Pipe having a water-tight in-line bell |
December 11, 2007 |
| In a corrugated pipe comprising two sections joined by telescopically mating a male end of one section with a female end of the other section, an annular sealing element is fixed to the exterior surface of the male end and disposed to sealingly engage the interior surface of the female |
| 7185894 |
Watertight corrugated pipe gasket |
March 6, 2007 |
| A corrugated pipe saddle gasket is provided having a leading member, a primary sealing member, and an arm member, with the gasket having a contoured surface extending along at least a portion of the bottom of the primary sealing member and the arm member corresponding to the shape of a |
| 7052210 |
Inlet collar for highway culverts |
May 30, 2006 |
| A highway culvert inlet collar is disclosed having a plate member and a pipe adapter. The plate member has a front face, a rear face, a peripheral side edge intermediate the front face and the rear face, and a tapered inlet face portion adjacent the front face. The front face has a f |
| 6948718 |
Gasket |
September 27, 2005 |
| An annular gasket for affecting a watertight seal between two sections of corrugated pipe. The gasket comprises a seating portion dimensioned to fit within an annular recess in one of the mated sections of corrugated pipe, and a sealing portion integrally molded with the seating portion. |
| 6783683 |
Stormwater pollutant separation system and method of stormwater management |
August 31, 2004 |
| A stormwater pollutant separator system is provided with the system having a stormwater pollutant separator, a by-pass system, an intake conduit and an outflow conduit connected together. The stormwater pollutant separator includes a chamber with a weir plate and siphon plate therein. Th |
| 6702517 |
Pipe assembly for collecting surface water runoff and associated methods |
March 9, 2004 |
| The present invention includes a pipe assembly for collecting water runoff. The pipe assembly includes a plurality of elongated primary pipes disposed in adjacent contact along their lengths. Each pair of adjacent elongated primary pipes define upper and lower elongated voids between adj |
| 6644357 |
Corrugated pipe with improved profile stability |
November 11, 2003 |
| A corrugated pipe is provided having a pipe structure of an inner wall having an interior surface and an exterior surface, and an outer wall having corrugations, each of the corrugations having an interior surface and an exterior surface, each corrugation having a crown. The pipe str |
| 6572118 |
Flexible seal member for non-metallic conduit to concrete manhole junction |
June 3, 2003 |
| A sealing member for sealing a joint between a pipe and a wall defining an opening is provided. The sealing member has an annular base, a projection, and preferably first and second annular flanges. The annular base has a bottom and first and second sidewalls. The projection is attached |
| 6126209 |
Pipe having an in-line bell |
October 3, 2000 |
| An in-line bell pipe is provided, formed by joining at least two corrugated sections of pipe having a male portion and a female portion to connect the corrugated sections. Each corrugated section has a plurality of first corrugations having a crest and a valley, with the distance between |
| 5945138 |
Cam adjustable former for plastic pipe |
August 31, 1999 |
| An improved former assembly which can be used in the manufacture of plastic pipe with the former assembly comprising a plastic pipe former assembly having a housing, a center tube supported on the housing, and a plurality of rollers oriented about the center tube, with the improvement co |
| 5765880 |
Pipe coupler |
June 16, 1998 |
| A coupler for use with helical double-wall corrugated pipe is disclosed having a spigot portion and a bell portion. The spigot portion has at least one corrugation formed therein, a spigot portion first edge and a spigot portion second edge, and is adapted to screw onto the end of a |
| 5765598 |
Pipe construction |
June 16, 1998 |
| An improved pipe construction is disclosed having an inner and outer surface, intermediate walls extending between the inner and outer surfaces, and a plurality of primary and secondary internal cells. There are twice as many secondary internal cells as there are primary internal cel |
| 5727598 |
Pipe wall segment and pipe having sidewall |
March 17, 1998 |
| An improved pipe construction is disclosed having an inner and outer surface, intermediate walls having a top and bottom, and a plurality of primary internal cells. Each of the primary internal cells has a cell surface wall, collapsible ribs attached to the intermediate walls, collap |
| 5582842 |
Manifold calibration finger |
December 10, 1996 |
| An improved manifold calibration finger which can be used in conjunction with a die head in the extrusion of a plastic with the manifold calibration finger comprising a first section comprising an elongate tubular member having a grooved outer surface and an elongate central channel |
| 5513975 |
Pipe extrusion die head manifold assembly |
May 7, 1996 |
| An improved manifold assembly which can be used in conjunction with a die head in the extrusion of a plastic with the manifold assembly having a water inlet tube, a tube through which a vacuum is pulled, a water return tube, a calibration finger first section, and a calibration finger se |
| 5513974 |
Manifold assembly with atmospheric vent |
May 7, 1996 |
| An improved manifold assembly which can be used in the extrusion of a plastic with the manifold assembly having a die having a first end and a second end, with the die having a die head sectored at the second end, sets of a plurality of tubes located centrally of one another, each set |
| 5505897 |
Method for forming a pipe |
April 9, 1996 |
| A method for manufacturing plastic pipe such that the pipe has apertures formed therein when the pipe is viewed in cross-section, comprising the steps of having hot plastic flow through a die and subsequently be extruded through a die head to form an extruded wall component having fi |
| 5460501 |
Pipe production line for the manufacture of plastic pipe |
October 24, 1995 |
| An improved pipe production line is provided having an improved manifold assembly component and an improved former component. The improved manifold assembly for use with a die in the extrusion of plastic includes a water inlet tube, a tube through which a vacuum is pulled, a water return |
| 5163717 |
Pipe coupler |
November 17, 1992 |
| A coupler for use with pipe is disclosed having a unitary tubular structure with an inner and an outer surface. The inner surface has at least one and preferably three interiorly depending ribs. The outer surface is preferably corrugated and has formed therein a plurality of valleys. The |
| 5123776 |
Plastic fillable manhole cover with penetrating handles |
June 23, 1992 |
| A manhole cover comprises a top having a top surface and an edge portion, a depending portion having a sidewall and a bottom surface, and an interior chamber. The manhole cover is fabricated from a first material, while the interior chamber is at least partially filled with a second mate |
| 5108229 |
Pipe installer and method for installation of pipe |
April 28, 1992 |
| A device for installing pipe is provided comprised of a chassis and pivotal shoe connected to such a chassis. The chassis is formed with a metallic frame supported above the ground by a pair of wheels and at its forwardmost portion by a hitch and skid plate. The chassis includes an u |
| 4904113 |
Highway edgedrain |
February 27, 1990 |
| A hydraulic structure is provided in the form of a flexible, flat, corrugated plastic tube having a relatively oblongated cross-section, with apertures associated with the grooves of the corrugation. The tube is enclosed in a geotextile sheath. The two relatively flat sides or panels |
| 4255107 |
Control apparatus for producing uniform thickness corrugated tubing |
March 10, 1981 |
| Apparatus and method for producing thermoplastic corrugated tubing having substantially uniform thickness throughout comprises extruder and step of forming hollow smooth-walled extrudate. Corrugating structure immediately adjacent extruder is arranged to receive extrudate and to form |
| 4184828 |
Imprinting machine |
January 22, 1980 |
| Machine for imprinting indicia on thermoplastic corrugated tubing comprises framework with structure connected thereto for guiding tubing along predetermined path of travel. Motivator on framework moves tubing along its path of travel, and imprinting structure mounted adjacent path of |
| 4112810 |
Tube slotter |
September 12, 1978 |
| Tube slotting machine for cutting series of transverse slotted openings in flexible corrugated tubing comprises main framework with tube supporting and conveying structure connected thereto for guiding tubing through machine. Cutting structure is adapted to engage tubing as it travels |
| 3936961 |
Apparatus for covering drainage tubing with fine textured soil granules |
February 10, 1976 |
| Device for covering drainage tubing with fine textured soil granules comprises main framework with pair of tillers connected thereto by adjustable connection which varies elevation of tillers relative to main framework. Each tiller includes vertically oriented shaft journaled to seco |
