Timothy R Toliver, Age 68741 Iroquois Trl, Macedonia, OH 44056

6840285, Jan 11, 2005

Apr 4, 2002

10/468089

Timothy R. Toliver - Findlay OH, US
Bill Russell Vanhoose - Findlay OH, US

Hancor, Inc. - Findlay OH

F16L 1111

138121, 138122, 138173, 138177

A corrugated pipe () has a plurality of corrugation structures () positioned adjacent one another. The corrugation structures () comprise an inner cylindrical wall (), two annular wall portions () that extend outwardly from the inner cylindrical wall (), and a bowed annular wall portion () that is connected to the outer ends () of the two annular wall portions (). The corrugation structure () includes a centroid () and at least a portion of the inner surface () of the bowed wall portion () has a radius Rcentered on the centroid () and at least a portion of the outer surface () of the bowed wall portion () has a radius and at least Rcentered on the centroid (). The cavity () defined by the corrugation structure () has an inner surface with an inner radius Rcentered on the centroid (). The cavity () defined by the corrugation structure () has a inner surface with an inner radius R, Rthat is equal to or greater than one half the thickness Tof the inner cylindrical wall (). The profile of the corrugation structure () is configured to optimally accept forces caused by backfill soil positioned over the pipe ().

6941972, Sep 13, 2005

Jul 25, 2002

10/205260

Timothy R. Toliver - Findlay OH, US
Bill R. Vanhoose - Findlay OH, US

Hancor, Inc. - Findlay OH

F16L055/04

138 26, 138115, 138120, 138121, 138177

A corrugation has a radially inner wall circumferentially surrounding an axis. The inner wall defines an inner cavity configured to conduct a liquid axially through the inner cavity. A radially outer wall of the corrugation overlies the inner wall. The outer wall adjoins the inner wall so as to form a closed outer cavity bounded by the inner and outer walls and separated from the inner cavity by the inner wall. The inner wall has at least one opening providing fluid communication between the inner and outer cavities for the corrugation to serve as a reservoir for the liquid.

7063108, Jun 20, 2006

Sep 20, 2004

10/944985

Timothy R. Toliver - Findlay OH, US
Bill Russell Vanhoose - Findlay OH, US

Hancor, Inc. - Findlay OH

F16L 11/11

138121, 138122, 138173, 138177

A corrugated pipe has a plurality of corrugation structures positioned adjacent one another. The corrugation structures comprise an inner cylindrical wall , two annular wall portions that extend outwardly from the inner cylindrical wall , and a bowed annular wall portion that is connected to the outer ends of the two annular wall portions. The corrugation structure includes a centroid and at least a portion of the inner surface of the bowed wall portion has a radius Rcentered on the centroid and at least a portion of the outer surface of the bowed wall portion has a radius Rcentered on the centroid. The cavity defined by the corrugation structure has an inner surface with an inner radius R, Rthat is equal to or greater than one half the thickness Tof the inner cylindrical wall. The profile of the corrugation structure is configured to optimally accept forces caused by backfill soil positioned over the pipe. A method of manufacturing a corrugated pipe includes manufacturing a first, a second, and a third corrugated pipe , with each pipe having an inner diameter ID and an outer diameter OD.

2002006, May 23, 2002

Jul 24, 2001

09/912183

Timothy Toliver - Findlay OH, US

F16L017/00

285/374000, 285/903000

A pipe structure includes an annular corrugation centered on an axis. The corrugation has a cylindrical liner centered on the axis, two annular sidewalls extending radially outward from axially opposite ends of the liner, and an annular crown extending axially between radially outer ends of the sidewalls. An annular cavity is centered on the axis and is bounded by the liner, the sidewalls and the crown. A structural filler is contained within the cavity.

2012009, Apr 19, 2012

Jun 14, 2010

13/378211

Timothy Toliver - Bowling Green OH, US
Tony Kime - Chapeau, CA
Hubert Kossner - Hassfurt, DE

ADVANCED PIPE SERVICES, LLC - Bowling Green OH

F16L 9/12
B32B 38/00
B32B 37/12
B23P 19/00
B32B 37/14

138173, 294262, 156212

A multi-layer bell is formed from the outer shell of a multi-layer pipe in a secondary process, thereby allowing the extrusion process to be conducted at normal speeds. The bell may include a strain limiting membrane fused or mechanically secured between the outer shell extrusion layer and the inner liner extrusion layer, increased hoop or circumferential stiffness. This invention allows the extrusion process to be in its simplest form, with no adjustments to the corrugator or extruder speeds.

2016001, Jan 21, 2016

Aug 12, 2014

14/760678

- Willmar MN, US
Joseph Dale Larkins - Willmar MN, US
Timothy R. Toliver - Northfield OH, US

Prinso, Inc. - Willmar DE

F16L 9/18
F16L 9/12

High flow capacity corrugated coilable dual wall plastic pipe having improved longitudinal flexibility and a bend radius sufficient to permit coiling and plowing of such pipe into the ground using automated installation equipment. The coilable dual wall pipe has an outer corrugated wall formed of a thermoplastic material such as high density polyethylene, and an inner smooth wall formed of a different more flexible and resilient thermo-bondable material that has an enhanced strain capacity and lower modulus of elasticity. The inner wall material also has enhanced mechanical properties which generally improve processing and help prevent excessive drag and tearing of the liner material during the manufacturing process. Suitable material blends for the inner wall in corporating a thermoplastic elastomer additive in combination with a thermoplastic material have proven suitable in providing the required longitudinal flexibility and pipe bend radius to permit the desired pipe coiling and plow installation without failure.