Patent · US Active

Plastic pipe with bell

US9321210B2 · kind B2 · utility

3Cited by

5References

15Claims

0Family size

Inventors

Timothy R. Toliver · Macedonia, US
Tony Kime · Chapeau, CA
Hubert Kossner · Haßfurt, DE

Key dates

Filing date	Jun 14, 2010
Grant date	Apr 26, 2016
Priority date	—
Expiry date	Jun 1, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T156/1028
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.