Free venting pipe and method of manufacture
US8714204B2 · kind B2 · utility
5Cited by
28References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 18, 2006 |
| Grant date | May 6, 2014 |
| Priority date | — |
| Expiry date | Sep 24, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1393
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A free venting pipe and method of forming same, comprising a permeable tubular core member with at least one permeable hoop reinforcement layer around the core member; a substantially non-permeable membrane layer positioned outside of the hoop reinforcement layer and at least one permeable tensile reinforcement layer positioned outside of the membrane layer whereby a free volume annulus does not exist between any of the layers of the free venting pipe. The hoop and tensile reinforcement layers are comprised of a laminate construction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.