Insulating material for automotive exhaust line tubing and manifolds
US8627853B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2007 |
| Grant date | Jan 14, 2014 |
| Priority date | — |
| Expiry date | Jun 21, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L59/147
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An insulated double-walled pipe including an inner pipe, an outer pipe surrounding the inner pipe to provide a substantially uniform annular gap between the inner and outer pipes, and optionally an annular flange connected to at least one end of the inner and outer pipe, wherein the annular gap is substantially filled with an insulating paste comprising a fiber component, an inorganic binder component, and optionally a vermiculite component, a filler component, and an organic binder component. A method for preparing the insulated double-walled pipe includes providing a double-walled pipe having an annular space between the walls; introducing an insulating paste material into the annular space; freezing the insulating paste material in the pipe; bending the pipe; and thawing and gelling the paste material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.