Catalytic converter having hollow, gas-filled mounting means for a monolithic catalyst
US3948611A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 10, 1974 |
| Grant date | Apr 6, 1976 |
| Priority date | — |
| Expiry date | Jun 10, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalytic gas treatment apparatus in which a unitary catalytic element, having gas flow paths therethrough, is positioned within a surrounding casing. At least one, and preferably two, end flanges are provided and are positioned in a direction inwardly with respect to the casing and are adjacent the catalytic element end faces. Expansible and/or resilient retention members are positioned between the end flanges and the catalytic element end faces to expand as differences in thermal expansion rates result in differences in the distance between the end flanges and the catalytic element end faces. Consequently, untreated gas cannot pass between the catalytic element outer surface and the casing inner surface, and damage of the catalytic element end faces by the end flanges is lessened during vibration of the apparatus while operating at a high temperature. In one embodiment, the expansible retention members are bimetallic washers shaped similar to a Belleville spring, while in another embodiment, they are hollow, gas-filled, thin metal shell pleated gaskets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.