Catalytic converter having hollow, gas-filled mounting means for

Details Catalytic converter having hollow, gas-filled mounting means for Catalytic converter having hollow, gas-filled mounting means for

1974-06-10

1976-04-06

Richman, Barry S.

Chemistry: physical processes

Physical processes

Crystallization

23288F, 60299, 60322, B01J 802, F01N 315

Patent

active

039486117

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.

REFERENCES:
patent: 2850365 (1958-09-01), Adey et al.
patent: 3211534 (1965-10-01), Ridgway
patent: 3687224 (1972-08-01), Lundin
patent: 3754870 (1973-08-01), Carnahan et al.
patent: 3798006 (1974-03-01), Balluff
patent: 3814589 (1974-06-01), Heitland
patent: 3838977 (1974-10-01), Warren

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