Pipes and tubular conduits – Plural duct
Patent
1973-05-02
1976-01-06
Goldstein, Herbert
Pipes and tubular conduits
Plural duct
23288F, 252477R, B01J 806, F16L 916
Patent
active
039305228
ABSTRACT:
Sintered ceramic articles having a high surface area-to-weight ratio and containing a plurality of ducts that extend through the article to permit fluid flow therethrough are prepared by forming an extrudable admixture of pulverized ceramic material. The admixture is forced through a forming zone in which initial shearing forces form the admixture into a plurality of discrete ribbons, and the discrete ribbons are flowed into the upstream ends of a plurality of spaced, longitudinally-extending members to form a web member containing a plurality of longitudinally-extending ducts as the ribbons flow together about the members. Monolithic ceramic structures formed by the above-described process and including hexagonally-packed circular ducts, that is, circular ducts surrounded by six other circular ducts with each surrounding duct spaced an approximately equal distance from the axis of the circular duct it surrounds, exhibit a desirably high ratio of transverse compressive strength to longitudinal compressive strength.
REFERENCES:
patent: 2742437 (1956-04-01), Houdry
patent: 3295919 (1967-11-01), Henderson et al.
patent: 3502596 (1970-03-01), Sowards
patent: 3568723 (1971-03-01), Sowards
patent: 3641763 (1970-09-01), Iole
patent: 3790654 (1974-02-01), Bagley
patent: 3799796 (1974-03-01), Hunter
patent: 3824196 (1974-07-01), Benbow et al.
Brunsvold, Esq. Brian G.
General Refractories Company
Goldstein Herbert
Murray, Jr., Esq. Everett H.
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