Title:
PROCESS FOR PRODUCING TUBULAR CERAMIC STRUCTURES OF NON-CIRCULAR CROSS SECTION
Document Type and Number:
WIPO Patent Application WO/2013/033512
Kind Code:
A3
Abstract:
A process for producing tubular ceramic structures (10) of non-circular cross section is provided which comprises: • a) rotating a mandrel-spindle assembly (45) having a non-circular external cross section corresponding to the non-circular internal cross section of the tubular ceramic structure (11) to be produced, the mandrel-spindle assembly (45) comprising a mandrel component (47) and a spindle component (43), the mandrel component (47) being a heat shrinkable polymeric tube of non-circular cross section the external surface of which corresponds to the internal surface of the tubular ceramic structure (11) of non-circular cross section to be produced and the internal surface of which defines a bore (71), the spindle component (43) having a non-circular cross section corresponding to that of the bore (71) of the mandrel (47) and being in close fitting but slidably removable contact therewith; • b) applying a ceramic-forming composition to the external surface of the mandrel component (47) of the rotating mandrel-spindle assembly (45) to produce a tubular ceramic structure (11) of non-circular cross section the internal surface of which is in contact with the external surface of the mandrel (47); • c) removing the spindle (43) from the bore (71) of the mandrel (47) to provide a mandrel-tubular ceramic structure assembly (70) in which the interior surface (75) of the tubular ceramic structure (11) of non-circular cross section remains in contact with the external surface of the mandrel (47); and, • d) heat shrinking the mandrel component (47,76) of the mandrel-tubular ceramic structure assembly (70) to cause the mandrel (47,76) to undergo shrinkage to a reduced size in which the external surface (77) of the mandrel (76) separates from the interior surface (75) of the tubular ceramic structure (11) of non-circular cross section facilitating removal of the mandrel (76) therefrom.
Inventors:
FINNERTY CAINE M (US)
EMLEY BENJAMIN J (US)
EMLEY BENJAMIN J (US)
Application Number:
PCT/US2012/053305
Publication Date:
June 27, 2013
Filing Date:
August 31, 2012
Export Citation:
Assignee:
WATT FUEL CELL CORP (US)
FINNERTY CAINE M (US)
EMLEY BENJAMIN J (US)
FINNERTY CAINE M (US)
EMLEY BENJAMIN J (US)
International Classes:
H01M8/12; B28B7/30; B28B7/34; B28B21/44; B28B21/88; B28B21/90; C23C4/18; C23C24/04; H01M4/88; H01M8/00; H01M8/24
Domestic Patent References:
| WO2002060620A1 | 2002-08-08 |
Foreign References:
| US20030186100A1 | 2003-10-02 | |||
| JPH05101842A | 1993-04-23 | |||
| US20100086824A1 | 2010-04-08 | |||
| US20070141424A1 | 2007-06-21 | |||
| GB2067459A | 1981-07-30 | |||
| US7422714B1 | 2008-09-09 | |||
| US20050042490A1 | 2005-02-24 | |||
| NL8302819A | 1985-03-01 | |||
| JPH09193127A | 1997-07-29 | |||
| GB1258262A | 1971-12-30 |
Attorney, Agent or Firm:
DILWORTH, Peter, G. et al. (LLP1000 Woodbury Road, Suite 40, Woodbury NY, US)
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