Mandrel for producing quartz glass and production method for...

Details Mandrel for producing quartz glass and production method for... Mandrel for producing quartz glass and production method for...

2007-04-03

2007-04-03

Heckenberg, Donald (Department: 1722)

Static molds

Core

Of plural sections

C249S175000, C425S468000

Reexamination Certificate

active

10343167

ABSTRACT:
A mandrel for producing a large quartz glass body, comprising at least two columnar or cylindrical, carbon fiber-reinforced carbon composite members and joined in series by screw thread parts, wherein preferably the contact surface of the screw thread parts of the mandrel is impregnated and/or coated with carbon, and more preferably a reinforcing member made of a C/C composite is provided on the outer periphery of the screw thread parts.

REFERENCES:
patent: 4233052 (1980-11-01), Dominick et al.
patent: 5282734 (1994-02-01), Pastureau et al.
patent: 5350139 (1994-09-01), Leyderman
patent: 5665132 (1997-09-01), Ruppert et al.
patent: 5738702 (1998-04-01), Ruppert et al.
patent: 163752 (1985-12-01), None
patent: 63-147840 (1988-06-01), None
patent: 4-331811 (1991-04-01), None
patent: 9-202632 (1997-08-01), None
patent: 11-278857 (1999-10-01), None
Colvin et al, American Machinists' Handbook and Dictionary of Shop Terms, 7th ed., 1940, pp. 7, 43,46,47, 51.
English Abstract for JP 4-331811.

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