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US 7,352,792 B2Granted
Enhanced joints for pins and electrodes with asymmetric properties
AssigneeGrafTech International Holdings Inc.
InventorRobert E. Smith
Life of this patent
Estimating the term…
Abstract
A joint for connecting two carbon members, with at least one carbon member having an asymmetrical coefficient of thermal expansion. The carbon member having the asymmetrical coefficient of thermal expansion also has either a male tang or a female socket with an elliptical cross section selectively oriented to the asymmetrical coefficient of thermal expansion.
Claims6
A carbon member, comprising:
- (a) a carbon body having two end portions and a longitudinal axis extending therebetween, wherein the coefficient of thermal expansion of the carbon body is asymmetrical across its cross-sectional dimension;
- and
- (b) a male tang formed in at least one of the end portions of the carbon body, wherein the male tang is at least partially threaded and is formed so as to assume an elliptical cross section in a plane normal to the longitudinal axis of the carbon body, the elliptical cross section comprising a long axis and a short axis, and further wherein the long axis is selectively oriented with respect to the asymmetrical coefficient of thermal expansion of the carbon body.
Dependencies are inferred from the claim text.