Method and apparatus for attaching ceramic to metal parts

Details Method and apparatus for attaching ceramic to metal parts Method and apparatus for attaching ceramic to metal parts

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 1/48 (2006.01) F16B 13/08 (2006.01) F16L 55/11 (2006.01) F16B 1/00 (2006.01)

Patent

CA 2080501

A metal valve stem is attached to a ceramic valve plug. An elongated metal screw member has an expandable section securely wedged into a cavity in the plug as the attached screw/ceramic plug are threadably tightened on the valve stem. A first pre-wedging step presses an expander on the screw to fully bend the expander inside the ceramic cavity. The second wedging step during tightening of the screw/plug on the stem ensures uniform loading of the expander on the ceramic cavity surfaces.

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