Metallic nut for use with ceramic threads

Details Metallic nut for use with ceramic threads Metallic nut for use with ceramic threads

1994-06-27

1996-07-23

Wilson, Neill R.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Internally threaded fastener element, e.g., nut, etc.

Thread structure

411310, 411324, 411947, F16B 3716, F16B 3930

Patent

active

055383807

ABSTRACT:
A nozzle guide vane assembly has ceramic components therein having a conventional thread thereon including a preestablished pitch and having a preestablished rate of thermal expansion. The nozzle guide vane assembly has a metallic components therein having a preestablished rate of thermal expansion being greater that the rate of thermal expansion of the ceramic components is positioned in a gas turbine engine. The metallic component, a nut, has a thread therein including a plurality of crests being spaced on a pitch equal to that of the ceramic component and has a pair of contacting surfaces extending from the plurality of crests. A notch spirally extends intermediate adjacent ones of the plurality of crests and has a preestablished depth which is at least twice the size of the conventional pitch. Furthermore, the pair of contacting surfaces are in contact with only a portion of the threaded surface of the ceramic components.

REFERENCES:
patent: 2116036 (1938-05-01), Money
patent: 2156169 (1939-04-01), Unke
patent: 2263644 (1941-11-01), Pierce
patent: 2349651 (1944-05-01), Davis
patent: 3412773 (1968-11-01), Breed

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