High crown anti-rotation bolt

Details High crown anti-rotation bolt High crown anti-rotation bolt

2011-08-09

2011-08-09

Saether, Flemming (Department: 3677)

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

Threaded fastener locked to a discreet structure

Member or portion thereof located between substructure and...

C411S114000, C411S116000, C411S979000

Reexamination Certificate

active

07993086

ABSTRACT:
The present disclosure shows an anti-rotation bolt for fastening reactor plates to prevent subsequent SCC problems wherein the bolt head has a circumferential series of anti-rotation tabs extending from the head of the bolt which are moved in by a restrainer cone which is placed on top of the bolt to allow its insertion into the plates and is removed for locking the tabs into detents formed in one of the plates to provide anti-rotation. The cone is again moved over the tabs during the removal of same leaving the bolt undamaged and fit for reuse.

REFERENCES:
patent: 801714 (1905-10-01), Ferrin
patent: 3419057 (1968-12-01), Hogan
patent: 4185937 (1980-01-01), Anderson
patent: 4303476 (1981-12-01), Leclercq
patent: 4534101 (1985-08-01), Rosan, Jr.
patent: 4668469 (1987-05-01), Widener
patent: 4711760 (1987-12-01), Blaushild
patent: 4812094 (1989-03-01), Grube
patent: 5606753 (1997-03-01), Hashimoto
patent: 5683216 (1997-11-01), Erbes
patent: 5725344 (1998-03-01), Petrella
patent: 6164886 (2000-12-01), Matarazzo et al.

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