Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Internally threaded fastener element – e.g. – nut – etc. – Multipart
Reexamination Certificate
2011-04-12
2011-04-12
Saether, Flemming (Department: 3677)
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Internally threaded fastener element, e.g., nut, etc.
Multipart
C411S437000
Reexamination Certificate
active
07922434
ABSTRACT:
A laminated nut includes a conical spring, top disc and a conical spring, bottom disc stacked upon each other defining a laminated stack having a common central bore and an outer wrench engaging surface. A generally cylindrical tension sleeve is located in the central bore. The tension sleeve has an outer wall shaped to substantially conform with the shape of the central bore and an inner wall which is threaded. The tension sleeve has a first end and a second end, the first end of the tension sleeve includes an outwardly extending upper flange and the second end includes an outwardly extending bottom flange, the upper flange and the bottom flange are shaped and dimensioned to retain the top disc and the bottom disc in a stacked relation with the tension sleeve fixedly secured to the laminated stack, such that the conical spring discs and tension sleeve rotate together as a unit.
REFERENCES:
patent: 1425725 (1922-08-01), Trepier
patent: 1475907 (1923-11-01), Volman
patent: 1945005 (1934-01-01), Vacher
patent: 1969223 (1934-08-01), Kotvis et al.
patent: 2399107 (1946-04-01), Eckenbeck et al.
patent: 3058386 (1962-10-01), Morrow
patent: 3497890 (1970-03-01), Coyle
patent: 4897006 (1990-01-01), Blin
patent: 5085550 (1992-02-01), Kendrick
patent: 7670092 (2010-03-01), Reynolds
Saether Flemming
Welsh Flaxman & Gitler LLC
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