Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Washer structure – Including means for retaining washer to fastener
Reexamination Certificate
2007-03-20
2007-03-20
Miller, William L. (Department: 3677)
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Washer structure
Including means for retaining washer to fastener
C411S368000, C411S432000, C411S338000
Reexamination Certificate
active
10139885
ABSTRACT:
An assembly of a threaded fastener and a stemmed washer is provided, such as for applications in which a standoff is desired between a washer and a mating threaded fastener. The stemmed washer includes a washer portion and a standoff portion extending from the washer portion. The threaded fastener has a retaining structure extending about the washer portion and capturing the washer structure in an assembly with the threaded fastener. For example, the retaining structure may have a washer receptacle for the washer portion. The washer portion is captured in the washer receptacle by a deformed catch section below the washer portion.
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STEMS Washer and Screw Assemblies Pamphlet; ITW Shakeproof.
Anderson Jeffrey D.
Homfeldt Kent D.
Fletcher Yoder
Illinois Tool Works Inc.
Miller William L.
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