Large-area washer having friction increasing elements on the underside thereof
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United States of America Patent
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-
Jun 29, 1999
Grant Date -
N/A
app pub date -
Jul 26, 1996
filing date -
Dec 10, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In a large-area washer (1) there is an aperture for the insertion of a fastener and a bead (16) to stiffen the washer (1). To provide better engagement with a plate and/or web to be fastened, there are engagement components (13) on the underside of the washer (1) which are pressed out of the whole material of the washer (1) and project approximately perpendicularly downwards from it. The engagement components (13) are conical or truncated cones.
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Cited Art Landscape
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