Optimized elastic belleville fastener useful in eyeglass frames
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United States of America Patent
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Mar 7, 1995
Grant Date -
N/A
app pub date -
Mar 23, 1993
filing date -
Mar 23, 1993
priority date (Note) -
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Abstract
A fastener useful for attaching components of an eyeglass frame together. The fastener includes a pin having a smooth or fluted shank and a belleville washer having a hole for receiving the shank, the hole being sized to provide an interference fit with the washer. The washer is made from a titanium nickel shape memory alloy in an optimized elastic condition. The optimized elastic condition is provided by work hardening a sheet of Ni-Ti and cutting or stamping the washer out of the sheet. The washer is also plastically deformed into a conical shape.
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