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US 6,419,358 B1Granted
Pseudoelastic β titanium eyeglass components
AssigneeMemry Corporation
InventorsL. McDonald Schetky, Ming H. Wu, Chi-Yuan Lei
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AssigneeMemry Corporation
InventorsL. McDonald Schetky, Ming H. Wu, Chi-Yuan Lei
Estimating the term…
A new eyeglass frame, eyeglass frame component and method for making eyeglass frames or parts thereof of a nickel-free titanium based SMA. A pseudoelastic β titanium alloy is used which has superior fabricating characteristics combined with weldability with pseudoelastic properties over the temperature range of −25° C. to 50° C. making this alloy ideally suited for the manufacture of various eyeglass components. The disclosed eyeglass component alloy is a β titanium alloy contains alloying elements of molybdenum between 10.0 and 12.0 weight percent, aluminum between 2.8 and 4.0 weight percent, chromium and vanadium between 0.0 and 2.0 weight percent, and niobium between 0.0 and 4.0 weight percent. The eyeglass components fabricated from this alloy exhibit a strain recovery of up to 3.5% deformation, a lower stiffness than conventional binary nickel titanium alloys yielding superior wearer comfort.
In an eyeglass frame having at least one component thereof being fabricated of a shape memory effect alloy, the improvement comprising said component including at least one of a pair of temples, a bridge, a pair of lens rims and nose pads wires, said component being made of a β titanium alloy which comprises:
In a method for making at least one component of an eyeglass frame, the improvement comprising the steps of:
Dependencies are inferred from the claim text.