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US 5,541,674 AGranted
Dimensionally Stable eyewear
AssigneeOakley, Inc.
InventorJames H. Jannard
Life of this patent
Estimating the term…
Abstract
Disclosed are dimensionally stable eyewear frames, for minimizing visual distortion due to relative movement of the left and right optical zones of the eyewear. In one embodiment, the eyeglass orbitals are investment cast from substantially pure titanium or a titanium based alloy. The bridge may be integrally cast with the lens orbitals, or the parts may be separately formed and assembled later.
Claims7
Dimensionally stable eyeglasses, comprising:
- first and second lenses, having first and second optical zones, respectively;
- and
- a frame connected to the lenses and formed from an investment cast metal to substantially limit movement of the first optical zone with respect to the second optical zone, wherein the minimum cross sectional dimension of the frame, expressed as an average along any one half inch section of the frame, is no less than about 0.040 inches.
Dependencies are inferred from the claim text.