Eyeglasses with rotationally secured circular lenses, lens jig and method of jig use
US9599839B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Mar 17, 2014 |
| Grant date | Mar 21, 2017 |
| Priority date | — |
| Expiry date | Aug 12, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/55
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Eyeglasses with rotationally secured circular lenses, lens rigs, and methods of use are provided herein. A pair of eyeglasses may include a circular first lens and a circular second lens, each having a lens peripheral surface. At least one of said first lens and said second lens has a line of astigmatism with a prescribed rotational position relative to a wearer eye. The glasses also have a frame having a circular first frame opening into which the first lens is mounted and a circular second frame opening into which the second lens is mounted, each frame opening having an inward frame opening peripheral surface. A lens rotational securing means for securing each of the lenses against rotation relative to said frame, such that the line of astigmatism is prevented from moving out of its prescribed rotational position within its frame opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.