Interchangeable lens eyeglass system with interchangeable nosepiece
US6428165B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Sep 7, 2001 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Sep 7, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/086
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An apparatus comprising a nosepiece coupled to a pair of annular eyewires, and a pair of clasps hinged to the nosepiece that cooperate with each of two annular eyewires to secure the lenses. Each clasp and eyewire contains a locking hole into which a pin may be inserted to secure the clasp in the closed position. The eyeglasses also contain a pair of temples, each of which is pivotally joined to each of the eyewires. The eyewires have axial markings that indicate the cylindrical axis of the lenses, and bifocal markings that indicate the correct position of the bifocals, so that lenses may be installed and removed without the need for instruments or tools.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.