Rimless spectacles

US4550989A · kind A · utility

Inventor

• Klaus Hafner · Mühlheim an der Donau, DE

Key dates

• Filing date: Dec 3, 1982
• Grant date: Nov 5, 1985
• Expiry date: Dec 3, 2002

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C1/08
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Rimless spectacles have the lenses which are not held by screws. The nose-bridge and the end-pieces of the temples consist of hook-like clamps that hold and touch the lenses for a short length from the front and/or the back side. These clamps together with a tight-thread or band going all the way around the lenses hold the lenses to the nose-bridge and end-pieces.