Retractile-blade utility knife

US8732957B2 · kind B2 · utility

Assignee

• MARTOR KG · DE

Inventor

• Martin Rohrbach · Heubach, DE

Key dates

• Filing date: Oct 21, 2010
• Grant date: May 27, 2014
• Expiry date: Jun 23, 2032

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B26B5/003
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A knife has a housing, an operating part shiftable on the housing between advanced and retracted positions, and a blade holder connected to the part and carrying a blade. The holder is shiftable on the part between offset first and second cutting positions with the blade projecting from the front end and a safety position with the blade recessed in the housing rearward of the front end. A spring biases the holder into the safety position. A brace element can shift between a position braced between the blade holder and the housing in the first cutting position and a position out of engagement with the blade holder or the housing in the second cutting position. The brace element when engaged holds the blade in the first cutting position but in the second cutting position is disengaged so the spring returns the holder to the safety position.