Device for measuring the extension of a threaded bolt or screw

US6131302A · kind A · utility

Inventors

• Jörg Hohmann · Meschede, DE
• Frank Hohmann · Warstein, DE

Key dates

• Filing date: Jan 8, 1998
• Grant date: Oct 17, 2000
• Expiry date: Jan 8, 2018

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16B39/282
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A measuring device for measuring the extension of a threaded bolt or a screw tightened by a nut has an extension measuring scale provided at a circumference of either the nut, of a screw head of the screw, or of a tightening element rotatable relative to the nut or the screw head of the screw. Reference marks for the measuring scale are arranged stationary relative to the extension measuring scale.