Tape measure with compact retraction system

US11466970B2 · kind B2 · utility

Assignee

• Milwaukee Electric Tool Corporation · US

Inventors

• Collin J. Nelson · Milwaukee, US
• David Andrew Wortelboer · Springfield, US
• Kyle C. Anderson · Milwaukee, US
• Abhijeet A. Khangar · Waukesha, US
• Jonathan F. Vitas · Muskego, US

Key dates

• Filing date: Dec 21, 2020
• Grant date: Oct 11, 2022
• Expiry date: Dec 24, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G01B2003/103
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A tool, such as a tape measure, including a spring-based retraction system is shown. Various spring-based retraction system embodiments are configured to decrease the size occupied by the spring within the tape measure housing, which consequently reduces tape measure housing size providing a more compact tape measure. Various spring-based retraction system embodiments are configured to control retraction of the tape measure in a manner that reduces whip or otherwise controls tape blade retraction. Some retraction system embodiments utilize a reduction gear train, and others utilize a compression spring and a transmission system that converts rotational movement of the tape reel to axial movement, which compresses the spring.