Quick change bit holder with ring magnet

US9156147B2 · kind B2 · utility

Assignee

• BLACK & DECKER INC. · US

Inventors

• Michael P. Peters · Timonium, US
• Mark E. Brunson · Bel Air, US
• Darren B. Moss · Cockeysville, US
• David B. Lee · South San Francisco, US
• Ruth E. Mitchener Keffer · Baltimore, US

Key dates

• Filing date: Feb 13, 2013
• Grant date: Oct 13, 2015
• Expiry date: Jul 5, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T279/32
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A bit holder assembly for a rotary hand or powered tool, includes a body having a hex shank at its rearward end and a retraction collar slidably disposed on the body. The body has a coaxial hex socket formed therein to allow a tool bit to be inserted thereinto. A coil spring biases the retraction collar forwardly and biases a retaining clip toward the bottom of an angular slot formed in the body. The bit is removed by sliding the retraction collar rearwardly, to compress the coil spring and allow the retaining clip to retract back up the slot. A ring magnet is disposed at the forward end of the retraction collar to magnetize a fastener to retain the fastener to the bit.