Cutting bit assembly

US10677054B2 · kind B2 · utility

Assignee

• Joy Global Underground Mining LLC · US

Inventors

• Randy W. Arnold · New Castle, US
• James E. Folkerts · Centralia, US
• John R. Frederick · Richfield, US
• John Hallberg · Peachtree City, US
• James Krellner · Chambersburg, US
• David Meade · Grand Haven, US
• Bulent Tiryaki · Chambersburg, US
• Charles Simon James Pickles · Irishtown, GB
• PETER ROBERT BUSH · Woodstock, GB
• Christopher John Howard Wort · Gosport, GB
• Serena Bonetti · Woodstock, GB
• Bernd Heinrich Ries · Hünfeld, DE
• Markus Kilian Scharting · Frankfurt, DE

Key dates

• Filing date: Jul 29, 2016
• Grant date: Jun 9, 2020
• Expiry date: Jul 29, 2036

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21C35/1933
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A cutting bit assembly for a mining machine includes a holder having a first surface, a second surface, and a bore extending therebetween, and a bit having a first end and a second end. The bit further includes a tip, a shank, and a shoulder positioned between the tip and the shank. The shank is positioned in the bore of the holder and defines a shank axis. The shoulder engages the first surface of the holder. The shank includes a projection adjacent the second end. The cutting bit assembly also includes a retainer having a groove and a resilient member. The groove engages a portion of the projection. The resilient portion engages the second surface of the holder and biases the retainer along the shank axis and away from the holder.