Pick locking device including a clamp element and a retaining pin

US7503629B2 · kind B2 · utility

Assignee

• DBT GMBH · DE

Inventors

• Adam Klabisch · Dortmund, DE
• Gerhard Siepenkort · Ascheberg, DE
• Klaus Duhnke · Bochum, DE
• Norbert Hesse · Bochum, DE
• Uwe Tillessen · Kamen, DE

Key dates

• Filing date: Dec 28, 2004
• Grant date: Mar 17, 2009
• Expiry date: Mar 24, 2025

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E21C35/188
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A pick locking device for a plow pick that includes a pick shank inserted into a receptor box of a pick holder. The locking device may include a retaining pin and a deformable clamp element. The retaining pin may be forced through an opening on the pick holder into a locking groove extending in a shank insert direction along one side face of the shank. The clamp element may secure the retaining pin in a locked position, and may include a first leg and a second leg positioned at an angle to each other. The first leg may be inserted into a retainer in the pick shank and the second leg may be inserted into a locking recess on the retaining pin. The second leg may include a trunnion protruding from the first leg and an annular enclosed opening that extends to a rear of the first leg.