Powder feed pump and appropriate operating system

US7465130B2 · kind B2 · utility

Assignee

• Durr Systems, Inc. · US

Inventors

• Frank Herre · Oberriexingen, DE
• Hans-Georg Fritz · Esslingen am Neckar, DE
• Thomas Dürr · Magstadt, DE

Key dates

• Filing date: Sep 23, 2004
• Grant date: Dec 16, 2008
• Expiry date: Apr 23, 2026

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65G53/28
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

An operating system for a power feed pump and a power feed pump having a transfer chamber with an inlet and an outlet. The outlet of the transfer chamber is closed, the inlet of the transfer chamber is opened, and a negative pressure is generated in the transfer chamber to suck a powder in through the inlet to the transfer chamber. The inlet of the transfer chamber is closed, the outlet of the transfer chamber is opened, and the powder in the transfer chamber is delivered through the outlet. The negative pressure in the transfer chamber is built up at least partially before the inlet of the transfer chamber is opened.