Pneumatic transport conveyor

US4715749A · kind A · utility

Assignee

• Waeschle Maschinenfabrik GmbH · DE

Inventors

• Hans Hoppe · Weingarten, DE
• Dieter Heep · Bad Waldsee, DE
• Norbert Eberhard · Ertingen, DE
• Werner Miller · Ravensburg, DE

Key dates

• Filing date: Oct 9, 1985
• Grant date: Dec 29, 1987
• Expiry date: Oct 9, 2005

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65G53/521
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A transport conduit for bulk material is formed of a rigid outer tube and an elastic inner tube of substantially smaller diameter. The inner tube is hermetically sealed at each of its ends to the conduit section so as to form a closed annular chamber between the inner elastic tube and the rigid outer tube. Communicating through the wall of both the outer and inner elastic tubes are relief and check valves sealed with respect to the elastic inner tube so as to maintain the integrity of the annular chambers. The valves are connected to a secondary gas supply from which air under pressure is directed into the conduit to assist in the transport of the bulk material. The annular chambers are serially connected by bridging tubes passing from one section to the adjacent section, thereby interconnecting each of the annular chambers in an outer parallel conduit to permit atmospheric air to move serially through them from one end of the transport conveyor to the other.