Transition on the fly

US9551115B2 · kind B2 · utility

Assignee

• Wirtgen GmbH

Inventors

• Michael Engels · Montabaur, DE
• Matthias Fritz · Petershohn, DE
• Martin Lenz · Graz, AT
• Cyrus Barimani · Rübhausen, DE
• Günter Hähn · Rübhausen, DE

Key dates

• Filing date: Dec 19, 2014
• Grant date: Jan 24, 2017
• Expiry date: May 7, 2035

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E01C2301/18
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A system for varying the width of a molded concrete slab on the fly as the slab is being molded. Position and height of the paving machine relative to an external reference system are determined and controlled using at least two 3D stringless reference objects. An additional sensor provides a signal corresponding to a frame width and thus a concrete slab width, and an actuator controls the frame width actively as the paving machine advances.