Screw anchor for rail attachments

US8840036B2 · kind B2 · utility

Assignee

• Vossloh-Werke GmbH · DE

Inventors

• Winfried Bösterling · Neuenrade, DE
• Dirk Vorderbrück · Werdohl, DE

Key dates

• Filing date: Dec 8, 2010
• Grant date: Sep 23, 2014
• Expiry date: Mar 13, 2031

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16B13/02
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A screw anchor for concrete attachment in a railway sleeper and to a force-fit connection using a rail screw containing a threaded section with external threads disposed on an exterior of the screw anchor and internal threads disposed in the screw anchor; and an upper partial section without external threads which is disposed in a mounted state close to an anchor opening. The screw anchor utilizes material with high elasticity arranged in the upper partial section, wherein this material, when in a mounted state, forms an elevation which extends in an upward direction over an upper side of an end surface of the upper partial section and reduces a free opening section of the inner chamber of the upper partial section.