Patent · US Active

Screw anchor with conical head for rail attachment

US8434981B2 · kind B2 · utility

4Cited by

5References

11Claims

0Family size

Assignee

Vossloh-Werke GmbH · DE

Inventors

Winfried Bösterling · Neuenrade, DE
André Hunold · Iserlohn, DE
Eugen Gart · Bergneustadt, DE

Key dates

Filing date	Dec 10, 2009
Grant date	May 7, 2013
Priority date	—
Expiry date	Jun 17, 2030

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16B37/125
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A screw anchor for concrete attachment to a railroad tie or solid track comprises external threads (16) disposed on the exterior of the screw anchor (10) and internal threads (18) disposed inside the screw anchor (10) for force-fitted connecting to a fastening element (30), wherein the screw anchor (10) comprises two sections (12, 14) adjacent to one another in the longitudinal direction, the first section (12) having a substantially cylindrical external shape and the second section (14) having a substantially conical external shape, and wherein the second section (14) is disposed between the first section (12) and an inlet opening (26) for the fastening element (30).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.