Patent · US Active

Foundation screw with portions of variable diameter

US8484909B2 · kind B2 · utility

2Cited by

4References

11Claims

0Family size

Assignee

Krinner Innovation GmbH · DE

Inventors

Guenther Thurner · Straßkirchen, DE
Martin Thurner · Geisingen, DE

Key dates

Filing date	Nov 4, 2011
Grant date	Jul 16, 2013
Priority date	—
Expiry date	Nov 4, 2031

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE01F9/685
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A foundation screw with a tubular basic body having an encompassing helical screw thread for screwing into the ground. The foundation screw has a substantially cylindrical first longitudinal portion and a tapering second longitudinal portion. The first longitudinal portion merges tangentially with a convex jacket region of the second longitudinal portion having a radius of convexity R1, which has at least one value of the tube diameter D of the first longitudinal portion.

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