Patent · US Expired

Floor cutters for mineral winning ploughs

US4819990A · kind A · utility

6Cited by

4References

4Claims

0Family size

Assignee

Gewerkschaft Eisenhutte Westfalia GmbH · DE

Inventors

Oswald Breuer · Lichtenau, DE
Christoph Rassmann · Grafenau, DE
Egon Pfefferle · Hamm, DE
Gunther-Dietmar Schoop · Ottmarsbocholt, DE

Key dates

Filing date	Nov 2, 1987
Grant date	Apr 11, 1989
Priority date	—
Expiry date	Nov 2, 2007

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21C35/1831
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A floor cutter for a plough has a component provided with cutting edges fixed by welding to a main body locating in a holder. The components are connected together with step-like surfaces chamfered at the external faces of the components to faciliate the welding. Superimposed support surfaces extend more or less normally to other surfaces and permit adjustment of the position of the components during welding to vary the set cutting depth.

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