Patent · US Expired

Powered support frame for large seam thicknesses with controlled gap sealing plates

US6481933B1 · kind B1 · utility

0Cited by

9References

11Claims

0Family size

Assignee

DBT Deutsche Bergbau-Technik GmbH · DE

Inventors

Michael Dettmers · Kamen, DE
Ulrich Hilker · L Atkinson Lane, DE

Key dates

Filing date	Nov 6, 2000
Grant date	Nov 19, 2002
Priority date	—
Expiry date	Nov 6, 2020

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21D23/03
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

It is provide in a powered support frame, for large seam thicknesses with controlled gap sealing, that double acting gap cylinders (16, 27, 30) of several gap sealing elements (15) on a powered support frame are connected to a common pressure feed line (34, 37, 39) and to a common pressure return line (50) and are impacted with a uniform pressure when the gap sealing elements are to be extended.

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