The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 20, 2009
Filed:
May. 25, 2006
Applicant:
Willi Kussel, Werne, DE;
Inventor:
Willi Kussel, Werne, DE;
Assignee:
Tiefenbach Control Systems GmbH, Essen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21D 23/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
A hydraulic switching mechanism for longwall supports. The present invention provides a hydraulic system that is controlled by its own pressure and may be adaptable to those currently in use so that life-threatening and costly faults cannot occur. With the present invention, the retrofitting of existing systems may be made possible without significant expenditure in modification.