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Gerhard Wülfing
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Velbert, DE
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last 30 patents
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Patent Grant
Hydraulic circuit for longwall mining
Patent number
8,960,807
Issue date
Feb 24, 2015
Tiefenbach Control Systems GmbH
Wilfried Weigel
F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information
Patent Grant
Hydraulic circuit for longwall support
Patent number
8,876,218
Issue date
Nov 4, 2014
Tiefenbach Control Systems GmbH
Wilfried Weigel
E21 - EARTH DRILLING MINING
Information
Patent Grant
Control device for an extracting unit in the work face of a mine
Patent number
8,726,937
Issue date
May 20, 2014
Tiefenbach Control Systems GmbH
Gerhard Wülfing
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Patents Applications
last 30 patents
Information
Patent Application
CONTROL DEVICE FOR AN EXTRACTING UNIT IN THE WORK FACE OF A MINE
Publication number
20130048093
Publication date
Feb 28, 2013
Gerhard Wülfing
E21 - EARTH DRILLING MINING
Information
Patent Application
HYDRAULIC CIRCUIT FOR LONGWALL SUPPORT
Publication number
20120170981
Publication date
Jul 5, 2012
TIEFENBACH CONTROL SYSTEMS GMGH
Wilfried Weigel
E21 - EARTH DRILLING MINING
Information
Patent Application
Hydraulic Circuit For Longwall Mining
Publication number
20120104829
Publication date
May 3, 2012
TIEFENBACH CONTROL SYSTEMS GMBH
Wilfried Weigel
E21 - EARTH DRILLING MINING