US Patent 7478884 Hydraulic switching mechanism for longwall supports
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Patent 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.
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US Patent 07478884 Hydraulic switching mechanism for longwall supports US Patent 7478884 Hydraulic switching mechanism for longwall supports
Infobox
Patent Number
0747888400
Patent Number
747888400
Edits on 31 Mar, 2023
Golden AI
Infobox
Is a
Patent Jurisdiction
Patent Number
074788840
Date of Patent
January 20, 2009
0Patent Application Number
114203170
Date Filed
May 25, 2006
0Official Website
Patent Primary Examiner
Edits on 23 Sep, 2022
Golden AI
Infobox
Is a
Patent Jurisdiction
Patent Number
074788840
Date of Patent
January 20, 2009
0Patent Application Number
114203170
Date Filed
May 25, 2006
0Official Website
Patent Primary Examiner
Edits on 14 Jun, 2022
Golden AI
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US Patent 07478884 Hydraulic switching mechanism for longwall supports
Infobox
Is a
Patent jurisdiction
Patent number
07478884
Date of patent
January 20, 2009
Patent application number
11420317
Date Filed
May 25, 2006
Patent primary examiner
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