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:
Nov. 04, 1980
Filed:
Jan. 02, 1979
Applicant:
Inventors:
Harry Rosenberg, Ludinghausen, DE;
Lubomir Plevak, Lunen, DE;
Assignee:
Gewerkschaft Eisenhutte Westfalia, Lunen, DE;
Primary Examiner:
Int. Cl.
CPC ...
E21D / ;
U.S. Cl.
CPC ...
405296 ; 405299 ;
Abstract
A roof support unit for use in a mineral mining working has a roof shield supported on a floor sill by means of at least two hydraulic props. A goaf shield is pivotally linked to both the roof shield and the floor sill. At least one of the hydraulic props is inclined towards the face-side of the unit and engages the roof shield. At least one of the hydraulic props is inclined towards the goaf-side of the unit and engages the roof shield.