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:
Oct. 06, 1981
Filed:
Nov. 28, 1979
Harry Rosenberg, Ludinghausen, DE;
Norbert Holken, Lunen, DE;
Gewerkschaft Eisenhutte Westfalia, Lunen, DE;
Abstract
A mine roof support has a roof-engaging frame structure supported by hydraulic props on a floor frame and pivotably linked to a goaf shield. The roof frame and goaf shield have L-shaped seal plates at their sides. The seal plates are subjected to a lateral-outwardly-biasing spring force by means of springs and push rods accommodated in guide bores in both the roof frame and goaf shield. To adjust the distance between the plates, there are piston and cylinder units and coupling rods likewise accommodated in guide bores in both the roof frame and goaf shield. The seal plates of the roof frame overlap with those of the goaf shield. The plates are reduced in thickness at their overlapping regions and are pivotably interconnected thereat to correspond to the pivotal connection between the roof frame and the goaf shield. To facilitate assembly in situ, detachable push-in pins are located in bores in the coupling rods and push rods and in lower transverse walls of both the roof frame and goaf-shield. The pins fix the seal plates in a set position with clearance between the overlapping regions of the plates.