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. 05, 1976
Filed:
Oct. 28, 1975
Manfred Koppers, Duisburg, DT;
Rheinstahl AG, , DT;
Abstract
A roof support structure for excavations comprises a supporting sill beam which is adapted to be anchored in a position below the roof in the shaft or excavation being worked. The sill beam includes a front curved working face forming a closed cover plate and a movable front structure is pivoted on the sill beam at the center of curvature of the cover plate and it has a closed front end plate which is telescopic over the cover plate during pivotal movement. A cave-in shield is pivotaly connected to the outer end of the front structure adjacent the front plate and its opposite end is directed toward the roof and a roof cap structure is pivotally mounted on this end and is positioned against the roof by adjustable hydraulic props which engage against the cave in shield and pivot it to a desired position.