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
Heinrich Heine, Duisburg, DT;
Rheinstahl AG, , DT;
Abstract
A device for sealing a roof of an excavation, such as a mine shaft, including a wide surface support member or cave-in shield, which is adapted to be supported in the excavation at an angle to the roof. An open top wide surface roof cap structure is pivoted to the upper end of the support member and it comprises a plurality of nested substantially U-shape members having widely spaced apart legs which are pivoted to the upper end of the support member and which extend downwardly in the form of a shutter or bellows to the support member. The widest one of the U-shape members is formed as an extension of the horizontal portion and the intermediate ones are disposed at separate respective angles closing the space between the cap and the support member.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile