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:
Jan. 25, 1977
Filed:
Mar. 05, 1975
Lubomir Plevak, Lunen, Horstmar, DT;
Norbert Holken, Altlunen, DT;
Gewerkschaft Eisenhutte Westfalia, Lunen, DT;
Abstract
A ball-and-socket type connection particularly intended for interconnecting a prop and a roof bar or floor rail of a mine roof support assembly. The connection has a socket formed on the bar or rail and a ball part formed on the prop. The socket part has a curvilinear inner wall portion which receives the ball part and a rectilinear frusto-conical outer wall portion which widens outwardly of the socket part to form a mouth. The ball part has a bore or recesses which receives a securing means which may be a onepiece or multi-part elongate structure. The securing means extends into the socket part to engage with the bore or recesses in the socket part and lies alongside the outer wall portion of the socket part. The securing means is detachably connected to the bar or rail in a position readily accessible from the side adjoining the mouth of the socket part when the connection is in use.