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. 30, 1976
Filed:
Sep. 22, 1975
Applicant:
Inventor:
Colin Henry Pike, Wolverhampton, EN;
Assignee:
GKN Sankey Limited, , EN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E04G / ;
U.S. Cl.
CPC ...
248356 ; 188 / ;
Abstract
A yieldable mining stilt comprises a tube formed with diammetrically opposite, longitudinally extending slots. A bar spans the tube and has its end portions engaged in the slots. The relative dimensions of the end portions of the bar and of the slots are such that movement of the bar along the slots causes deformation of the tube adjacent to the slots. In use, the bar supports the leg of a roof arch. There may be two bars, one above the other, the upper one reversing the deformation caused by the lower one.