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:
Dec. 01, 1981
Filed:
Nov. 30, 1979
Applicant:
Inventors:
Francis A Haskew, Burton-on-Trent, GB;
Leslie A Jones, Burton-on-Trent, GB;
Assignee:
Coal Industry (Patents) Limited, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21D / ;
U.S. Cl.
CPC ...
299 31 ; 173 56 ; 188 41 ; 188 67 ; 299 33 ;
Abstract
A slideway arrangement comprises a slideway component and a slide component guidably slidable with respect to the slideway component under the action of a hydraulic ram. At least one of the components comprises at least one wedge arrangement and a hydraulic ram for urging the wedge arrangement to releasably wedge one of the components to the other of the components.