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. 19, 1982
Filed:
Oct. 10, 1979
William R Cobb, Murrysville, PA (US);
Schroeder Brothers Corporation, McKees Rocks, PA (US);
Abstract
A drill steel guide or clamp for use with mine roof drilling and bolting machines which guides and clamps the drill steel relative to a standard but which can be kicked out of the way by the advancing drill pod after which time the guide is no longer required for the particular bolt hole being drilled. The clamped guide comprises a clevis body pivotally secured to the standard having two retaining arms individually pivotally mounted to the clevis for rotation into clamping and guiding relation with the drill steel. A unique palm lock comprises extensions for embracing the retaining arms to prevent rotation of the arms out of guiding relationship with the drill steel. The palm lock is arranged to be unlatched when struck by the drill pod or kick plate attached thereto as the drill pod pushes the guide out of the way as it advances.