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. 27, 1987
Filed:
Feb. 21, 1985
Charles L Rassieur, St. Louis, MO (US);
Central Mine Equipment Company, St. Louis, MO (US);
Abstract
In an earth drill rig wherein an upwardly and downwardly moving drill-string-turning rotary table is rotated by a kelly bar connected at its lower end to a vertical drive shaft, the kelly bar being journaled for rotation in and the rotary table being mounted for axial movement on a drill frame assembly, the drill frame assembly being mounted on a vehicle for pivoting between an upright position and a substantially horizontal position for transportation, a frame assembly pivot is positioned below the lower end of the kelly bar and a universal coupling connects the lower end of the kelly bar and the vertical drive shaft.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile