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:
Oct. 06, 1987
Filed:
Sep. 19, 1986
Howard J Walk, Arlington, TX (US);
Reed Mining Tools, Inc., Grand Prairie, TX (US);
Abstract
The stabilizer extensions are brackets with rollers employed for stabilizing a large boring head when drilling a bore hole in the earth. A hub is provided for attachment to the head. The hub has a plurality of mounting plates located around its axis and radially outward therefrom. Each of the brackets has a bracket mounting plate at one end and a roller mounting plate at the other end. A roller is attached to each of the roller mounting plates for engaging the earth for stabilizing the head. The axis of each of the rollers defines a scalene triangle with two side edges of the bracket mounting plate of its extension bracket. The bracket mounting plate of each of the extension brackets is adapted to be attached to any of the hub mounting plates in a first position or turned 180.degree. and attached thereto in a second position such that the axis of its roller is parallel to the axis of the hub and is located either on one side or the other of a plane extending from the length of the axis of the hub outward and bisecting the bracket mounting plate between its two side edges when the bracket mounting plate is attached to any of the hub mounting plates in said first or second positions.