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:
Mar. 11, 2025
Filed:
Jul. 13, 2022
Vale S.a., Rio de Janeiro, BR;
Enilton Edson Frade, Itabira, BR;
Bruno Fonseca Vaz, João Monlevade, BR;
Arlem Flávio De Sena, Itabira, BR;
VALE S.A., Rio de Janeiro, BR;
Abstract
A device for unlocking bits from a drill, the drill comprising an articulated drill string with a percussion hammer that receives bits at its end, the device for bit unlocking comprising a decoupling wrench which is mounted on the drill and being movable between an extended position, in which the decoupling wrench is aligned with a drill hole of the pivotable drill string, and between a retracted position, in which the decoupling wrench is away from the pivotable drill string, wherein the decoupling wrench comprises: a central slot for receiving the bit coupled to the percussion hammer, and a wide range of recesses located on the inner surface of the central slot, wherein the recesses are arranged to accommodate protrusions of the bit of the percussion hammer and prevent rotational movement of the bit when the bit is accommodated in the decoupling wrench.