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:
May. 09, 2006
Filed:
Nov. 20, 2002
Fredrik Egerstrom, Nacka, SE;
Fredrik Egerstrom, Nacka, SE;
Wassara AB, Stockholm, SE;
Abstract
In a liquid downhole drilling machine, the guiding bushing () for the drill bit is rotatably journaled in the housing () and, via a one-way coupling (), coupled to a turning sleeve () that has axial ridges () that bound a number of chambers () and form turning pistons for turning the turnable sleeve to and fro. A number of these chambers are coupled to be pressurized and depressurized simultaneously with said pressure chamber () with the piston area () for urging the piston hammer () forwards. As a result, the drill bit () will be indexed a defined angle between each impact so that the button inserts of the drill bit will change contact points with the rock between every impact and fragment the rock efficiently. The drill tube is not rotated.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile