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:
Jul. 13, 2004
Filed:
May. 06, 2002
Applicant:
Inventors:
Matthew L. Dock, Stillwater, OK (US);
Richard Felix Sharp, Perry, OK (US);
Floyd R. Gunsaulis, Perry, OK (US);
Assignee:
The Charles Machines Works, Inc., Perry, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 1/00 ;
U.S. Cl.
CPC ...
E21B 1/00 ;
Abstract
A percussive tool adapted to receive rotational energy from the inner member of a dual-member drill string. In a preferred embodiment the percussive tool has a hydraulic pump, driven by a drive member, to operate the hammer assembly. In another preferred embodiment the percussive tool has a rotary-driven cam assembly adapted to mechanically operate the hammer assembly. This invention provides increased control and efficiency for the use of percussive force in horizontal directional drilling operations.