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:
Sep. 02, 2008
Filed:
Nov. 27, 2006
Applicants:
Thomas A. Walker, Berlin, PA (US);
Richard Smith, Morrisville, NY (US);
Stephen R. Means, Punxsutawney, PA (US);
Inventors:
Thomas A. Walker, Berlin, PA (US);
Richard Smith, Morrisville, NY (US);
Stephen R. Means, Punxsutawney, PA (US);
Assignee:
Keystone Drill Services, Inc., Somerset, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 10/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
A multi-sectional percussive drill bit assembly for drilling holes in earth formation primarily used in conjunction with a pneumatic percussive device. The drill bit assembly is comprised of an easily removable bit that is rotationally driven by a lug and pocket structure and axially limited in travel by means of retaining members.