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:
Aug. 30, 2011
Filed:
Oct. 14, 2008
Kristian S. Drivdahl, Park City, UT (US);
Robert Eugene Able, Bozeman, MT (US);
Todd A. Nevenner, Murray, UT (US);
Kenneth Carl Altrichter, Little Falls, MN (US);
Kristian S. Drivdahl, Park City, UT (US);
Robert Eugene Able, Bozeman, MT (US);
Todd A. Nevenner, Murray, UT (US);
Kenneth Carl Altrichter, Little Falls, MN (US);
Longyear TM, Inc., South Jordan, UT (US);
Abstract
A drill head assembly includes a shaft having a shaft axis, an oscillator assembly operatively associated with the shaft, the oscillator assembly having at least one eccentrically weighted rotor configured to rotate about a pivot point to generate an oscillating vibratory force, wherein an oscillation centerline is defined transverse to the shaft axis and including the pivot point. The drill head assembly also includes a lower bearing coupled to the shaft on a first side of the oscillation centerline and an upper bearing coupled to the shaft on a second side of the oscillation centerline, the second side being opposite the first side.