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:
Dec. 30, 2014
Filed:
Mar. 15, 2013
Applicant:
Black & Decker Inc., Newark, DE (US);
Inventors:
Wong Kun Ng, New York, NY (US);
Christopher W. Shook, Bel Air, MD (US);
Assignee:
Black & Decker Inc., Newark, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B25F 5/00 (2006.01); B23Q 5/10 (2006.01); G05B 15/02 (2006.01); B25B 23/147 (2006.01);
U.S. Cl.
CPC ...
G05B 15/02 (2013.01); B25B 23/147 (2013.01);
Abstract
An improved technique is presented for detecting when a fastener driven by a drill driver has reaches a desired stopping position. The improved techniques generally includes: sampling periodically current delivered to the electric motor; storing a sequence of current measures most recently sampled; and determining a slope for the sequence of current measures by way of linear regression. Transmission of torque to the output spindle can be interrupted based in part on the slope of the current measures.