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. 28, 2010
Filed:
Jul. 06, 2006
Applicants:
David C. Shafer, Menlo Park, CA (US);
Jean-pierre Krauer, San Jose, CA (US);
Inventors:
David C. Shafer, Menlo Park, CA (US);
Jean-Pierre Krauer, San Jose, CA (US);
Assignee:
Power Tool Institute, Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 11/00 (2006.01); B26D 1/00 (2006.01); G06F 19/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A capacitive sensing system for use with a power cutting tool of the type which has an exposed, moveable blade adjacent a work surface is disclosed. The sensing system drives an excitation voltage onto the exposed blade and monitors the current drawn from the blade, detects changes in the amplitude and phase and analyzes the characteristics of the changes to selectively trigger a reaction system.