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:
May. 31, 2016
Filed:
Oct. 18, 2012
Black & Decker Inc., Newark, DE (US);
Sankarshan Murthy, Mountain View, CA (US);
John Howson, Sparks, MD (US);
Tal Gottesman, Towson, MD (US);
Scott J. Eshleman, Parkville, MD (US);
Russell David Hester, Odenton, MD (US);
Craig Alan Schell, Maryland, MD (US);
Daniel Puzio, Baltimore, MD (US);
Daniel L. Schwartz, Timonium, MD (US);
Black & Decker Inc., New Britain, CT (US);
Abstract
A power tool includes a housing, a motor disposed in the housing, a transmission disposed in the housing and coupled to the motor, an output end effector coupled to the transmission, a control circuit for controlling power delivery from a power source to the motor, and a force sensing electronic clutch including a force sensor coupled to a substantially stationary element of the transmission. The force sensor senses a reaction torque transmitted from the end effector to at least a portion of the transmission. The sensor is configured to generate a first electronic signal corresponding to an amount of the reaction torque. The control circuit compares the first electronic signal with a second electronic signal corresponding to a desired threshold torque value, and initiates a protective operation when a value of the first electronic signal indicates that the reaction torque has exceeded the desired threshold torque value.