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. 05, 2003
Filed:
Mar. 31, 1999
Dale K. Wheeler, Fallston, MD (US);
Robert G. Moores, Jr., Reisterstown, MD (US);
Richard T. Walter, Baldwin, MD (US);
Black & Decker Inc., Newark, DE (US);
Abstract
A battery pack (FIG. ) comprises an elongated cylindrical, metal casing , a plurality of cells in casing and three coaxial pack terminals . For enhanced convenience, pack terminals are electrically connectable in a cordless device regardless of the angular orientation of the pack about casing axis . To reduce cost and increase durability, pack has no welded connections and will permit high current discharge rates. Cells are electrically connected but are mechanically disconnected. A spring engages cell and biases cells tightly together in compression to form good, low resistance electrical contact between cells , casing base cap and top . To provide a pack with two output voltages, the third pack terminal has a polarity (relative to first pack terminal ) the same as second pack terminal and is electrically connected to the cell can terminal of forward cell , thereby electrically by-passing cell