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. 20, 2003
Filed:
Nov. 06, 2000
Yasutoshi Shimma, Anjo, JP;
Junichi Masuda, Okazaki, JP;
Shingo Umemura, Okazaki, JP;
Kazuyuki Sakakibara, Okazaki, JP;
Makita Corporation, Anjo, JP;
Abstract
A battery pack ( ) includes an air intake port ( ), air discharge ports ( ), first air passages ( ), and a second air passage ( ). Cooling air introduced into the battery pack through the air intake port ( ) flows around and through two cell groups contained in the pack before exiting to the pack from the discharge ports ( ). As the intake port and the discharge ports are both provided at an upper enclosure ( ) of the battery pack that is set on a charger ( ) for charging or an electric power tool as a power source, neither intake port nor the discharge ports are exposed to the exterior environment whether the pack is set on the charger or attached to a power tool.