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. 15, 2015
Filed:
Mar. 27, 2009
James Ching Sik Lau, Hong Kong, CN;
Duncan Yiu Lung Wong, Hong Kong, CN;
Chang Lin Jin, Shenzhen, CN;
Aloys J. Liu, Shenzhen, CN;
James Ching Sik Lau, Hong Kong, CN;
Duncan Yiu Lung Wong, Hong Kong, CN;
Chang Lin Jin, Shenzhen, CN;
Aloys J. Liu, Shenzhen, CN;
Johnson Electric S.A., La Chaux-de-Fonds, CH;
Abstract
A power tool has a handle and a body. The handle is provided with a battery. A motor is fixed inside a shell of the tool. An impeller is driven by the motor to create an air current to cool the motor and the battery. A plurality of air outlets are formed in the shell at a position corresponding to the impeller. An air current channel is formed inside the handle and the body and connected to the environment via holes in an enclosure of the battery. A part of the air current passes through the air current channel to cool the battery before reaching the motor.