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. 16, 2014
Filed:
Apr. 08, 2009
Johan Svennung, Jönköping, SE;
Pär Martinsson, Jönköping, SE;
Johan Björnlinger, Huskvarna, SE;
Husqvarna AB, Huskvarna, SE;
Abstract
A battery-powered portable tool, such as a chainsaw, hedge trimmer or handheld drill, comprising: a housing (), a driven element () supported by the housing (), an electric motor () coupled to the driven element () so as to drive the driven element (), a battery () electrically coupled to the motor () so as to supply electric current to the motor () and a control circuit () arranged to control the supply of electric current to the motor () from the battery (), in which the control circuit () comprises a main switch () operable by a user and an auxiliary switch () also operable by a user; in which the control circuit () has: an active state in which operation of the main switch () by the user allows electric current to flow to the motor () so as to cause the driven element () to be driven; and an inactive state in which operation of the main switch () does not allow electric current to flow to the motor () and so the motor () does not drive the driven element (); in which operation of the auxiliary switch () causes the control circuit () to change between the active and inactive states; and in which the control circuit is further provided with an indicator () arranged to provide an indication to a user whether the control circuit () is in the active or inactive mode. The indication may be by the light emitting devices () or a speaker (); user-uploadable sounds may be stored in a memory () of the tool to enable a user to customise the sound of their tool.