US 9,138,846 B2Granted

Battery-powered portable tools

AssigneeHusqvarna AB

InventorsJohan Svennung, Pär Martinsson, Johan Björnlinger

Life of this patent

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Abstract

A battery-powered tool includes: 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. The control circuit includes a main switch operable by a user and an auxiliary switch also operable by a user. 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 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. Operation of the auxiliary switch causes the control circuit to change between the active and inactive states.

Claims8

Dependent claims

A battery-powered portable tool, comprising:

a housing,
a driven element supported by the housing,
an electric motor coupled to the driven element to selectively drive the driven element,
a battery providing a power source for the electric motor when selectively coupled to the electric motor, and
a control circuit configured to enable selective coupling of the battery to the electric motor,
wherein the control circuit comprises at least a main switch and a first auxiliary switch, the main switch being operable to provide the selective coupling of the battery to the electric motor based at least in part on a position of the first auxiliary switch, and
wherein the first auxiliary switch is operable based on a position of a protruding member having a folded-in position and a protruding position relative to the housing, the first auxiliary switch enabling the main switch to selectively couple the battery to the electric motor responsive to the protruding member being in the folded-in position and preventing the main switch from selectively coupling of the battery to the electric motor responsive to the protruding member being in the protruding position.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/455,275Filed 8 Aug 2014 · continuation
Published: US 2015/0027742 A129 Jan 2015
Granted: 22 Sep 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

B23Q 11/0078
Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work ; Safety devices…:…
A01G 3/053
Portable: motor-driven
B23B 45/02
Hand-held or like portable drilling machines, e.g. drill guns; Equipment therefor: driven by electric power
B25F 5/00
Details or components of portable power-driven tools not particularly related to the

Family

PCT/EP2009/002588Parent of this continuation · filed 8 Apr 2009
US 2015/0027742 A1Pre-grant publication · published 29 Jan 2015
Application13/263,455Parent of this continuation
US 8,833,485 B2Parent of this continuation
US 2012/0031635 A1Published application
US 9,138,846 B2This patent

From the US filing history. Foreign family members aren’t listed.