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US 5,480,009 AGranted
Brake system with two independent mechanical brakes
AssigneeAndreas Stihl AG & Co. KG
InventorsDieter Wieland, Herbert Armbruster, Gerhard Meyer
Life of this patent
Estimating the term…
Abstract
The device for braking an electric drive motor of a hand-held working tool has a safety brake for an immediate stopping of the working tool and an independent mechanical brake for coasting the working tool to a stop after switching off the drive motor. The mechanical brake acts on a rotational part connected to the drive motor and is activated when a switch element for activating the drive motor is released.
Claims11
A device for braking an electric drive motor of a hand-held working tool, said device comprising:
- a safety brake for an immediate stopping of the working tool;
- an independent mechanical coasting brake for coasting the working tool to a stop after switching off the drive motor;
- said mechanical coasting brake acting on a rotational part connected to the drive motor;
- said mechanical coasting brake being activated when a switch element for activating the drive motor is released;
- wherein said rotational part is a component of said safety brake and is a brake drum;
- and
- wherein said safety brake acts on one side of said brake drum and said mechanical coasting brake acts on the other side of said brake drum.
4 more elements
Dependencies are inferred from the claim text.