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US 5,293,156 AGranted
Hand tool driven by DC battery with multiple level battery condition indicator
AssigneeNitto Kohki Co., Ltd.
InventorsMichihiro Shoji, Kenji Fukuda
Life of this patent
Estimating the term…
Abstract
A hand tool driven by a DC battery comprises a tool driving section having a motor, a DC source connected to the tool driving section, a plurality of LEDs connected to the DC source, an LED turning-off section for sequentially turning off the LEDs in accordance with the power remaining in the DC source, and an LED flickering section for causing flickering of at least one illuminated LED, when the driving section is overloaded.
Claims8
A hand tool including:
- a main body having a DC source;
- a tool section connected to the main body;
- a plurality of LEDs provided on the main body;
- a motor for driving the tool section;
- means electrically connected between the DC source and the plurality of LEDs, for turning on, in sequence, the LEDs in accordance with power remaining in the DC source;
- and
- flickering means electrically connected between the LEDs and the motor, and to the DC source, for turning on and off all of the LEDs when the motor is overloaded while in operation.
4 more elements
A hand tool including:
- a main body having a DC source;
- a tool section connected to the main body;
- a plurality of LEDs provided on the main body;
- a motor for driving the tool section;
- first drive means for activating a number of the plurality of LEDs in accordance with a first monitored condition of the tool, the first monitored condition being power remaining in the DC source and the number of LEDs activated by the first drive means being related to a degree of power remaining in the DC source;
- second drive means for flashing activation of the plurality of LEDs in accordance with a second monitored condition of the tool the second monitored condition being motor overload.
3 more elements
Dependencies are inferred from the claim text.