Hand tool driven by DC battery with multiple level battery condi

Details Hand tool driven by DC battery with multiple level battery condi Hand tool driven by DC battery with multiple level battery condi

1992-02-10

1994-03-08

Hofsass, Jeffrey

Communications: electrical

Condition responsive indicating system

Specific condition

340661, 340691, 320 48, 324433, G08B 2100

Patent

active

052931560

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.

REFERENCES:
patent: 4316134 (1982-02-01), Balan et al.
patent: 4626765 (1986-12-01), Tanaka
patent: 4876632 (1989-10-01), Osterhout et al.
patent: 5130658 (1992-07-01), Bohmer

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