Electrical power tool with a rotatable working tool

Details Electrical power tool with a rotatable working tool Electrical power tool with a rotatable working tool

2003-09-02

2010-12-28

Dexter, Clark F. (Department: 3724)

Cutlery

Cutting tools

Saw

C030S277400, C083S068000, C083S666000, C083S698410, C125S013010, C188S074000, C451S342000

Reexamination Certificate

active

07856724

ABSTRACT:
An electrical power tool includes a locking device (31) for securing the working tool (3) on a motor-driven shaft (2; 200), a device (10) for braking the shaft (2), a safety element (8) connected with the braking device (10) and an actuation switch (7) and having a safety position that corresponds to the braking position of the braking device (10) and a non-actuation position of the switch (7) in which the switch (7) cannot turn the shaft-driving motor (M) on, and a release position that corresponds to the release position of the braking device (10) and an actuation position of the switch (7), and a locking mechanism (21) operatively connected with the safety element (8) and the locking device (31) and displaceable between a locking position which corresponds to an unlocking position of locking device (31) and in which the safety element (8) is retained in its safety position, and a release position in which the locking device (31) is in its locking position, and the safety element (8) occupies its release position.

REFERENCES:
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patent: 6910694 (2005-06-01), Hartmann et al.
patent: 2002/0020068 (2002-02-01), Hartmann
patent: 2002/0020264 (2002-02-01), Hartmann
patent: 2002/0170408 (2002-11-01), Hartmann et al.
patent: 2005/0092149 (2005-05-01), Hartmann

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