IP Library Granted Patent US 7,828,073
Granted Patent B2
US 7,828,073 · App. 12/215,631 · Granted Nov 9, 2010

Vibrating hand-held power tool with a locking switch for a motor switch

Assignee: Hilti Aktiengesellschaft
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Quick Facts
Patent No.
US 7,828,073
App. No.
12/215,631
Granted
Nov 9, 2010
Kind
B2
Abstract

A rotary-percussion hand-held power tool includes a vibrating percussion mechanism ( 2 ) for applying blows along a percussion axis (A), a guiding handle ( 4 ) vibrationally decoupled from the percussion mechanism ( 2 ) and provided with a motor switch ( 5 ) displaceable in switching region (X) for blocking the motor switch ( 5 ), an operational mode selection switch ( 3 ) arranged in the percussion mechanism ( 2 ), and a switching bar ( 9 ) displaceable by the operational mode selection switch ( 3 ) and having a stop ( 10 ) that projects into the switching region (X) of the locking switch ( 7 ) in the drilling operational mode.

Claims (4)

1. A rotary-percussion hand-held power tool, comprising a vibrating percussion mechanism ( 2 ) for applying blows along a percussion axis (A); a guiding handle ( 4 ) vibrationally decoupled from the percussion mechanism ( 2 ); a motor switch ( 5 ) provided on the guiding handle ( 4 ) for controlling a power tool motor; a locking switch ( 7 ) associated with the motor switch ( 5 ) and displaceable in switching region (X) for blocking same; an operational mode selection switch ( 3 ) arranged in the percussion mechanism ( 2 ) for switching an operation of the percussion mechanism ( 2 ) between a drilling operational mode and a chisel operational mode; a switching bar ( 9 ) displaceable by the operational mode selection switch ( 3 ) and having a stop ( 10 ) that projects into the switching region (X) of the locking switch ( 7 ) upon switching of the mode selection switch ( 3 ) to the drilling operational mode to prevent the locking switch ( 7 ) from blocking the motor switch ( 5 ) in the drilling operational mode; and means for blocking the motor switch ( 5 ) in a switch-on position thereof and actuatable by the locking switch ( 7 ) in the chisel operational mode, the blocking means comprising a flexible elastic leaf spring ( 12 ) deformable by the locking switch ( 7 ) upon displacement thereof and having one end fixedly secured and forming, at another end thereof, a hook ( 13 ) formlockingly engageable in an associated recess ( 14 ) provided on the motor switch ( 5 ).

2. A hand-held power tool according to claim 1 , wherein the leaf spring ( 12 ) is located in an upper handle stirrup ( 6 ).

3. A hand-held power tool according to claim 1 , wherein the locking switch ( 7 ) is formed as a slide manually displaceable in an axial direction.

4. A hand-held power tool according to claim 3 , wherein the leaf spring ( 12 ) forms, within an axial extension thereof, a nose ( 11 ) oriented toward the locking switch-forming slide and over which the axially displaceable slide at least partially slides.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 27, 2008
From: LIEBERT, BERNHARD; PALLMER, PIERRE
To: HILTI AKTIENGESELLSCHAFT
Reel/Frame 021224/0965 →
Priority Claims (1)
DE 10 2007 000 362 · Jul 2, 2007 · national
Continuity (1)
Related Publication 20090008111A1 · Jan 8, 2009