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US 2014/0174776 A1Published application
Handheld power tool having a shiftable mechanism
AssigneeRobert Bosch GmbH
InventorsMichael-Andreas GRUNWALD, Marco PAWLOWSKI, Joerg WELKE, Dietmar SAUR
Life of this patent
Estimating the term…
Abstract
A handheld power tool with a shiftable mechanism, which is adjustable between two operating positions, has a coupling spring that is coupled with an adjustable shifting member of the mechanism. The coupling spring is embodied as a metastable spring.
Claims29
1-20. (canceled)
A handheld power tool, comprising:
- a gear comprising at least two gear stages and a shiftable mechanism which is adjustable by a user control element between a first of the gear stages and a second of the gear stages of the hand-held power tool;
- and
- a coupling spring which acts on at least one mechanical component of the shiftable mechanism and is embodied as a metastable coupling spring which in a first operating position assumes a stable position and in a second operating position assumes a quasi-stable position, wherein in the quasi-stable position the coupling spring exerts a lesser spring force than in an intermediate position between the two operating positions.
Dependencies are inferred from the claim text.