US Patent No. 9,162,293

RELEASE MECHANISM FOR A ROTARY TOOL


Patent No. 9,162,293
Issue Date October 20, 2015
Title Release Mechanism For A Rotary Tool
Inventorship Andrew Meyers, Naperville, IL (US)
Assignee Robert Bosch GmbH, Stuttgart (DE)

Claim of US Patent No. 9,162,293

1. A rotary tool comprising:
a housing defining at least one slot; a motor including an output shaft supported within the housing;
a collet chuck coupled to the output shaft, the collet chuck including a main body defining a collet receiving passage configured
to slidably receive a collet, the collet chuck including at least one lever arm pivotably attached to the main body and configured
to apply a clamping force to the collet when the collet is received in the collet receiving passage;

a wedge configured to move into engagement with the at least one lever arm to generate the clamping force and to move out
of engagement with the at least one lever arm to remove the clamping force;

a bearing attached to the wedge; and
a yoke member attached to the bearing such that the yoke member and the wedge are rotatable with respect to each other, the
yoke member including at least one lever structure that projects outwardly from the yoke member through the slot, the lever
structure being movable between a first position and a second position, the wedge being moved into engagement with the at
least one lever arm when the lever structure is moved to the first position and the wedge being moved out of engagement with
the at least one lever arm when the lever structure is moved to the second position.