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US 8,465,348 B2Granted
Guard anti-rotation lock
AssigneeRobert Bosch GmbH
InventorsCornelius Boeck, Joachim Schadow, Sinisa Andrasic
Life of this patent
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Abstract
The invention relates to a protective hood anti-rotation lock for a portable power tool (12a-e), especially an angle grinder. Said protective hood anti-rotation lock is characterized in that it comprises an anti-rotation unit (14a-e) that is adapted to take into consideration at least one operating parameter of the portable power tool (12a-e) during anti-rotational locking.
Claims11
An assembly, comprising
- a hand-held power tool having a tool housing;
- a receiving unit for receiving a tool;
- a guard unit arranged to enclose a region of the tool;
- a guard anti-rotation lock unit connecting said guard unit to said hand-held power tool and disconnecting said guard unit from said hand-held power tool;
- and
- a switching mechanism for turning on the hand-held power tool and for turning off the hand-held power tool;
- wherein the guard anti-rotation lock unit comprises a form-fit unit which, in response to operating the switching mechanism for turning on said hand-held power tool, establishes a form-fit connection of said guard unit with said hand-held power tool to prevent a rotation of said guard unit relative to said hand-held power tool and in response to operating the switching mechanism for turning off said hand-held power tool, the form-fit unit disestablishing the form-fit connection to allow the rotation of said guard unit relative to said hand-held power tool.
4 more elements
An assembly, comprising
- a hand-held power tool having a tool housing;
- a receiving unit for receiving a tool;
- a guard unit arranged to enclose a region of the tool;
- a guard anti-rotation lock unit connecting said guard unit to said hand-held power tool and disconnecting said guard unit from said hand-held power tool;
- and
- a switching mechanism for turning on the hand-held power tool and for turning off the hand-held power tool;
- wherein the guard anti-rotation lock unit includes means for controlling guard unit rotation that is responsive to the switching mechanism and that operates to prevent a rotation of the guard unit relative to said hand-held power tool in response to turning on said hand-held power tool using the switching mechanism and that operates to allow rotation of said guard unit relative to said hand-held power tool in response to turning off said hand-held power tool using the switching mechanism.
4 more elements
Dependencies are inferred from the claim text.