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US 7,134,509 B2Granted
Portable power tool with rotating output shaft and overload protection
AssigneeAtlas Copco Tools AB
InventorErik Roland Rahm
Life of this patent
Estimating the term…
Abstract
A portable power tool is provided which includes a rotation motor (11), an output shaft (14), a gearing (13) and a drive spindle (12; 112) connecting the gearing (13) to the motor (11). A drive line arresting lock device (17; 117) is provided to facilitate loosening and/or tightening of a working implement mounting device (15), and a releasable safety clutch (23; 123) is provided between the lock device (17; 117) and the gearing (13) for protecting the gearing (13) against transmission of detrimental excessive torque magnitudes manually applied on the output shaft/mounting device (14, 15).
Claims6
A portable power tool comprising:
- a housing,
- a rotation motor,
- an output shaft with a mounting device for attachment of a working implement thereto,
- a power transmission including a drive spindle connected to the motor,
- a gearing connecting the drive spindle to the output shaft,
- a selectively activatable lock device including a latch element which is movably supported in the housing and which is engagable with at least one abutment member co-rotative with the drive spindle to arrest rotation of the drive spindle relative to the housing, and
- a torque responsive safety clutch which is located between the gearing and the abutment member, and which releases to protect the gearing from being exposed to excessive torque levels occasionally applied on the output shaft.
4 more elements
Dependencies are inferred from the claim text.