Fastener driving tool having energy transfer members
AssigneeBlack & Decker Inc.
InventorsMichael Kunz, Stefan D. Gensmann, Markus Rompel
Life of this patent
Estimating the term…
Abstract
A fastener driving tool arranged to drive fasteners into a workpiece includes at least one electric motor having a central stator and an external rotor arranged to rotate around the stator. The rotor may be in the form of a flywheel. The tool includes an energy transfer member such as a driver arranged to transfer kinetic energy from the rotor to a fastener held in the tool, thereby to drive the fastener from the tool into a workpiece. The electric motor may be a brushless motor. The tool may include two such motors, arranged such that both of their rotors propel the driver simultaneously.
Claims15
A fastener driving tool arranged to drive fasteners into a workpiece, comprising:
- at least one electric motor having a central stator and an external rotor arranged to rotate around the stator, and
- an energy transfer member arranged to transfer kinetic energy from the rotor directly or indirectly to a fastener held in the tool, thereby to drive the fastener from the tool into a workpiece,
- wherein the rotor comprises a plurality of permanent magnets spaced apart from each other and located on an internal surface of the rotor facing the stator.
A fastener driving tool arranged to drive fasteners into a workpiece, comprising:
- at least one electric motor having a central stator and an external rotor arranged to rotate around the stator, and
- an energy transfer member arranged to transfer kinetic energy from the rotor directly or indirectly to a fastener held in the tool, thereby to drive the fastener from the tool into a workpiece,
- wherein the rotor comprises a flywheel, and the flywheel comprises a lip portion extending at least partially beyond the stator in a direction along an axis of rotation of the rotor about the stator.
A fastener driving tool arranged to drive fasteners into a workpiece, comprising:
- at least one electric motor having a central stator and an external rotor arranged to rotate around the stator, and
- an energy transfer member arranged to transfer kinetic energy from the rotor directly or indirectly to a fastener held in the tool, thereby to drive the fastener from the tool into a workpiece,
- wherein the rotor comprises a flywheel, the flywheel further comprising an external surface of the rotor, and having a plurality of grooves and ridges.
A fastener driving tool arranged to drive fasteners into a workpiece, comprising:
- at least one electric motor having a central stator and an external rotor arranged to rotate around the stator, and
- an energy transfer member arranged to transfer kinetic energy from the rotor directly or indirectly to a fastener held in the tool, thereby to drive the fastener from the tool into a workpiece,
- wherein the rotor comprises a flywheel, and the energy transfer member comprises a driver arranged to contact the flywheel and to be propelled by the flywheel to drive a fastener from the tool into a workpiece, and
- wherein the driver has a plurality of ridges and grooves on an external surface thereof, arranged to engage with respective grooves and ridges of the flywheel.
A fastener driving tool arranged to drive fasteners into a workpiece, comprising:
- at least one electric motor having a central stator and an external rotor arranged to rotate around the stator, and
- an energy transfer member arranged to transfer kinetic energy from the rotor directly or indirectly to a fastener held in the tool, thereby to drive the fastener from the tool into a workpiece,
- further comprising one or more sensors arranged to determine the rotational position of the rotor with respect to the stator, in use, and at least one monitoring system arranged to monitor EMF feedback from the at least one electric motor to determine the rotational position of the rotor with respect to the stator, in use.
Dependencies are inferred from the claim text.