Power tool with clutch
AssigneesC. & E. Fein GmbH, Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
InventorsOliver Greese, Ivica Kolaric
Life of this patent
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Abstract
The invention discloses a power tool comprising a clutch having a first clutch element and a second clutch element which are seated for rotation one relative to the other and between which a torque can be transmitted. The clutch comprises an actuating element engaging at least one of the first and second clutch elements for moving the clutch between an engaged position for effecting power transmission from a drive shaft to an output shaft, and between a released position wherein there is no power transmission to said output shaft. The actuating element comprises a nanotube actuator.
Claims20
A power tool comprising:
- a motor-driven drive shaft;
- an output shaft for driving a tool receptacle;
- a clutch arranged between said drive shaft and said output shaft, said clutch having an engaged position in which torque is transmitted from said drive shaft to said output shaft, and having a released position wherein torque transmission from said drive shaft to said output shaft is interrupted;
- wherein said clutch comprises
- a first clutch element;
- a second clutch element cooperating with said first clutch element for transmitting a torque when being in said engaged position, said first and second clutch elements being seated for rotation one relative to the other;
- and
- an actuating element comprising a nanotube actuator engaging at least one of said first and second clutch elements for moving said at least one clutch element between said engaged position and said released position;
- wherein said first clutch element is connected to said output shaft for common rotation therewith, wherein said second clutch element is connected to said drive shaft for common rotation therewith, and wherein said nanotube actuator is configured for axially moving one of said first and second clutch elements from said engaged position into said released position against the action of said restoring force;
- and
- wherein said nanotube actuator, together with an electrolyte, are sealingly received in a housing, said housing comprising an opening sealed by a diaphragm, said diaphragm engaging at least one piston for translating a volume expansion of said electrolyte into an axial movement of said least one piston.
A power tool comprising:
- a motor-driven drive shaft;
- an output shaft for driving a tool receptacle;
- a clutch arranged between said drive shaft and said output shaft, said clutch having an engaged position in which torque is transmitted from said drive shaft to said output shaft, and having a released position wherein torque transmission from said drive shaft to said output shaft is interrupted;
- wherein said clutch comprises
- a first clutch element;
- a second clutch element cooperating with said first clutch element for transmitting a torque when being in said engaged position, said first and second clutch elements being seated for rotation one relative to the other;
- and
- an actuating element comprising a nanotube actuator engaging at least one of said first and second clutch elements for moving said at least one clutch element between said engaged position and said released position.
A clutch comprising:
- a first clutch element;
- a second clutch element cooperating with said first clutch element for transmitting a torque, said first and second clutch elements being seated for rotation one relative to the other;
- an actuating element engaging at least one of said first and second clutch elements for moving said at least one clutch between a first position, wherein torque is transmitted between said first and second clutch elements, and a second position, wherein torque transmission between said first and second clutch elements is interrupted;
- wherein said actuating element comprises a nanotube actuator.
Dependencies are inferred from the claim text.