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US 4,576,528 AGranted
Rotary tool holder
OwnerPhillip A. Sollamiinventor
Life of this patent
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Abstract
A rotary tool holder for use with an automatic or semi-automatic tool grinding machine is disclosed. The tool holder includes a rotating collet and spindle. The spindle is driven through a torque limiting coupling for protection against lock up. A shaft is connected to the spindle through the torque limiting coupling which includes a disc spring made up of a plurality of concave-convex shaped discs in frictional engagement with the shaft and the spindle. The disc spring will slip at a given torque during lock up. A fluid responsive collet actuator is provided for automatic opening and closing of the collet.
Claims13
A rotary tool holder comprising:
- a housing;
- a substantially cylindrical spindle mounted for rotation within said housing;
- a collet within said spindle moveable between an open and a closed position for holding the tool;
- a shaft connected to said collet for moving said collet between the open and closed positions and for rotating said collet;
- means for rotating said shaft;
- means for longitudinally moving said shaft into said open and closed positions;
- and
- means for transferring torque from said rotating shaft to said spindle for rotating said spindle, said means for transferring torque including means for limiting said torque transmitted to a predetermined maximum level providing for protection of the holder from an overload force on said spindle.
5 more elements
Dependencies are inferred from the claim text.