US 5,601,483 AGranted

Power tool

AssigneeC. & E. Fein GmbH

InventorsBoris Rudolf, Walter Blutharsch, Andreas Peisert, Thomas Veit

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Abstract

A power tool, which is preferably configured as a right-angle grinder, has a motor-driven hollow spindle to drive a tool, which is fastened between a clamping flange and a counterflange by means of a quick clamping device via a tension spindle, coaxial with the hollow spindle, that is tensioned in the axial direction by means of elastic elements and is displaceable in the axial direction relative to the hollow spindle, by means of a clamping lever, between a clamped position in which the tool is nonrotatably retained between the flanges, and a released position. The clamping lever is mechanically coupled to the motor switch by means of a link rod in such a way that the clamping lever can be moved into the released position only when the motor is switched off. This rules out improper operation and any potential damage to the power tool.

Claims15

Dependent claims

Power tool, comprising a hollow spindle driven by a motor, a quick clamping device to receive a tool between a clamping flange and a counterflange, wherein the quick clamping device includes a tension spindle, coaxial with the hollow spindle, that is tensioned in an axial direction by means of elastic elements and is displaceable in the axial direction relative to the hollow spindle, by means of a clamping lever, between a clamped position in which the tool is nonrotatably retained between the flanges, and a released position in which the flanges are disengaged in the axial direction for manual changing of the tool;

and further comprising a switch movable into an activated position to actuate the motor, and a link rod arranged between said clamping lever and said switch and engaging said switch and said clamping lever so that said clamping lever is blocked against movement into said released position when said switch is in its activated position.

Dependencies are inferred from the claim text.