Cooper Industries, Inc.

Leitz Gmbh & Co. Kg

Gebr. Leitz Gmbh & Co.

Dieter Stein

Eugen Mattheiss

Karl-Heinz Kellner

A cutting tool, especially a plane blade head or plane blade shaft, includes a supporting body (,) having at least one recess (,) which is open radially to the outside, a wedge shaped clamping jaw (,) housed in the recess (,) and a blade (,) which can be fixed in its seat by means of the clamping jaw (,). For positioning the blade (,) the clamping jaw (,) is pretensioned by a compression spring (,), and for removing the blade (,) the clamping jaw (,) can be displaced radially inwards against the force of the compression spring (,), whereby the clamping jaw (,) automatically self-locks in its radial inner position. The arrangement permits the automatic self-locking of the clamping jaw (,) by providing for a spring-loaded bolt (,) which engages a recess (,) provided for in the clamping jaw (,).

Cutting tool, especially plane blade head or plane blade shaft

Profiled inserted-blade cutter

A power-operated tool is fitted with a drive, whose driving shaft can, by means of a connecting coupling whose actuation depends on the reaction torque, be coupled with a driven shaft. The connecting coupling first interrupts transfer of the torque to the driven shaft, so that, in spite of the running drive, no torque can be transferred to the driving shaft. Immediately afterwards, the drive is disconnected. As a result of this sequence of disconnections, the motor, which continues running, can no longer have any influence on the work in progress so that the fastener being tightened does not reach the point of plastic deformation.

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Oberkochen, Germany

Dieter Stein