US 8,790,051 B2Granted

Expandable reamer

AssigneeMapal Fabrik fur Prazisionswerkzeuge Dr. Kress KG

InventorDieter Kress

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Abstract

The present disclosure relates to an expandable reamer having a base body, a ring section, at least one cutting edge which is geometrically defined and provided on the outer surface of the ring section, an adjustment device which works on the ring section from the inside, has an adjustment screw, and serves to adjust the radial position of the at least one cutting edge, wherein the adjustment device is arranged in a cavity provided in the base body of the expandable reamer, and an adjustment body with a conical or round outer surface. The adjustment body can be displaced in the direction of the central axis of the expandable reamer and serves for the expansion of the ring section. The expandable reamer is characterized in that the adjustment body is designed as an adjustment sleeve which surrounds the adjustment screw and is mounted in a floating manner.

Claims18

Dependent claims

An expandable reamer comprising

a basic element,
an annular portion,
at least one geometrically defined cutting edge provided on an outer face of the annular portion, and
having an adjusting device, acting upon the annular portion from inside and comprising an adjusting screw, for adjusting the radial position of the at least one cutting edge, wherein
the adjusting device is disposed in a cavity provided in the basic element of the expandable reamer and has an adjusting element having a conical or spherical outer face, which adjusting element is displaceable in the direction of the center axis of the expandable reamer and serves to widen the annular portion,
wherein the adjusting element is configured as an adjusting sleeve, said adjusting sleeve having an outer wall, an inner face of which outer wall surrounds a head of the adjusting screw at a distance such that the adjusting sleeve is floatingly mounted on the adjusting screw in a manner such that the adjusting sleeve is displaceable in both an axial and a radial direction relative to the adjusting screw,
wherein
said cavity comprises an inner face;
and
the inner face comprises a spherical or conical annular region.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/664,761Filed 18 Jun 2008
Priority: DE 10 2007 028 16720 Jun 2007
Published: US 2010/0209205 A119 Aug 2010
Granted: 29 Jul 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

B23D 77/10
Reaming with means for compensating wear: by expanding a tube-like non-slotted part of the tool body
Y10T 408/85843
With resiliently urged Tool: resilient Tool or tool-support
Y10T 408/8588
Moving means including wedge, screw or cam: axially slidable moving-means
Y10T 408/85892
Axially slidable moving-means: screw driven wedge or cam