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Kretzschmann

Holger Kretzschmann, Ruemmelsheim DE

Patent application numberDescriptionPublished
20090131689TRICYCLIC AROMATICS AND LIQUID-CRYSTALLINE MEDIUM - The invention relates to tricyclic aromatics of the general formula I05-21-2009
20110086784LUBRICANT - A lubricant containing one or more compounds selected from the keto compounds of general formula 104-14-2011

Holger Kretzschmann, Rummelsheim DE

Patent application numberDescriptionPublished
20100059711FUSED NAPHTHALENES - The invention relates to fused naphthalenes of the general formula I, in which A03-11-2010

Uwe Kretzschmann, Wangelau DE

Patent application numberDescriptionPublished
20100266357DRILLING TOOL WITH DRILL BIT - The invention relates to a drilling tool with a base, having a central axis of rotation, and a drill bit, detachably connected to the base. The drill bit has a coupling part, which can be coupled with a coupling receptacle on the face of the base and has at least two convexly curved centring portions, which are arranged such that they are distributed over the circumference and engage with an exact fit in complementary concavely curved centring portions of the coupling receptacle. The coupling part has a complementary driver stop, meshing with a rotary driver of the coupling receptacle. It is claimed as novel that the centring portions of the coupling part and/or of the coupling receptacle have clamping surfaces, which run onto each other in the manner of a rotary wedge until the driver stop and the rotary driver come up against each other counter to a predetermined direction of rotation.10-21-2010

Uwe Kretzschmann, Besigheim DE

Patent application numberDescriptionPublished
20090238649Indexable insert and use of the indexable in a solid drill - The invention relates to an indexable insert for solid drills comprising four identical cutting edges (09-24-2009
20090283975Junction Between Two Components of a Rotating Tool System - The invention relates to a junction (11-19-2009
20100183384Machine tool and cutting ring for a machine tool - The invention relates to a machine tool for use in tool machines, comprising a cutting element which is preferably configured as a cutting ring and at least two insert seats that are provided in the cutting element at distance to each other in the circumferential direction. The insert seats are fitted with at least one group of at least two identical insert tips that are detachably arranged therein and that have one working edge each, the effective working edges of the insert tips of one group being cut to the same nominal size. The insert tips are configured as indexable inserts, every single indexable insert of a group being associated with a defined insert seat in all possible positions of adjustment, and the indexable inserts of a group having at least two working edges each, one of these edges being always in the effective and at least one other edge being in the ineffective position, depending on the position of the indexable inserts in the associated insert seats. The indexable inserts of a group assume identical positions of adjustment in which defined working edges of every indexable insert of a group have the same orientation in the associated insert seat, the working edges of the indexable inserts of a group being cut to a nominal size in all common positions of adjustment.07-22-2010
20110116877ROTATING CUTTING TOOL WITH SUPPORT ELEMENT - The invention relates to a rotating cutting tool, in particular a boring tool for use in machine tools. The cutting tool comprises at least one cutting insert, designed as an indexable insert, that has an active main blade located near a corner of the insert, the outer end of said blade defining a circular flight path radius (R) as the blade rotates, said blade penetrating into a work piece at a pre-determined cutting depth (t) near a pre-formed round hole. Also provided is a secondary blade that is disposed opposite to an advancing direction and that aligns with the outermost end of the main blade, the entire length of said blade having a smaller radius than the circular flight path radius (R) of the main blade, wherein a secondary blade free surface aligns with the secondary blade opposite to the direction of rotation. A unique characteristic of the invention is that the secondary blade free surface comprises a support part disposed at a distance from the secondary blade, the peripheral radius of said part being larger than the circular flight path radius R of the active main blade by an overshoot amount (Y).05-19-2011
20110123281MACHINE TOOL WITH ADJUSTABLE CUTTING PLATE - The invention relates to a machine tool with an adjustable cutting plate. The rotating machine tool substantially comprises a base member with a rotating axis, at least one pocket formed in the base member and at least one blade support holding a cutting plate. Two side surfaces of the blade support sit against a side support surface, respectively, said blade support side surfaces making an angle between them, and the base of the blade support sits against a base support surface of the pocket, the blade support being clamped in the pocket removably by way of a clamp element. The cutting plate protrudes over the blade support with an effective blade and over the base member outward. In order to enable a fine-adjustment of tangential cutting plates in the base member, it is proposed that the base support surface form a wedge surface that includes an acute angle together with a shift axis, said wedge surface disposed at an adjusting member that can shift relative to the base member along said shift axis, the base of said blade support, in the shape of a complementary wedge, abutting against said wedge surface. Also, the two side support surfaces form guide surfaces for the blade support that are directed substantially perpendicular relative to the shift axis of the adjusting member when said blade support makes a shifting motion by way of a shifting of the adjusting member.05-26-2011

Patent applications by Uwe Kretzschmann, Besigheim DE