Patents by Inventor Leo Schreiber
Leo Schreiber has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9926968Abstract: For friction reduction in sliding bearing, it is known to structure the sliding surface (1) by ECM by introducing a plurality of microscopic small indentations (27). According to the invention it is proposed in particular in the same process step to smoothen also the intermediary spaces (6) between the indentations (27), thus to remove the tips of the surface profile.Type: GrantFiled: August 21, 2014Date of Patent: March 27, 2018Assignee: MAG IAS GmbHInventors: Leo Schreiber, Jürgen Reingen, Matthias Weber, Wolfgang Hafner, Emanuel Gross, Andreas Grützmacher
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Patent number: 9879726Abstract: In order to reduce friction of a crank shaft during operation by a large amount with low complexity through structuring sliding bearing surfaces (1) of the crank shaft through controlled introduction of microscopically small indentations (27) it is proposed for the center bearings and the crank bearings to only structure highly loaded portions of the bearing surface in circumferential direction and also in axial direction since this is already difficult to achieve in view of the operating gap towards the tool that only has a size of a few ?m.Type: GrantFiled: June 4, 2013Date of Patent: January 30, 2018Assignee: MAG IAS GmbHInventors: Leo Schreiber, Wolfgang Hafner, Matthias Weber, Jürgen Reingen, Hans Kuhn, Emanuel Groβ, Maarten Brussee
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Publication number: 20160273576Abstract: For friction reduction in sliding bearing, it is known to structure the sliding surface (1) by ECM by introducing a plurality of microscopic small indentations (27). According to the invention it is proposed in particular in the same process step to smoothen also the intermediary spaces (6) between the indentations (27), thus to remove the tips of the surface profile.Type: ApplicationFiled: August 21, 2014Publication date: September 22, 2016Inventors: Leo Schreiber, Jurgen Reingen, Matthias Weber, Wolfgang Hafner, Emanuel Gross, Andreas Grutzmacher
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Publication number: 20160146251Abstract: It is proposed according to the invention for structuring of straight bearing surfaces (1) with microscopically small indentations (27) in particular produced by electro chemical material removal to limit the surface portion of the indentations to 15% to 40% of the entire structured surface since this reduces manufacturing complexity whereas a larger surface portion with indentations (27) hardly generates any further reduction of friction in the straight bearing.Type: ApplicationFiled: March 20, 2014Publication date: May 26, 2016Inventors: Leo Schreiber, Jürgen Reingen, Matthias Weber, Wolfgang Hafner, Emanuel Gross, Andreas Grützmacher
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Publication number: 20160001372Abstract: Instead of receiving universal joint crosses (1) like in the prior art in a special chuck of a turning machine and machining one respective pinion (2) and subsequently cycling the work piece by 90°, a contact surface (18) with a clamping device (19) is provided in the operating area according to the invention, wherein the raw part can be placed on the clamping device and can be clamped so that two opposite faces can be machined in this first clamping step including machining centering boreholes, wherein clamping is performed thereafter between centering points (22) at the centering boreholes for machining the adjacent enveloping surfaces. After a cycling by 90° on this contact surface (18) the same steps are performed for the second pair of pinions, wherein machining the aligned pinions (2) can even he performed simultaneously if the machinery is configured accordingly.Type: ApplicationFiled: December 13, 2013Publication date: January 7, 2016Inventors: Leo Schreiber, Albrecht Hannig, Werner Mühlich
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Publication number: 20150167737Abstract: In order to reduce friction of a crank shaft during operation by a large amount with low complexity through structuring sliding bearing surfaces (1) of the crank shaft through controlled introduction of microscopically small indentations (27) it is proposed for the center bearings and the crank bearings to only structure highly loaded portions of the bearing surface in circumferential direction and also in axial direction since this is already difficult to achieve in view of the operating gap towards the tool that only has a size of a few ?m.Type: ApplicationFiled: June 4, 2013Publication date: June 18, 2015Applicant: MAG IAS GmbHInventors: Leo Schreiber, Wolfgang Hafner, Matthias Weber, Jürgen Reingen, Hans Kuhn, Emanuel Gross, Maarten Brussee
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Publication number: 20150113778Abstract: In order to shorten a process chain for material removing machining of a crank shaft after rough machining and after hardening a combination of circumferential turn milling as a first step and subsequent dry grinding as a second step is proposed according to the invention.Type: ApplicationFiled: September 18, 2012Publication date: April 30, 2015Inventors: Leo Schreiber, Matthias Weber
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Publication number: 20140223707Abstract: In order to shorten a process chain for chip removing processing of a crank shaft after coarse machining and after hardening according to the invention a combination of turn milling or single point milling is proposed as a first step and a subsequent line machining step through finishing or electro chemical etching is proposed.Type: ApplicationFiled: September 18, 2012Publication date: August 14, 2014Inventors: Leo Schreiber, Matthias Weber
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Publication number: 20140223708Abstract: In order to shorten a process chain during material removing machining of a crank shaft, after rough machining and after hardening according to the invention a combination of single point turning with subsequent tangential turning and/or finishing and/or fine dry grinding and/or electrochemical etching is proposed as a second step.Type: ApplicationFiled: September 18, 2012Publication date: August 14, 2014Applicant: MAG IAS GMBHInventors: Leo Schreiber, Matthias Weber
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Patent number: 8601917Abstract: In order to be able to measure a diameter in a turning machine without rotating a workpiece and thus prevent circularity and concentricity errors from entering into the diameter determination, it is proposed according to the invention to use a measuring device that is movable in both transversal directions relative to the rotation axis, thus in the X-direction and also in the Y-direction, wherein the measuring device can scan the workpiece from both sides in one clamping step without rotating the workpiece.Type: GrantFiled: December 9, 2009Date of Patent: December 10, 2013Assignee: MAG IAS GmbHInventor: Leo Schreiber
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Publication number: 20110283847Abstract: In order to be able to measure a diameter in a turning machine without rotating a workpiece and thus prevent circularity and concentricity errors from entering into the diameter determination, it is proposed according to the invention to use a measuring device that is movable in both transversal directions relative to the rotation axis, thus in the X-direction and also in the Y-direction, wherein the measuring device can scan the workpiece from both sides in one clamping step without rotating the workpiece.Type: ApplicationFiled: December 9, 2009Publication date: November 24, 2011Inventor: Leo Schreiber
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Patent number: 7216571Abstract: The invention relates to the cutting of rotating surfaces, especially centric symmetric surfaces (1a) of a metal workpiece (1), especially one made of steel or gray cast iron, also when said workpiece is in hardened state, by means of a geometrically determined cutter (2a) or cutters, wherein the axial extension and the material of the surface to be machined are hardly limited or not limited at all and/or the operating time during machining is reduced according to said method and/or the service life of the tool is enhanced and/or the effect of the twist-free condition is achieved, wherein at least one cutter (2a) that is skewed relative to the rotational axis (10) of the workpiece is guided during a feeding motion (3,3?) in a contacting manner on the rotating workpiece and wherein the machining parameters of the rotational axis, especially the forward feed motion in the direction of feeding and the skewed position (x) of the cutter (2a) relative to the longitudinal direction (z), are chosen in such a way thatType: GrantFiled: September 11, 2002Date of Patent: May 15, 2007Assignee: Boehringer Werkzeugmaschinen GmbHInventors: Leo Schreiber, Adrian Riegel, Matthias Kohlhase
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Patent number: 6952987Abstract: A process for cutting machining of rotating rotationally symmetrical workpieces with a defined cutting edge, wherein the resulting rotationally symmetrical surface has either no twist or a twist which is only insignificant in terms of transport effect and abrasive action and/or when machining the hardened workpiece surfaces a particularly high material removal rate can be achieved, wherein a cutting edge which is askew with respect to the axis of rotation of the workpiece is guided in contacting relationship along the rotating workpiece in a linear feed movement transversely with respect to the axis of rotation, wherein the machining parameters, in particular the broaching feed and the inclined positioning of the cutting edge are so selected that the twist occurring at the machined surface becomes a minimum in respect of twist pitch and/or twist depth and in particular the twist depth becomes a minimum.Type: GrantFiled: December 18, 2000Date of Patent: October 11, 2005Assignee: Boehringer Werkzeugmaschinen GmbHInventors: Leo Schreiber, Klaus Trott
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Publication number: 20050076754Abstract: The invention relates to the cutting of rotating surfaces, especially centric symmetric surfaces (1a) of a metal workpiece (1), especially one made of steel or gray cast iron, also when said workpiece is in hardened state, by means of a geometrically determined cutter (2a) or cutters, wherein the axial extension and the material of the surface to be machined are hardly limited or nor limited at all and/or the operating time during machining is reduced according to said method and/or the service life of the tool is enhanced and/or the effect of the twist-free condition is achieved, wherein at least one cutter (2a) that is skewed relative to the rotational axis (10) of the workpiece is guided during a feeding motion (3,3?) in a contacting manner on the rotating workpiece and wherein the machining parameters of the rotational axis, especially the forward feed motion in the direction of feeding and the skewed position (x) of the cutter (2a) relative to the longitudinal direction (z), are chosen in such a way thatType: ApplicationFiled: September 11, 2002Publication date: April 14, 2005Inventors: Leo Schreiber, Adrian Riegel, Matthias Kohlhase
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Patent number: 6732618Abstract: The invention concerns a machine tool which, in spite of the possibility of being simple and inexpensive to produce, permits a highly variable design configuration and fitment of the machine tool with machine modules and moreover in spite of good chip removal permits a simple energy supply with little susceptibility to trouble, in particular for the lower machine modules. A machine tool according to the invention comprising a bed on which are arranged guides for carrying machine modules is characterized in that the bed is a portal bed which is stood up on at least one bed foot.Type: GrantFiled: November 9, 2001Date of Patent: May 11, 2004Assignee: Boehringer Werkzeugmaschinen GmbHInventors: Leo Schreiber, Otmar Ritz, Anton Horsky
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Patent number: 6629806Abstract: A process for the metal-removing machining of a workpiece, where a disc-shaped external milling cutter is provided having cutting edges positioned on its outer circumference, the workpiece is rotated, and peripheral surfaces of the workpiece are machined with the milling cutter, by rotating the milling cutter to have a cutting speed of at least 180 m/min when roughing and at least 200 m/min when finishing, and a chip thickness of between 0.05-0.5 mm.Type: GrantFiled: December 22, 1998Date of Patent: October 7, 2003Assignee: Boehringer Werkzeugmaschinen GmbHInventors: Rolf Santorius, Paul Dieter Scharpf, Wolf-Dietrich Voss, Matthias Kohlhase, Herbert Kiefer, Leo Schreiber
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Publication number: 20030089204Abstract: A process for cutting machining of rotating rotationally symmetrical workpieces with a defined cutting edge, wherein the resulting rotationally symmetrical surface has either no twist or a twist which is only insignificant in terms of transport effect and abrasive action and/or when machining the hardened workpiece surfaces a particularly high material removal rate can be achieved, wherein a cutting edge which is askew with respect to the axis of rotation of the workpiece is guided in contacting relationship along the rotating workpiece in a linear feed movement transversely with respect to the axis of rotation, wherein the machining parameters, in particular the broaching feed and the inclined positioning of the cutting edge are so selected that the twist occurring at the machined surface becomes a minimum in respect of twist pitch and/or twist depth and in particular the twist depth becomes a minimum.Type: ApplicationFiled: June 14, 2002Publication date: May 15, 2003Inventors: Leo Schreiber, Klaus Trott
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Patent number: 6322300Abstract: The problem addressed by the invention is to provide a milling machine which can be used to machine eccentric end faces and peripheral faces and which ensures a short machining time despite its simple design. A milling machine of this king for machining workpieces and with means of clamping eccentric end faces or enveloping surfaces, e.g.Type: GrantFiled: July 12, 1999Date of Patent: November 27, 2001Assignee: Boehringer Werkzeugmaschinen GmbHInventors: Rolf Santorius, Paul Dieter Scharpf, Wolf-Dietrich Voss, Matthias Kohlhase, Herbert Kiefer, Leo Schreiber
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Patent number: 6283687Abstract: The invention relates to a process and a device for machining of workpieces (10) like crankshafts or similar components which are rotated about their own axis during machining, at least two mutually independently operating rotary milling tools (15, 16, 21, 22) performing material-removing operations simultaneously at different points on a workpiece. In order to maximize the edge life of the tools used, with special regard to the most uniform wear possible on all the rotary milling tools, it is proposed that the rotation speed of the tools be matched or varied to provide an optimum cutting operation and the rotation speed of the second and any other rotary milling tool be controlled dependently upon the tool rotation speed predetermined by the matching or variation.Type: GrantFiled: August 2, 1999Date of Patent: September 4, 2001Assignee: Boehringer Werkzeugmaschinen GmbHInventors: Rolf Santorius, Paul Dieter Scharpf, Wolf-Dietrich Voss, Matthias Kohlhase, Herbert Kiefer, Leo Schreiber