Patents by Inventor Michael Riedel
Michael Riedel 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: 6570300Abstract: A bending transducer has a piezoelectret carried on a substrate of electrically insulating material. An electrically conductive coating, such as a foil, a grid foil, a grid mesh, or mutually parallel strips, connects the inner electrode of the piezoelectret to the substrate and forms electrical contact with the inner electrode at a number of points. The bending transducer is particularly suited for driving a drafting, weaving or knitting machine in the textile industry.Type: GrantFiled: November 23, 1998Date of Patent: May 27, 2003Assignee: Siemens AktiengesellschaftInventors: Michael Riedel, Hans-Jürgen Sestak
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Publication number: 20030076009Abstract: The invention relates to a piezoelectric bending transducer (1), comprising a support body (3), a stack (4) of piezoceramic layers (6), arranged thereon and flat electrodes (7, 8) arranged between the layers (6). On the side of the support body (3) facing the stack (4) an adaptation layer (10) is arranged with essentially the same coefficient of expansion as the piezoceramic. The bending transducer (1) displays a good actuating power and a low thermal natural distortion with economical production costs. Said transducer is particularly suitable for application in a valve.Type: ApplicationFiled: October 10, 2002Publication date: April 24, 2003Inventors: Markus Hoffman, Karl Lubitz, Michael Riedel, Michael Weinmann
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Patent number: 6548939Abstract: The piezoelectric bending transducer has a support formed of a fiber-reinforced thermosetting material and a piezoceramic layer thermobonded to at least one side of the support. The fiber material has a coefficient of thermal expansion of less than −0.5·10−6/K and the fibers extend unidirectionally and parallel to the longitudinal direction of the support. The novel bending transducer exhibits superior deflection capabilities.Type: GrantFiled: November 2, 2001Date of Patent: April 15, 2003Assignee: Siemens AktiengesellschaftInventor: Michael Riedel
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Publication number: 20030020375Abstract: A bending transducer has a piezoelectret carried on a substrate of electrically insulating material. An electrically conductive coating, such as a foil, a grid foil, a grid mesh, or mutually parallel strips, connects the inner electrode of the piezoelectret to the substrate and forms electrical contact with the inner electrode at a number of points. The bending transducer is particularly suited for driving a drafting, weaving or knitting machine in the textile industry. The bending transducer is produced by connecting a substrate of electrically insulating material with a piezoelectret having an inner electrode facing towards the substrate, and placing an electrically conductive coating between the substrate and the piezoelectret such that electrical contact is made between the conductive coating and an inner electrode of the piezoelectret at a plurality of locations.Type: ApplicationFiled: September 24, 2002Publication date: January 30, 2003Applicant: Siemens AktiengesellschaftInventors: Michael Riedel, Hans-Jurgen Sestak
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Publication number: 20020109439Abstract: A piezoelectric bending transducer having a supporting element and a piezoelectrically active layer applied to at least one side of the supporting element. In order to reduce the inherent thermal distortion, an adaptation layer with a predefined volume is applied to the piezoelectrically active layer.Type: ApplicationFiled: February 28, 2002Publication date: August 15, 2002Inventors: Horst Biesenecker, Michael Riedel
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Publication number: 20020084720Abstract: The piezoelectric bending transducer has a support formed of a fiber-reinforced thermosetting material and a piezoceramic layer thermobonded to at least one side of the support. The fiber material has a coefficient of thermal expansion of less than −0.5·10−6/K and the fibers extend unidirectionally and parallel to the longitudinal direction of the support. The novel bending transducer exhibits superior deflection capabilities.Type: ApplicationFiled: November 2, 2001Publication date: July 4, 2002Inventor: Michael Riedel
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Patent number: 6323583Abstract: A piezoelectric bending transducer comprises a flat, electrically conductive supporting body having piezoceramic coatings on both sides. Each coating has an inner contact area facing the supporting body and an outer contact area facing away from the supporting body. The piezoceramic coatings are omitted from one end of the supporting body, which is fixed in a connector base. Each of the two coatings and the supporting body are electrically connected to a plug-in contact that includes an electrically conductive elastomer in a cavity in the connecting body. The elastomer is partially elastically deformed by a contact pin inserted thereinto. As a result of the ease with which electrical connections can thus be made to the transducers, this arrangement is particulary adapted for incorporation into a transducer module with plural transducers secured adjacent to each other in a common connector base.Type: GrantFiled: October 23, 2000Date of Patent: November 27, 2001Assignee: Siemens AktiengesellschaftInventors: Jürgen Günther, Stefan Klump, Michael Riedel
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Patent number: 6316865Abstract: A piezoelectric element has a first and a second stack containing a plurality of piezoelectric ceramic layers and has an intermediate layer disposed between the first and the second stacks. The intermediate layer is formed as a supporting body made of a fiber composite material or glass. Such a multimorphous piezoelectric element exhibits a high efficiency and a high mechanical stability and, in addition, can be operated with low voltages.Type: GrantFiled: March 30, 2000Date of Patent: November 13, 2001Assignee: Siemens AktiengesellschaftInventor: Michael Riedel
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Patent number: 6255508Abstract: The present invention relates to a process for preparing a methylene-bridged biscyclopentadienyl compound having the formula I where L are, independently of one another, identical or different and are each a cyclopentadienyl group, by reacting one or two cyclopentadienyl compounds LH with formaldehyde in monomeric, oligomeric or polymeric form or formaldehyde-generating reagents in the presence of at least one base and at least one phase transfer catalyst.Type: GrantFiled: June 23, 1999Date of Patent: July 3, 2001Assignee: Targor GmbHInventors: Frank Küber, Michael Riedel, Berthold Schiemenz
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Patent number: 6218489Abstract: The present invention relates to a process to prepare an olefin using a transition metal compound of the formula I as a catalyst component where M1 is a metal of group IIIb, IVb or Vb of the Periodic Table of the Elements, R1, R2, R3 and R4 are identical or different and are each a hydrogen atom or a substituent, R5 are identical or different and are a substituent, Y are identical or different and are each a hydrogen atom, a C1-C40-hydrocarbon-containing group, an OH group, a halogen atom or an NR52 group, where R5 are identical or different and are each a halogen atom, a C1-C10-alkyl group or a C6-C10-aryl group, k is an integer which corresponds to the valence of the transition metal atom M1 minus two and if Y is a butadiene unit, k is 1, A is a bridge.Type: GrantFiled: January 28, 1999Date of Patent: April 17, 2001Assignee: Targor GmbHInventors: Michael Riedel, Gerhard Erker, Lothar Duda
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Patent number: 6187953Abstract: Guanidinium phosphanes of Formula I wherein the substituents are defined as in the specification which are useful catalyst ligands for the carbon-carbon linkage reactions of the hect reaction.Type: GrantFiled: November 17, 1999Date of Patent: February 13, 2001Assignee: Celanese GmbHInventors: Othmar Stelzer, Franz Peter Schmidtchen, Antonella Hessler, Michael Tepper, Harald Dibowski, Michael Riedel, Helmut Bahrmann
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Patent number: 6137013Abstract: A method of stabilizing aliphatic C.sub.3 -C.sub.14 -aldehydes against polymerization and autocondensation by the addition of alkaline substances to the aldehydes wherein the alkaline substances used are alkali metal hydroxides, alkaline earth metal hydroxides, alkali metal carbonates, alkaline earth metal carbonates or alkali metal carboxylates which are added to the aldehyde to be stabilized in amounts of 0.05-20 ppm, based on the aldehyde.Type: GrantFiled: December 15, 1998Date of Patent: October 24, 2000Assignee: Celanese GmbHInventors: Michael Riedel, Wolfgang Zgorzelski, Michael Messerschmidt, Klaus Bergrath
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Patent number: 6090739Abstract: The present invention relates to a transition metal compound of the formula I ##STR1## where M.sup.1 is a metal of group IIIb, IVb or Vb of the Periodic Table of the Elements,R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are identical or different and are each a hydrogen atom, a halogen atom, a C.sub.1 -C.sub.40 -hydrocarbon-containing group, an --SiR.sup.5.sub.3, --NR.sup.5.sub.2, --Si(OR.sup.5).sub.3, --Si(SR.sup.5).sub.3 or --PR.sup.5.sub.2 radical, where R.sup.5 are identical or different and are each a halogen atom, a C.sub.1 -C.sub.10 -alkyl group or a C.sub.6 -C.sub.10 -aryl group, or two or more radicals R.sup.1, R.sup.2, R.sup.3 or R.sup.4 together with the atoms connecting them form a ring system,Y are identical or different and are each a hydrogen atom, a C.sub.1 -C.sub.40 -hydrocarbon-containing group, an OH group, a halogen atom or an NR.sup.5.sub.2 group,k is an integer which corresponds to the valence of the transition metal atom M.sup.1 minus two and if Y is a butadiene unit, k is 1,A is a bridge,R.Type: GrantFiled: June 18, 1997Date of Patent: July 18, 2000Assignee: Targor GmbHInventors: Michael Riedel, Gerhard Erker, Lothar Duda
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Patent number: 6069264Abstract: The present invention relates to a transition metal compound of the formula I ##STR1## where M.sup.1 is a transition metal of group IIIb, IVb, Vb or VIb of the Periodic Table of the Elements,Y are identical or different and are each a hydrogen atom, an OH group, a halogen atom, a C.sub.1 -C.sub.40 -hydrocarbon-containing group or an NR.sup.15.sub.2 group, where R.sup.15 is a halogen atom, a C.sub.1 -C.sub.10 -alkyl group or a C.sub.6 -C.sub.10 -aryl group, k is an integer which corresponds to the valence of the transition metal atom M.sup.1 minus two and, if Y is a butadiene unit, k is 1,R.sup.1, R.sup.2, R.sup.3, R.sup.7, R.sup.8 and R.sup.9 are identical or different and are each a hydrogen atom, a halogen atom, a C.sub.1 -C.sub.40 -hydrocarbon-containing group, an --SiR.sup.15.sub.3, --NR.sup.15.sub.2, --SiOR.sup.15.sub.3, --SiSR.sup.15.sub.3 or --PR.sup.15.sub.2 radical, where R.sup.15 is a halogen atom, a C.sub.1 -C.sub.10 -alkyl group or a C.sub.6 -C.sub.Type: GrantFiled: June 12, 1997Date of Patent: May 30, 2000Assignee: Targor GmbHInventors: Michael Riedel, Gerhard Erker, Martin Konnemann
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Patent number: 6063949Abstract: The present invention relates to a stereorigid metallocene compound having as ligands at least two substituted or unsubstituted cyclopentadienyl groups which are connected to one another via a five-membered ring, where at least one cyclopentadienyl group is fused onto the five-membered ring and the ligand system of the stereorigid metallocene compound is different from 4-[.eta..sup.5 -3'-alkylcyclopentadienyl)-4,6,6-trimethyl-(.eta..sup.5 -2-alkyl-4,5-tetrahydropentalene]. The metallocene compound of the invention is suitable as a catalyst component for olefin polymerization.Type: GrantFiled: June 19, 1996Date of Patent: May 16, 2000Assignee: Targor GmbHInventors: Michael Aulbach, Frank Kuber, Michael Riedel, Freddy Helmer-Metzmann
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Patent number: 6040469Abstract: The present invention relates to a metallocene compound of the formula I, ##STR1## where Cp is an unsubstituted or substituted cyclopentadienyl group, Ind is unsubstituted or substituted indenyl, M is a tetravalent metal, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are, independently of one another, identical or different and are each a hydrogen atom or a C.sub.1 -C.sub.20 -hydrocarbon radical, R.sup.5 and R.sup.6 are, independently of one another, identical or different and are each a hydrogen atom or a C.sub.1 -C.sub.20 -hydrocarbon radical, m is 1 or 2 and k and l are 1 when m is 1 when m is 1 and k and l are zero when m is 2. The metallocene compound is suitable as a catalyst component for olefin polymerization.Type: GrantFiled: December 12, 1996Date of Patent: March 21, 2000Assignee: Targor GmbHInventors: Michael Riedel, Thomas Weller, Alexandra Jacobs, Wolfgang Anton Herrmann, Markus Morawietz
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Patent number: 6020444Abstract: The present invention relates to a process for preparing a cycloolefin copolymer by polymerization of at least one cyclic olefin and at least one acyclic olefin in the presence of a catalyst comprising at least one metallocene compound of the formula I, ##STR1## where L is a .pi.-ligand, L' is a .pi.-ligand, T is a bridge between L and L', M is a tetravalent transition metal, m is 1 or 2 and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are, independently of one another, identical or different and are each a hydrogen atom or a C.sub.1 -C.sub.20 -hydrocarbon radical.Type: GrantFiled: June 4, 1998Date of Patent: February 1, 2000Assignees: Hoechst AG, Mitsui Petrochemical Ind., Ltd.Inventors: Michael Riedel, Thomas Weller, Alexandra Jacobs
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Patent number: 5945553Abstract: Process for preparing a methylene-bridged cyclopentadienyl compoundThe present invention relates to a process for preparing a methylene-bridged biscyclopentadienyl compound having the formula I ##STR1## Where L are, independently of one another, identical or different and are each a cyclopentadienyl group, by reactin one or two cyclopentadienyl compounds LH with formaldehyde in monomeric, oligomeric or polymeric form or formaldehyde-generating reagents in the presence of at least one base and at least one phase transfer catalyst.Type: GrantFiled: September 12, 1997Date of Patent: August 31, 1999Assignee: Targor GmbHInventors: Frank Kuber, Michael Riedel, Berthold Schiemenz
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Patent number: 5869586Abstract: The present invention relates to a process for preparing a cycloolefin copolymer by polymerization of at least one cyclic olefin and at least one acyclic olefin in the presence of a catalyst comprising at least one metallocene compound of the formula I, ##STR1## where L is a .pi.-ligand, L' is a .pi.-ligand, T is a bridge between L and L', M is a tetravalent transition metal, m is 1 or 2 and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are, independently of one another, identical or different and are each a hydrogen atom or a C.sub.1 -C.sub.20 -hydrocarbon radical.Type: GrantFiled: December 13, 1996Date of Patent: February 9, 1999Assignees: Ticona GmbH, Mitsui Petrochemical Industries, Ltd.Inventors: Michael Riedel, Thomas Weller, Alexandra Jacobs
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Patent number: 5840947Abstract: The present invention relates to a metallocene compound of the formula IR.sup.5.sub.n Cp.sup.1 Cp.sup.2 M.sup.1 R.sup.1 R.sup.2 (I)where Cp.sup.1 and Cp.sup.2 are, independently of one another, identical or different and are each an unsubstituted or substituted cyclopentadienyl group, n=zero or 1, R.sup.5 is a bridge, M.sup.1 is a metal of group IVb, Vb or VIb of the Periodic Table of the Elements, R.sup.1 and R.sup.2 are identical or different and are each a hydrogen atom or a C.sub.1 -C.sub.40 -group, wherein at least one of the two groups Cp.sup.1 and Cp.sup.2 is a substituted cyclopentadienyl group which bears at least one cyclic C.sub.3 -C.sub.30 -group containing at least one heteroatom in the ring, or which bears a fused-on C.sub.2 -C.sub.30 ring system containing at least one heteroatom in the ring.The metallocene compound can be used as a catalyst component for olefin polymerization.Type: GrantFiled: May 16, 1996Date of Patent: November 24, 1998Assignee: Targor GmbHInventors: Frank Kuber, Michael Riedel, Bernd Bachmann, Andreas Winter