Patents by Inventor Peter Mraz
Peter Mraz 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: 9518358Abstract: A discharge assembly including: a chamber having an sidewall extending around a perimeter of the chamber, an open upper region, an flange coupling at an upper region of the sidewall and extending around the upper region and a bottom, wherein the chamber receives a rotating impeller; a plurality of discharge openings in at least one of the sidewall and bottom of the chamber; a plurality of valves each coupled to one of the discharge openings, and a plurality of nozzles each coupled to one of the discharge openings and downstream in the opening to the valve for the opening.Type: GrantFiled: February 17, 2011Date of Patent: December 13, 2016Assignee: Andritz Inc.Inventors: Thomas Pschorn, Bertil Stromberg, Peter Mraz
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Patent number: 9422518Abstract: A reactor apparatus including: an internal mixing chamber including a first chamber section having a cross-sectional area expanding from a biomass inlet to the internal mixing chamber to the a second chamber section; the second chamber section having a substantially uniform internal cross-sectional area from the opposite end of the first chamber section to a discharge end of the mixing chamber; the biomass inlet is coupled to a source of pre-treated biomass external to the reactor vessel, and a rotating mixing device in the internal mixing chamber and coaxial with an axis of the first chamber section.Type: GrantFiled: October 14, 2011Date of Patent: August 23, 2016Assignee: Andritz Inc.Inventors: Bertil Stromberg, John F. Bolles, Thomas Pschorn, Peter Mraz
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Patent number: 8715419Abstract: A method to process cellulosic material in a treatment vessel including: introducing the cellulosic material to a processing chamber of the vessel; adding heat energy or pressure to the vessel to hydrolyze the cellulosic material in the processing chamber and dissolve hemi-cellulosic from the cellulosic material; compressing the cellulosic material in the processing chamber; extracting the dissolved hemi-cellulosic material through a screen from the processing section; draining the extracted hemi-cellulosic material from the vessel; and discharging the cellulosic material from the vessel separately from the extracted hemi-cellulosic material.Type: GrantFiled: January 14, 2013Date of Patent: May 6, 2014Assignee: Andritz Inc.Inventors: Peter Mraz, Thomas Pschorn, Bertil Stromberg, Namhee Shin
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Publication number: 20130224852Abstract: A reactor apparatus including: an internal mixing chamber including a first chamber section having a cross-sectional area expanding from a biomass inlet to the internal mixing chamber to the a second chamber section; the second chamber section having a substantially uniform internal cross-sectional area from the opposite end of the first chamber section to a discharge end of the mixing chamber; the biomass inlet is coupled to a source of pre-treated biomass external to the reactor vessel, and a rotating mixing device in the internal mixing chamber and coaxial with an axis of the first chamber section.Type: ApplicationFiled: October 14, 2011Publication date: August 29, 2013Applicant: Andritz Technology and Asset Management GmbHInventors: Bertil Stromberg, John F. Bolles, Thomas Pschorn, Peter Mraz
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Patent number: 8353989Abstract: A biomass cooking device including: a treatment vessel having an biomass inlet adapted to receive biomass material to a processing chamber of the vessel, a biomass outlet adapted to discharge from the processing chamber the biomass material processed in the vessel, an extraction region of the vessel and a liquids outlet to the extraction region to discharge dissolved hemi-cellulosic material extracted from the biomass material in the processing chamber; a piston press in the cooking vessel defining a moveable wall of the processing chamber, wherein the piston press moves to reduce the processing chamber and thereby compress the biomass material; and a screen plate in the vessel forming a barrier between the processing chamber and an extraction region of the vessel, the screen plate having apertures to pass the dissolved hemi-cellulosic material through the screen plate from the processing chamber to the extraction region.Type: GrantFiled: July 15, 2009Date of Patent: January 15, 2013Assignee: Andritz Inc.Inventors: Peter Mraz, Thomas Pschorn, Bertil Stromberg, NamHee Shin
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Publication number: 20120211512Abstract: A discharge assembly including: a chamber having an sidewall extending around a perimeter of the chamber, an open upper region, an flange coupling at an upper region of the sidewall and extending around the upper region and a bottom, wherein the chamber receives a rotating impeller; a plurality of discharge openings in at least one of the sidewall and bottom of the chamber; a plurality of valves each coupled to one of the discharge openings, and a plurality of nozzles each coupled to one of the discharge openings and downstream in the opening to the valve for the opening.Type: ApplicationFiled: February 17, 2011Publication date: August 23, 2012Applicant: ANDRITZ INC.Inventors: Thomas Pschorn, Bertil Stromberg, Peter Mraz
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Publication number: 20100317053Abstract: Methods for mixing a pretreated cellulosic biomass feedstock using a centrifugal mixer prior to reactions in a bioreactor.Type: ApplicationFiled: June 8, 2010Publication date: December 16, 2010Applicant: ANDRITZ INC.Inventors: Bertil STROMBERG, Thomas PSCHORN, Peter MRAZ, Serge GENDREAU
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Publication number: 20100116267Abstract: A biomass cooking device including: a treatment vessel having an biomass inlet adapted to receive biomass material to a processing chamber of the vessel, a biomass outlet adapted to discharge from the processing chamber the biomass material processed in the vessel, an extraction region of the vessel and a liquids outlet to the extraction region to discharge dissolved hemi-cellulosic material extracted from the biomass material in the processing chamber; a piston press in the cooking vessel defining a moveable wall of the processing chamber, wherein the piston press moves to reduce the processing chamber and thereby compress the biomass material; and a screen plate in the vessel forming a barrier between the processing chamber and an extraction region of the vessel, the screen plate having apertures to pass the dissolved hemi-cellulosic material through the screen plate from the processing chamber to the extraction region.Type: ApplicationFiled: July 15, 2009Publication date: May 13, 2010Applicant: ANDRITZ INC.Inventors: Peter Mraz, Thomas Pschorn, Bertil Stromberg, Namhee Shin
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Publication number: 20080277082Abstract: A steam explosion pulping method including: impregnating a cellulosic biomass feed material in a pressurized reactor vessel; discharging the impregnated feed material from the vessel to a high pressure compressor; elevating a pressure of the feed material in the compressor; discharging the pressurized feed material from the compressor to a conduit coupled to a blow valve; rapidly reducing pressure of the pressurized feed material as the feed material passes through the blow valve, and pulping the feed material by expansion of fluid in the feed material during the rapid pressure reduction.Type: ApplicationFiled: March 28, 2008Publication date: November 13, 2008Applicant: ANDRITZ INC.Inventors: Thomas Pschorn, Marc Sabourin, Peter Mraz
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Patent number: 6145766Abstract: The invention relates to a device for dewatering and defibrating ligno-cellulose material using a screw. It is primarily characterized by a defibrating element (9) directly adjoining the body (2') of a first screw.Type: GrantFiled: February 12, 1998Date of Patent: November 14, 2000Assignee: Andritz-Patentverwaltungs-Gesellschaft m.b.H.Inventors: Peter Mraz, Heinrich Munster
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Patent number: 5566611Abstract: The invention relates to an apparatus for separating liquid from solids-liquid mixtures, in particular fibrous matter suspensions, more particularly under pressure, comprising a solid retention component having liquid passages, composed of a screen and a supporting body for the screen. The invention is primarily characterized in that the solids retention component is designed in multiple layers, that layer which faces the solids-liquid mixture taking the form of a screen (3) with apertures (7) and that layer which faces away from the solids-liquid mixture being designed as a support body (4) having slot-shaped apertures (5). The invention furthermore relates to an apparatus according to the present invention in the form of a worm press.Type: GrantFiled: March 20, 1995Date of Patent: October 22, 1996Assignee: Andritz- Patentverwaltungs-Gesellschaft m.b.HInventors: Peter Scheucher, Gerhard Heindler, Walter Schinninger, Gerhard Paier, Peter Mraz
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Patent number: 5515776Abstract: The present invention relates to a worm press for separating liquids from solids-liquid mixtures, in particular fibrous suspensions, more particularly under pressure, including a worm rotating inside a jacket comprising liquid passages. The worm press according to the invention is primarily characterized in that the shaft (13) of the worm (14) which is preferably of hollow construction, comprises in the axial conveying direction following onto the region which comprises at least one worm rib (14'), a smooth terminal region (13') in which the worm shaft (13) is designed as a jacket shaft, provided with a cavity (13") between a jacket (22) and a preferably hollow core (17), and that this jacket (22) comprises liquid passages, for example bores (3"), leading into the aforementioned cavity (13"), this cavity (13") being in communication with at least one liquid drainage outlet (18).Type: GrantFiled: January 4, 1995Date of Patent: May 14, 1996Assignee: Andritz-Patentverwaltungs-Gesellschaft m.b.H.Inventors: Peter Scheucher, Gerhard Heindler, Walter Schinninger, Gerhard Paier, Peter Mraz