Patents by Inventor Michiel Hannes STRAATHOF
Michiel Hannes STRAATHOF 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: 11958790Abstract: The invention is directed to a co-layered propellant grain having an exposed outer surface, wherein said propellant grain comprises an outer layer comprising a slow burning propellant composition located on essentially the entire outer surface of the grain, and an inner layer comprising a fast burning propellant composition having a higher linear burn rate than said slow burning propellant composition; wherein said propellant grain has a structure such that after ignition, the inner layer becomes increasingly exposed at the outer surface.Type: GrantFiled: August 20, 2018Date of Patent: April 16, 2024Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNOInventors: Christoffel Adrianus Van Driel, Martijn Zebregs, Dinesh Ravindre Ramlal, Michiel Hannes Straathof
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Patent number: 11884604Abstract: The invention is in the field of propellants. In particular the invention is directed to a propellant for ammunition, such as medium and large caliber gun ammunition, having improved performance. In accordance with the present invention a propellant charge comprises one or more longitudinally extending, progressive-externally burning grains having a number of perforations passing through the grains in the length direction and having a cross-sectional shape (perpendicular to the grain's length direction) that is elongated.Type: GrantFiled: September 12, 2016Date of Patent: January 30, 2024Assignee: NEDERLANDSE ORGANISATIE VOOR TOEGPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNOInventors: Christoffel Adrianus van Driel, Dinesh Ravindre Ramlal, Martijn Zebregs, Michiel Hannes Straathof
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Publication number: 20220274898Abstract: The invention is directed to a radiation curable energetic composition, to a method of forming a three-dimensional energetic object, to a three-dimensional energetic object, and to uses of the radiation curable energetic composition. The radiation curable energetic composition of the invention comprises (a) one or more polymerisable components, (b) one or more polymerisation initiators, and (c) one or more energetic components.Type: ApplicationFiled: December 20, 2021Publication date: September 1, 2022Applicant: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNOInventors: Michiel Hannes STRAATHOF, Christoffel Adrianus VAN DRIEL, Aafke Tessa TEN CATE
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Patent number: 11420179Abstract: A propulsion element including a catalyzing reactor is disclosed. The catalyzing reactor comprises a reactor entrance and a reactor exit and an internal structure arranged for flowing a reacting medium through the reactor from the reactor entrance to the reactor exit. The reactor structure comprising at least one thin walled reactor channel arranged between the entrance and the exit of the reactor. The channel having a channel wall that includes a catalyst and that defines a flow path, in which channel in use, a catalyzed exothermic reaction takes place in the medium as it flows along the flow path. The at least one channel is looped to have a portion of its flow path that is downstream with respect to the reactor entrance in heat exchanging contact with a portion of a flow path that is that is more upstream with respect to the reactor entrance, so as to transfer heat between a downstream portion of the reacting medium to an upstream portion thereof.Type: GrantFiled: January 29, 2020Date of Patent: August 23, 2022Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNOInventors: Laurens Daniël Van Vliet, Michiel Hannes Straathof, Jeichienus Johannes Van Der Werff
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Publication number: 20220177387Abstract: The invention is directed to a method for the preparation of an energetic material product such as a propellant or explosive charge or grain, wherein said method comprises additive manufacturing comprising co-extrusion of at least two materials to form a multi-layered filament and layer-by-layer deposition of said multi-layered filament, wherein said multi-layered filament comprises a first material layer and a second material layer of which at least one comprises an energetic material.Type: ApplicationFiled: March 6, 2020Publication date: June 9, 2022Applicant: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNOInventors: Michiel Hannes STRAATHOF, Kjeld Jacobus Cornelis VAN BOMMEL, Christoffel Adrianus VAN DRIEL
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Patent number: 10759719Abstract: Propellant charges or grains having printed layers of two or more energetic materials are described along with methods for preparing and using them.Type: GrantFiled: March 22, 2017Date of Patent: September 1, 2020Assignee: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNOInventors: Michiel Hannes Straathof, Christoffel Adrianus Van Driel
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Publication number: 20200239380Abstract: The invention is directed to a co-layered propellant grain having an exposed outer surface, wherein said propellant grain comprises an outer layer comprising a slow burning propellant composition located on essentially the entire outer surface of the grain, and an inner layer comprising a fast burning propellant composition having a higher linear burn rate than said slow burning propellant composition; wherein said propellant grain has a structure such that after ignition, the inner layer becomes increasingly exposed at the outer surface.Type: ApplicationFiled: August 20, 2018Publication date: July 30, 2020Inventors: Christoffel Adrianus Van Driel, Martijn Zebregs, Dinesh Ravindre Ramlal, Michiel Hannes Straathof
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Publication number: 20200231517Abstract: The invention is in the field of propellants. In particular the invention is directed to a propellant for ammunition, such as medium and large caliber gun ammunition, having improved performance. In accordance with the present invention a propellant charge comprises one or more longitudinally extending, progressive-externally burning grains having a number of perforations passing through the grains in the length direction and having a cross-sectional shape (perpendicular to the grain's length direction) that is elongated.Type: ApplicationFiled: September 16, 2016Publication date: July 23, 2020Inventors: Christoffel Adrianus van Driel, Dinesh Ravindre Ramlal, Martijn Zebregs, Michiel Hannes Straathof
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Publication number: 20200164333Abstract: A propulsion element including a catalyzing reactor is disclosed. The catalyzing reactor comprises a reactor entrance and a reactor exit and an internal structure arranged for flowing a reacting medium through the reactor from the reactor entrance to the reactor exit. The reactor structure comprising at least one thin walled reactor channel arranged between the entrance and the exit of the reactor. The channel having a channel wall that includes a catalyst and that defines a flow path, in which channel in use, a catalyzed exothermic reaction takes place in the medium as it flows along the flow path. The at least one channel is looped to have a portion of its flow path that is downstream with respect to the reactor entrance in heat exchanging contact with a portion of a flow path that is that is more upstream with respect to the reactor entrance, so as to transfer heat between a downstream portion of the reacting medium to an upstream portion thereof.Type: ApplicationFiled: January 29, 2020Publication date: May 28, 2020Inventors: Laurens Daniël VAN VLIET, Michiel Hannes STRAATHOF, Jeichienus Johannes VAN DER WERFF
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Publication number: 20190100474Abstract: The invention is directed to a propellant charge, to a method of preparing a propellant charge, and to uses of the propellant charge. The propellant charge or grain of the invention comprises two or more energetic materials with different linear burn rate, wherein the two or more energetic materials are distributed within the charge or grain such that two perpendicular cross-sections of said propellant charge or grain have at least two linear burn rate gradients in non-parallel directions, wherein said propellant charge or grain is layered with layers having a layer thickness in the range of 1-10 000 ?m, wherein, if the propellant charge or grain has a longitudinal axis, at least one of said perpendicular cross-sections is along said longitudinal axis, and wherein said propellant charge or grain further comprises one or more perforations.Type: ApplicationFiled: March 22, 2017Publication date: April 4, 2019Applicant: Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNOInventors: Michiel Hannes STRAATHOF, Christoffel Adrianus VAN DRIEL
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Publication number: 20190055171Abstract: The invention is directed to a radiation curable energetic composition, to a method of forming a three-dimensional energetic object, to a three-dimensional energetic object, and to uses of the radiation curable energetic composition. The radiation curable energetic composition of the invention comprises (a) one or more polymerisable components, (b) one or more polymerisation photoinitiators, and (c) one or more energetic components.Type: ApplicationFiled: March 22, 2017Publication date: February 21, 2019Applicant: Nederlandse Organisatie voor toegepast-natuurweten schappelijk onderzoek TNOInventors: Michiel Hannes STRAATHOF, Christoffel Adrianus VAN DRIEL, Aafke Tessa TEN CATE
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Publication number: 20170246610Abstract: A catalyzing reactor comprising a reactor entrance and a reactor exit and an internal structure arranged for flowing a reacting medium through the reactor from the reactor entrance to the reactor exit. The reactor structure comprising at least one thin walled reactor channel arranged between the entrance and the exit of the reactor. The channel having a channel wall that includes a catalyst and that defines a flow path, in which channel in use, a catalyzed exothermic reaction takes place in the medium as it flows along the flow path. The at least one channel is looped to have a portion of its flow path that is downstream with respect to the reactor entrance in heat exchanging contact with a portion of a flow path that is that is more upstream with respect to the reactor entrance, so as to transfer heat between a downstream portion of the reacting medium to an upstream portion thereof.Type: ApplicationFiled: July 24, 2015Publication date: August 31, 2017Applicant: Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNOInventors: Laurens Daniël VAN VLIET, Michiel Hannes STRAATHOF, Jeichienus Johannes VAN DER WERFF