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公开(公告)号：US11712727B2
公开(公告)日：2023-08-01
申请号：US17055122
申请日：2019-06-17
Applicant: NORITZ CORPORATION
Inventor： Naoki Se , Shoji Okuda , Hideyuki Fujisawa
CPC classification number: B21C51/005 , B21C37/283 , B21D7/025 , B21D41/026
Abstract: A metal bend pipe having a bend portion bent in a semi-circular arc shape is provided, in which an identification part that enables one of the two end portions of the bend portion to be identified as the bending-start side or the bending-end side is provided, and the identification part is integrally formed as a protruding and/or recessed three-dimensional region. Thus, it is possible to easily and reliably identify which of the two end portions of the bend portion is the bending-start side or the bending-end side.
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公开(公告)号：US10309645B2
公开(公告)日：2019-06-04
申请号：US15624393
申请日：2017-06-15
Applicant: NORITZ CORPORATION
Inventor： Yuta Tsuji , Naoki Se , Hideyuki Fujisawa , Katsuya Imaoka , Keizo Kawano , Tatsuya Karaki , Ryosuke Umakoshi
Abstract: A cover member of a gas supply manifold has a bent rising wall portion that is formed by bending a part of the cover member so as to rise in an opposite direction of a main body. The bent rising wall portion is in a form of a loop surrounding the entire circumference of a gas supply flow path and an area around the gas supply flow path. Such configuration increases the rigidity of the cover member and prevents large distortion of the cover member and leakage of gas from the gas supply flow path. As a result, the thickness of the cover member is reduced and the weight and the production cost of the gas supply manifold are also reduced.
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公开(公告)号：US11359838B2
公开(公告)日：2022-06-14
申请号：US16578499
申请日：2019-09-23
Applicant: NORITZ CORPORATION
Inventor： Naoki Se , Shoji Okuda , Hideyuki Fujisawa , Taihei Terasawa , Masaki Kondo
Abstract: A heat exchanger includes a tube expansion portion formed by expanding a heat transfer tube so that an outer peripheral surface of the heat transfer tube is pressed against an inner peripheral surface of a hole provided in a side wall portion of a case. The tube expansion portion includes first and second bulge portions positioned respectively on the inside and the outside of the side wall portion so as to sandwich the side wall portion in an axial length direction of the heat transfer tube and configured such that respective outer peripheral surfaces thereof partially bulge outward in a radial direction of the heat transfer tube, an end portion tip end of the heat transfer tube is positioned apart from the second bulge portion, and the end portion tip end and a part in the vicinity thereof are expanded so as to be included in a part of the tube expansion portion. Thus, effects such as improving the precision with which the side wall portion of the case, the heat transfer tube, and a connecting tube are fitted to each other can be achieved, and as a result, the respective parts can be brazed easily and appropriately.
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公开(公告)号：US10533742B2
公开(公告)日：2020-01-14
申请号：US15405017
申请日：2017-01-12
Applicant: NORITZ CORPORATION
Inventor： Takashi Akiyama , Ryosuke Umakoshi , Taihei Terasawa , Kenichi Sakurai , Tatsuya Karaki , Naoki Se
Abstract: A burner case and a burner device provided with the burner case are disclosed. A cover for closing an opening of a case body of the burner case is attached to the case body by a first caulking portion and a second caulking portion. A first caulking direction and a second caulking direction intersect with each other, the first caulking direction is a direction in which a first attachment piece and a first facing portion, those constituting the first caulking portion, face each other and are caulked, the second caulking direction is a direction in which a second attachment piece and a second facing portion, those constituting the second caulking portion, face each other and are caulked. Thus, the case body and the cover are not required to be screwed or the number of the screws is reduced, and leakage of gas from the burner case to outside is prevented.
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公开(公告)号：US11779994B2
公开(公告)日：2023-10-10
申请号：US17845556
申请日：2022-06-21
Applicant: NORITZ CORPORATION
Inventor： Naoki Se , Hideyuki Fujisawa
CPC classification number: B21D53/085 , B21D39/08 , F28D1/0213 , F28D1/0477 , F28F9/182 , F28F9/26 , F24H1/41 , F28F2275/04
Abstract: A heat exchanger includes a plurality of heat transfer tubes housed in a predetermined case, a connecting tube body for connecting the plurality of heat transfer tubes, a predetermined tube expansion portion provided on each heat transfer tube, a first peripheral wall portion provided on the tube expansion portion, and a second peripheral wall portion that is positioned on an end portion of the connecting tube body and fitted to the tube expansion portion, wherein the first and second peripheral wall portions have different sectional shapes and are fitted together in a partial contact state including predetermined contact and non-contact portions. According to this configuration, the heat transfer tubes can be fixed to a side wall portion of the case and the connecting tube body can be connected to the heat transfer tubes easily and appropriately.
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公开(公告)号：US10288313B2
公开(公告)日：2019-05-14
申请号：US15380273
申请日：2016-12-15
Applicant: NORITZ CORPORATION
Inventor： Naoki Se , Michihisa Nakahara , Hideyuki Fujisawa , Kenichi Sakurai , Yuta Tsuji , Keizo Kawano , Taihei Terasawa , Masahiro Kawamoto , Masaharu Imaizumi
Abstract: A gas supply manifold has a nozzle forming member having a plurality of gas injection nozzles, a cover member configured to be overlapped on the nozzle forming member, and a caulking-fastening portion configured to fasten the nozzle forming member and the cover member. The caulking-fastening portion is configured such that a convex portion provided for one of the nozzle forming member and the cover member penetrates a hole provided for the other member, and a tip end portion of the convex portion has an engagement portion, the engagement portion having a larger diameter or a larger width than the hole and being engaged with a peripheral edge portion of the hole. A tip end face of the convex portion has a dent portion formed by pressing the tip end face into a base portion side of the convex portion and an area around the dent portion constitutes the engagement portion. Thus, the nozzle forming member and the cover member are appropriately caulked and fastened.
