Patents by Inventor Hitoshi Niinuma
Hitoshi Niinuma 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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Publication number: 20230249117Abstract: Provided are a filter pack capable of suitably maintaining a space between pleats while suppressing an increase in pressure loss, and an air filter provided with the same. The filter pack includes a filter medium that collects fine particles in a gas and has multiple pairs of ventilation surfaces which are continuous and face each other through alternating folds due to pleating, and a space holding member that holds a space between each of the pairs of ventilation surfaces, and that is formed extending in a direction orthogonal to the fold on at least one of the pair of ventilation surfaces and has a base material layer and at least one space forming layer formed on the base material layer.Type: ApplicationFiled: July 8, 2021Publication date: August 10, 2023Applicant: NIPPON MUKI CO., LTD.Inventors: Kazuya SEKI, Shiro HAYASHI, Hitoshi NIINUMA
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Publication number: 20220260290Abstract: A refrigeration apparatus includes a refrigerant circuit having a heat exchanger, a housing that houses at least the heat exchanger and is provided with a suction port on an upstream side of the heat exchanger, and a filter attached to the suction port of the housing. The filter is configured to be held not to come into contact with the heat exchanger. When air containing oil mist flows to the heat exchanger via the filter, at least a part of an oil component in the air containing oil mist is trapped by the filter.Type: ApplicationFiled: May 19, 2020Publication date: August 18, 2022Inventors: Takuya MIMURA, Junpei YAMAMOTO, Hitoshi NIINUMA
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Publication number: 20220054969Abstract: An air filter medium includes a glass filter medium layer that includes a glass fiber. The glass filter medium layer has a protruding portion. The protruding portion undergoes a change in protrusion height of 70% or less when left to stand at an atmospheric temperature of 100° C. for one hour.Type: ApplicationFiled: September 27, 2019Publication date: February 24, 2022Inventors: Toshihiro KANDA, Takashi KIMURA, Chizuru MURAKAMI, Takayuki HYOUDOU, Hitoshi NIINUMA
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Patent number: 10265661Abstract: A mixed powder and a material for molding have polytetrafluoroethylene as a main component. Each includes polytetrafluoroethylene that can be fibrillated, a non-hot melt processable component that is not fibrillated, and a hot melt processable component with a melting point of lower than 320° C. that is not fibrillated. The non-hot melt processable component that is not fibrillated is contained in a range of 20 to 40% by weight of the total weight. The hot melt processable component is contained at equal to or more than 0.1% by weight but less than 20% by weight of the total weight. A drawn porous body includes a plurality of fibrils, and a plurality of knotted portions that are connected to each other by the fibrils.Type: GrantFiled: June 2, 2017Date of Patent: April 23, 2019Assignee: Daikin Industries, Ltd.Inventors: Shinichi Chaen, Hideyuki Kiyotani, Kunihiko Inui, Taku Yamanaka, Li Bao, Yoshiyuki Shibuya, Seigo Yamamoto, Makoto Kobayashi, Shunji Kasai, Hitoshi Niinuma
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Patent number: 10265654Abstract: A filtering medium includes first and second porous membranes mainly composed of fluororesin, and a plurality of air permeable supports to support the first and second membranes. The second membrane is disposed downstream of the first membrane. When air containing polyalphaolefin particles with a count median diameter of 0.25 ?m is continuously passed through at a flow rate of 5.3 cm/sec and pressure loss is increased by 250 Pa, the first membrane has a dust retention amount larger than the second membrane. The filtering medium has a pressure loss of less than 200 Pa when air is passed through at a flow rate of 5.3 cm/sec. A collecting efficiency of NaCl particles with a particle diameter of 0.3 ?m is 99.97% or more when air containing the NaCl particles is passed through at a flow rate of 5.3 cm/sec. The dust retention amount is 25 g/m2 or more.Type: GrantFiled: March 20, 2015Date of Patent: April 23, 2019Assignee: Daikin Industries, Ltd.Inventors: Yoshiyuki Shibuya, Hideyuki Kiyotani, Kunihiko Inui, Li Bao, Shinichi Chaen, Seigo Yamamoto, Makoto Kobayashi, Hitoshi Niinuma
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Patent number: 10245545Abstract: An embossed air filter filtration medium has at least one porous film and a plurality of air-permeable support materials supporting the at least one porous film. The least one porous film includes a fibril-formable polytetrafluoroethylene, a non-fibril-forming and non-hot-melt-processable component, and a non-fibril-forming and hot-melt-processable component having a melting point below 320° C. Surfaces of both sides of the air filter filtration medium are formed by two air-permeable support materials of the air-permeable support materials. The air filter filtration medium has a plurality of embossed projections. The embossed air filter filtration medium may be part of a filter pack, which may be part of an air filter unit. The embossed air filter filtration medium is manufactured by laminating air-permeable support materials on the at least one porous film and embossing the air filter filtration medium to form the projections.Type: GrantFiled: October 22, 2014Date of Patent: April 2, 2019Assignee: Daikin Industries, Ltd.Inventors: Satoshi Hara, Kunihiko Inui, Li Bao, Makoto Kobayashi, Hitoshi Niinuma
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Publication number: 20180065094Abstract: A mixed powder and a material for molding have polytetrafluoroethylene as a main component. Each includes polytetrafluoroethylene that can be fibrillated, a non-hot melt processable component that is not fibrillated, and a hot melt processable component with a melting point of lower than 320° C. that is not fibrillated. The non-hot melt processable component that is not fibrillated is contained in a range of 20 to 40% by weight of the total weight. The hot melt processable component is contained at equal to or more than 0.1% by weight but less than 20% by weight of the total weight. A drawn porous body includes a plurality of fibrils, and a plurality of knotted portions that are connected to each other by the fibrils.Type: ApplicationFiled: June 2, 2017Publication date: March 8, 2018Inventors: Shinichi CHAEN, Hideyuki KIYOTANI, Kunihiko INUI, Taku YAMANAKA, Li BAO, Yoshiyuki SHIBUYA, Seigo YAMAMOTO, Makoto KOBAYASHI, Shunji KASAI, Hitoshi NIINUMA
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Patent number: 9707504Abstract: A composition, a mixed powder and a material for molding have polytetrafluoroethylene as a main component. Each includes polytetrafluoroethylene that can be fibrillated, a non-hot melt processable component that is not fibrillated, and a hot melt processable component with a melting point of lower than 320° C. that is not fibrillated. The hot melt processable component is contained at equal to or more than 0.1% by weight but less than 20% by weight of a total weight. A filtering medium for an air filter includes a porous membrane made of these components, and an air permeable support. The porous membrane is manufactured, by mixing these components, extruding the mixture, rolling and drawing.Type: GrantFiled: April 19, 2013Date of Patent: July 18, 2017Assignee: Daikin Industries, Ltd.Inventors: Shinichi Chaen, Hideyuki Kiyotani, Kunihiko Inui, Taku Yamanaka, Li Bao, Yoshiyuki Shibuya, Seigo Yamamoto, Makoto Kobayashi, Shunji Kasai, Hitoshi Niinuma
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Publication number: 20170128876Abstract: A filtering medium includes first and second porous membranes mainly composed of fluororesin, and a plurality of air permeable supports to support the first and second membranes. The second membrane is disposed downstream of the first membrane. When air containing polyalphaolefin particles with a count median diameter of 0.25 ?m is continuously passed through at a flow rate of 5.3 cm/sec and pressure loss is increased by 250 Pa, the first membrane has a dust retention amount larger than the second membrane. The filtering medium has a pressure loss of less than 200 Pa when air is passed through at a flow rate of 5.3 cm/sec. A collecting efficiency of NaCl particles with a particle diameter of 0.3 ?m is 99.97% or more when air containing the NaCl particles is passed through at a flow rate of 5.3 cm/sec. The dust retention amount is 25 g/m2 or more.Type: ApplicationFiled: March 20, 2015Publication date: May 11, 2017Applicant: Daikin Industries, Ltd.Inventors: Yoshiyuki SHIBUYA, Hideyuki KIYOTANI, Kunihiko INUI, Li BAO, Shinichi CHAEN, Seigo YAMAMOTO, Makoto KOBAYASHI, Hitoshi NIINUMA
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Publication number: 20160236132Abstract: An embossed air filter filtration medium has at least one porous film and a plurality of air-permeable support materials supporting the at least one porous film. The least one porous film includes a fibril-formable polytetrafluoroethylene, a non-fibril-forming and non-hot-melt-processable component, and a non-fibril-forming and hot-melt-processable component having a melting point below 320° C. Surfaces of both sides of the air filter filtration medium are formed by two air-permeable support materials of the air-permeable support materials. The air filter filtration medium has a plurality of embossed projections. The embossed air filter filtration medium may be part of a filter pack, which may be part of an air filter unit. The embossed air filter filtration medium is manufactured by laminating air-permeable support materials on the at least one porous film and embossing the air filter filtration medium to form the projections.Type: ApplicationFiled: October 22, 2014Publication date: August 18, 2016Inventors: Satoshi HARA, Kunihiko INUI, Li BAO, Makoto KOBAYASHI, Hitoshi NIINUMA
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Patent number: 9242201Abstract: A filter medium for an air filter collecting dust in an air flow has a principal collection layer including a porous polytetrafluoroethylene film. A surface of the filter medium is provided with a plurality of embossed projections. Preferably, a processed filter medium maintains a zigzag shape by pleating an unprocessed filter medium to create mountain folds and valley folds. Preferably, an air filter unit includes such a processed filter medium and a frame body holding the processed filter medium.Type: GrantFiled: August 30, 2012Date of Patent: January 26, 2016Assignee: Daikin Industries, Ltd.Inventors: Li Bao, Makoto Kobayashi, Jun Morita, Tatsumi Sakano, Osamu Kitayama, Satoshi Hara, Hitoshi Niinuma
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Publication number: 20150082757Abstract: A composition, a mixed power and a material for molding have polytetrafluoroethylene as a main component. Each includes polytetrafluoroethylene that can be fibrillated, a non-hot melt processable component that is not fibrillated, and a hot melt processable component with a melting point of lower than 320° C. that is not fibrillated. The hot melt processable component is contained at equal to or more than 0.1% by weight but less than 20% by weight of a total weight. A filtering medium for an air filter includes a porous membrane made of these components, and an air permeable support. The porous membrane is manufactured, by mixing these components, extruding the mixture, rolling and drawing.Type: ApplicationFiled: April 19, 2013Publication date: March 26, 2015Inventors: Shinichi Chaen, Hideyuki Kiyotani, Kunihiko Inui, Taku Yamanaka, Li Bao, Yoshiyuki Shibuya, Seigo Yamamoto, Makoto Kobayashi, Shunji Kasai, Hitoshi Niinuma
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Publication number: 20140223872Abstract: A filter medium for an air filter collecting dust in an air flow has a principal collection layer including a porous polytetrafluoroethylene film. A surface of the filter medium is provided with a plurality of embossed projections. Preferably, a processed filter medium maintains a zigzag shape by pleating an unprocessed filter medium to create mountain folds and valley folds. Preferably, an air filter unit includes such a processed filter medium and a frame body holding the processed filter medium.Type: ApplicationFiled: August 30, 2012Publication date: August 14, 2014Inventors: Li Bao, Makoto Kobayashi, Jun Morita, Tatsumi Sakano, Osamu Kitayama, Satoshi Hara, Hitoshi Niinuma
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FILTER MEDIUM FOR AIR FILTER, AIR FILTER UNIT, AND METHOD FOR PRODUCING FILTER MEDIUM FOR AIR FILTER
Publication number: 20140165517Abstract: A filter medium for an air filter unit for collecting dust from an airflow includes a pre-collection layer, a principal collection layer and an air-permeable cover layer. The pre-collection layer collects a part of the dust in the air flow. The principal collection layer includes a porous polytetrafluoroethylene film. The principal collection layer is positioned on a downstream side of the air flow relative to the pre-collection layer to collect dust that passes through the pre-collection layer. The air-permeable cover layer is positioned as an outermost surface layer of the filter medium on an upstream side of the air flow to allow dust in the air flow to pass through. The air-permeable cover layer is configured to suppress deformation of a surface of the filter medium caused by pressing force from an outside. Preferably, an air filter unit includes the filter medium in a zigzag shape.Type: ApplicationFiled: August 30, 2012Publication date: June 19, 2014Applicant: Daikin Industries, Ltd.Inventors: Satoshi Hara, Li Bao, Kunihiko Inui, Seigo Yamamoto, Yoshiyuki Shibuya, Makoto Kobayashi, Hitoshi Niinuma -
Patent number: 8597393Abstract: The invention provides a filter pack of which the mass is not increased, and moreover, the effective filter medium area is not reduced, and of which the pressure drop is sufficiently low, and the strength is sufficiently high, and an air filter using this. A pleated air filter pack is configured in such a way that dot embossed projections are provided on front and rear surfaces of a filter medium made of a non-woven fabric, the filter medium is folded in zigzag shape along creases of pleats, and the opposing embossed projections are brought into contact with each other when the filter medium is folded, thus maintaining the intervals between the filter media.Type: GrantFiled: October 20, 2009Date of Patent: December 3, 2013Assignee: Nippon Muki Co., Ltd.Inventors: Jun Morita, Hitoshi Niinuma, Norikazu Shinya, Tomoyuki Hasegawa, Osamu Kitayama
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Publication number: 20110314782Abstract: The invention provides a filter pack of which the mass is not increased, and moreover, the effective filter medium area is not reduced, and of which the pressure drop is sufficiently low, and the strength is sufficiently high, and an air filter using this. A pleated air filter pack is configured in such a way that dot embossed projections are provided on front and rear surfaces of a filter medium made of a non-woven fabric, the filter medium is folded in zigzag shape along creases of pleats, and the opposing embossed projections are brought into contact with each other when the filter medium is folded, thus maintaining the intervals between the filter media.Type: ApplicationFiled: October 20, 2009Publication date: December 29, 2011Applicant: NIPPON MUKI CO., LTD.Inventors: Jun Morita, Hitoshi Niinuma, Norikazu Shinya, Tomoyuki Hasegawa, Osamu Kitayama
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Publication number: 20100192531Abstract: An air filter comprising a filter pack comprising a folded nanofiber filter medium, fitted to a filter frame through a seal material, the nanofiber filter medium being a filter medium for an air filter, comprising a nanofiber filter medium which, when a filter medium face velocity is 5.3 cm/s, has a performance index of collecting target particle diameter of 0.3 ?m, 0.040 (1/Pa) or more, performance index of collecting target particle diameter of 0.1 ?m, 0.030 (1/Pa) or more, and performance index of collecting target particle diameter of 0.05 ?m, 0.050 (1/Pa) or more. By this, a high air volume and low pressure drop type high-performance air filter using a nanofiber filter medium can be provided.Type: ApplicationFiled: March 31, 2008Publication date: August 5, 2010Applicant: NIPPON MUKI CO., LTD.Inventors: Li Bao, Makoto Kobayashi, Shiro Hayashi, Jincheol Kim, Hitoshi Niinuma
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Patent number: 6540805Abstract: A high-performance filter for an intake air for a gas turbine according to the present invention includes a low-efficiency filter media and a high-efficiency filter media superposed closely on each other in the named order from an upstream side in a direction of an air flow. Each of the filter media is formed with a filtering area of 20 to 35 m2. The filter media having a filtration efficiency of 40 to 70% for particles having a particle size of 0.3 &mgr;m is disposed as a layer upstream in the air flow direction, and the filter media having a filtration efficiency of 90 to 99.99% for particles having a particle size of 0.3 &mgr;m is disposed as a downstream layer. In addition, a filter unit according to the present invention is made using the above filter, Thus, even when the filter unit is used for atmospheric dusts including a high concentration of dusts having a particle size of 0.3 to 0.Type: GrantFiled: April 18, 2001Date of Patent: April 1, 2003Assignee: Nippon Muki Co., Ltd.Inventors: Katsuhiro Ohno, Fumio Nakajima, Hitoshi Niinuma
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Publication number: 20020184862Abstract: A high-performance filter for an intake air for a gas turbine according to the present invention includes a low-efficiency filter media and a high-efficiency filter media superposed closely on each other in the named order from an upstream side in a direction of an air flow. Each of the filter media is formed with a filtering area of 20 to 35 m2. The filter media having a filtration efficiency of 40 to 70% for particles having a particle size of 0.3 &mgr;m is disposed as a layer upstream in the air flow direction, and the filter media having a filtration efficiency of 90 to 99.99% for particles having a particle size of 0.3 &mgr;m is disposed as a downstream layer. In addition, a filter unit according to the present invention is made using the above filter, Thus, even when the filter unit is used for atmospheric dusts including a high concentration of dusts having a particle size of 0.3 to 0.Type: ApplicationFiled: April 18, 2001Publication date: December 12, 2002Inventors: Katsuhiro Ohno, Fumio Nakajima, Hitoshi Niinuma