Patents Assigned to Ishigaki Company Limited
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Publication number: 20240060887Abstract: A filter-press filter-cloth damage detection device for a filter press includes a detection path and a detection device. In the filter press, a filtrate produced by solid-liquid separation operation of a filter cloth nipped between filter plates is discharged into a collection pipe via a filtrate passage of each of the filter plates. The detection path extends in a straight line. A filtrate discharged from each of filtration chambers formed between adjacent filter plates is collected to the detection path. The detection device is configured to transmit, from an end portion of the detection path, an irradiation wave or a pulse that reflects on an interface between a clear filtrate and a filtrate with a prescribed turbidity, convert a propagation time from the transmission until reception of a reflected wave into a distance, and output the distance.Type: ApplicationFiled: July 27, 2023Publication date: February 22, 2024Applicant: ISHIGAKI COMPANY LIMITEDInventor: Yusuke SHIBAKAWA
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Publication number: 20230097066Abstract: A washing pipe is mounted on a washing guide provided on an outer side of an outer cylinder screen of the screw press and includes a washing pipe body and washing nozzles provided in the washing pipe body and configured to discharge washing liquid flowing from an inside of the washing pipe body toward the outer cylinder screen. A washing pipe swing supporter is configured to support the washing guide to allow the washing pipe to swing between a discharge position and a separation position. The discharge position is a position where the washing pipe is mounted on the washing guide and the washing liquid is discharged from the washing nozzles toward the outer cylinder screen. The separation position is a position where the washing nozzles are farther away from the outer cylinder screen than in a state where the washing pipe is positioned at the discharge position.Type: ApplicationFiled: July 28, 2022Publication date: March 30, 2023Applicant: ISHIGAKI COMPANY LIMITEDInventors: Atsushi KONDO, Kuniyoshi OONISHI, Yuuichi ISHIZAKI, Hideki FUJISAWA, Yasufumi AZUMA, Atsumi KITAYAMA, Takuho KIMURA, Nobuo HONDA
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Patent number: 11401188Abstract: A sludge dehydration method includes a recovery process of recovering specific material as a dewatering aid from sludge generated in a sewage treatment process and a dewatering process of performing solid-liquid separation on sludge in which the dewatering aid recovered in the recovery process and dewatering target sludge are mixed.Type: GrantFiled: April 12, 2018Date of Patent: August 2, 2022Assignee: ISHIGAKI COMPANY LIMITEDInventors: Manabu Yamashita, Masakazu Morita, Hiroyuki Mino, Yasuaki Nishihara, Atsushi Yanai, Ryosuke Tamauchi, Yasutaka Suetsugu, Masayoshi Katayama
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Publication number: 20210387114Abstract: A method of cleaning a filter cloth of a filter press including a first cleaning nozzle and a second cleaning nozzle which jet cleaning liquid from positions upper right and left of the filter cloth toward respective diagonal corners of the filter cloth, the method including: jetting the cleaning liquid from only the first cleaning nozzle; and jetting the cleaning liquid from only the second cleaning nozzle.Type: ApplicationFiled: October 21, 2019Publication date: December 16, 2021Applicant: ISHIGAKI COMPANY LIMITEDInventors: Daisuke YAMAMOTO, Koji HARA, Shoji MOTOYA
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Patent number: 10974982Abstract: A recovery device is configured to recover specific material as a dewatering aid from sludge generated in a sewage treatment process. The recovery device includes: a grinder configured to fragment a solid in the sludge to obtain prepared sludge; a separator configured to separate hardly decomposable organic matter and easily decomposable organic matter from the prepared sludge; and an extractor configured to continuously extract hardly decomposable organic matter having specific properties as the dewatering aid from the hardly decomposable organic matter separated by the separator.Type: GrantFiled: January 6, 2016Date of Patent: April 13, 2021Assignee: ISHIGAKI COMPANY LIMITEDInventors: Manabu Yamashita, Masakazu Morita, Hiroyuki Mino, Yasuaki Nishihara, Atsushi Yanai, Ryosuke Tamauchi, Yasutaka Suetsugu, Masayoshi Katayama
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Patent number: 10252482Abstract: A pair of filter cloths is wound around a first roll a plurality of times by being wound around the first roll, then being wound around a second roll to return to a space between the first roll and the pair of filter cloths wound around the first roll, and being wound around the first roll again. The pair of filter cloths wound around the first roll the plurality of times applies a pressing force to the first roll.Type: GrantFiled: October 10, 2014Date of Patent: April 9, 2019Assignee: ISHIGAKI COMPANY LIMITEDInventors: Katsunobu Mizobuchi, Takahiko Ishimaru, Toshifumi Ohgihata
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Patent number: 10252192Abstract: A filter medium includes: a core yarn and a binder yarn twisted together, at least one of the core yarn or the binder yarn being weldable; and a filament yarn being fuzzy and weldable, the filament yarn being welded to at least one of the core yarn or the binder yarn while being placed between the core yarn and the binder yarn as twisted together. A filtering device for filtering a liquid to be treated with a filter medium layer includes the filter medium. A method of manufacturing the filter medium is also disclosed.Type: GrantFiled: October 6, 2011Date of Patent: April 9, 2019Assignee: ISHIGAKI COMPANY LIMITEDInventors: Kunio Fujita, Hidetaka Ujike, Takahiko Ishimaru, Fumikatsu Nagai
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Publication number: 20180230036Abstract: A sludge dehydration method includes a recovery process of recovering specific material as a dewatering aid from sludge generated in a sewage treatment process and a dewatering process of performing solid-liquid separation on sludge in which the dewatering aid recovered in the recovery process and dewatering target sludge are mixed.Type: ApplicationFiled: April 12, 2018Publication date: August 16, 2018Applicant: ISHIGAKI COMPANY LIMITEDInventors: Manabu YAMASHITA, Masakazu MORITA, Hiroyuki MINO, Yasuaki NISHIHARA, Atsushi YANAI, Ryosuke TAMAUCHI, Yasutaka SUETSUGU, Masayoshi KATAYAMA
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Patent number: 9975798Abstract: A sludge dehydration method includes a recovery process of recovering specific material as a dewatering aid from sludge generated in a sewage treatment process and a dewatering process of performing solid-liquid separation on sludge in which the dewatering aid recovered in the recovery process and dewatering target sludge are mixed.Type: GrantFiled: January 6, 2016Date of Patent: May 22, 2018Assignee: ISHIGAKI COMPANY LIMITEDInventors: Manabu Yamashita, Masakazu Morita, Hiroyuki Mino, Yasuaki Nishihara, Atsushi Yanai, Ryosuke Tamauchi, Yasutaka Suetsugu, Masayoshi Katayama
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Patent number: 9718004Abstract: A filter medium layer includes filter media configured to capture suspended solids contained in a liquid to be treated and filtering aids configured to allow the suspended solids contained in the liquid to be treated to pass through the filtering aids. The filter media and the filtering aids are mixed together and the liquid to be treated is filtered by being passed through the filter media and the filtering aids as mixed together. A filter device includes the filter medium layer and a filter tank configured to accommodate the filter medium layer.Type: GrantFiled: September 21, 2012Date of Patent: August 1, 2017Assignee: ISHIGAKI COMPANY LIMITEDInventors: Kunio Fujita, Hidetaka Ujike
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Publication number: 20160221290Abstract: A pair of filter cloths is wound around a first roll a plurality of times by being wound around the first roll, then being wound around a second roll to return to a space between the first roll and the pair of filter cloths wound around the first roll, and being wound around the first roll again. The pair of filter cloths wound around the first roll the plurality of times applies a pressing force to the first roll.Type: ApplicationFiled: October 10, 2014Publication date: August 4, 2016Applicant: ISHIGAKI COMPANY LIMITEDInventors: Katsunobu MIZOBUCHI, Takahiko ISHIMARU, Toshifumi OHGIHATA
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Publication number: 20160115065Abstract: A recovery device is configured to recover specific material as a dewatering aid from sludge generated in a sewage treatment process. The recovery device includes: a grinder configured to fragment a solid in the sludge to obtain prepared sludge; a separator configured to separate hardly decomposable organic matter and easily decomposable organic matter from the prepared sludge; and an extractor configured to continuously extract hardly decomposable organic matter having specific properties as the dewatering aid from the hardly decomposable organic matter separated by the separator.Type: ApplicationFiled: January 6, 2016Publication date: April 28, 2016Applicant: ISHIGAKI COMPANY LIMITEDInventors: Manabu Yamashita, Masakazu Morita, Hiroyuki Mino, Yasuaki Nishihara, Atsushi Yanai, Ryosuke Tamauchi, Yasutaka Suetsugu, Masayoshi Katayama
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Publication number: 20160115066Abstract: A sludge dehydration method includes a recovery process of recovering specific material as a dewatering aid from sludge generated in a sewage treatment process and a dewatering process of performing solid-liquid separation on sludge in which the dewatering aid recovered in the recovery process and dewatering target sludge are mixed.Type: ApplicationFiled: January 6, 2016Publication date: April 28, 2016Applicant: ISHIGAKI COMPANY LIMITEDInventors: Manabu Yamashita, Masakazu Morita, Hiroyuki Mino, Yasuaki Nishihara, Atsushi Yanai, Ryosuke Tamauchi, Yasutaka Suetsugu, Masayoshi Katayama
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Patent number: 8881648Abstract: A concentrator-integrated screw press includes: a continuous concentrator configured to continuously concentrate sludge and discharge the sludge as concentrated sludge, and including a discharge amount equalization unit configured to equalize an amount of concentrated sludge to be discharged per unit time; a positive displacement pump installed consecutively to the concentrator, and configured to continuously transport the concentrated sludge discharged from the concentrator; and a screw press installed consecutively to a discharge side of the positive displacement pump, and configured to compress and dewater the concentrated sludge.Type: GrantFiled: February 1, 2010Date of Patent: November 11, 2014Assignee: Ishigaki Company LimitedInventors: Manabu Yamashita, Masaharu Miyawaki, Masayoshi Katayama
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Publication number: 20140291224Abstract: An indefinite form filter medium layer includes filter media configured to capture suspended solids contained in a liquid to be treated and filtering aids configured to allow the suspended solids contained in the liquid to be treated to pass through the filtering aids. The filter media and the filtering aids are mixed together and the liquid to be treated is filtered by being passed through the filter media and the filtering aids as mixed together. A filter device includes the indefinite form filter medium layer and a filter tank configured to accommodate the indefinite form filter medium layer.Type: ApplicationFiled: September 21, 2012Publication date: October 2, 2014Applicant: ISHIGAKI COMPANY LIMITEDInventors: Kunio Fujita, Hidetaka Ujike
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Publication number: 20130248439Abstract: A filter medium includes: a core yarn and a binder yarn twisted together, at least one of the core yarn or the binder yarn being weldable; and a filament yarn being fuzzy and weldable, the filament yarn being welded to at least one of the core yarn or the binder yarn while being placed between the core yarn and the binder yarn as twisted together. A filtering device for filtering a liquid to be treated with a filter medium layer including includes the filter medium. A method of manufacturing the filter medium is also disclosed.Type: ApplicationFiled: October 6, 2011Publication date: September 26, 2013Applicant: ISHIGAKI COMPANY LIMITEDInventors: Kunio Fujita, Hidetaka Ujike, Takahiko Ishimaru, Fumikatsu Nagai
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Publication number: 20130043175Abstract: A device for attaching an undiluted-liquid supply plate to a filter cloth includes: a leg to be placed inside a first through hole formed in the filter cloth and inside a second through hole formed in the undiluted-liquid supply plate; a flange provided at an end portion of the leg and having a diameter larger than diameters of the first through hole and the second through hole; and an elastic deformation portion configured to be elastically deformed in a radial direction of the second through hole to allow and restrict movement of the leg placed inside the first and second through holes in an axial direction of the second through hole.Type: ApplicationFiled: April 25, 2011Publication date: February 21, 2013Applicant: ISHIGAKI COMPANY LIMITEDInventors: Koji Hara, Nobuo Honda, Kazuhisa Otani, Nobuhiro Mineo, Shoji Motoya, Daisuke Yamamoto
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Publication number: 20110297016Abstract: A concentrator-integrated screw press includes: a continuous concentrator configured to continuously concentrate sludge and discharge the sludge as concentrated sludge, and including a discharge amount equalization unit configured to equalize an amount of concentrated sludge to be discharged per unit time; a positive displacement pump installed consecutively to the concentrator, and configured to continuously transport the concentrated sludge discharged from the concentrator; and a screw press installed consecutively to a discharge side of the positive displacement pump, and configured to compress and dewater the concentrated sludge.Type: ApplicationFiled: February 1, 2010Publication date: December 8, 2011Applicant: ISHIGAKI COMPANY LIMITEDInventors: Manabu Yamashita, Masaharu Miyawaki, Masayoshi Katayama
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Patent number: D655779Type: GrantFiled: April 22, 2011Date of Patent: March 13, 2012Assignee: ISHIGAKI Company LimitedInventors: Nobuo Honda, Yukitoshi Mitani, Kazuhisa Otani
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Patent number: D655780Type: GrantFiled: April 22, 2011Date of Patent: March 13, 2012Assignee: ISHIGAKI Company LimitedInventors: Nobuo Honda, Yukitoshi Mitani, Kazuhisa Otani