Patents by Inventor Changxiang Xu
Changxiang Xu 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: 11841092Abstract: A pressure-tight stein cylinder seal and a self-energizing stein shoulder seal matching the stein cylinder seal that both use an equilaterally triangular soft ring as their sealing element, wherein their designing rules are first, by means of wedging function of a hard gland coaxial with the stein cylinder, to convert their original axial tightening force 2f respectively into a radial compression force 4f/?3 of their soft ring 04 on the stein 02 cylinder and another radial compression force 2f of their soft ring 06 on the stein 02 shoulder and ensure that the two soft rings are so compressed from a great room to a small room as to be able to pass a pressure or stress exactly to each different direction, then to cut off their off-stein corners to give their cavities an opening or give each soft ring an axial compressing allowance, and last, by means of anti-extrusion metallic C-rings without axial resistance, to close each opening to provide a full support for the sealing deformation of their soft rings compreType: GrantFiled: October 7, 2022Date of Patent: December 12, 2023Assignee: BAOYI GROUP CO., LTD.Inventors: Changxiang Xu, Xiaozhong Zhang
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Publication number: 20230106630Abstract: A pressure-tight stein cylinder seal and a self-energizing stein shoulder seal matching the stein cylinder seal that both use an equilaterally triangular soft ring as their sealing element, wherein their designing rules are first, by means of wedging function of a hard gland coaxial with the stein cylinder, to convert their original axial tightening force 2f respectively into a radial compression force 4f/?3 of their soft ring 04 on the stein 02 cylinder and another radial compression force 2f of their soft ring 06 on the stein 02 shoulder and ensure that the two soft rings are so compressed from a great room to a small room as to be able to pass a pressure or stress exactly to each different direction, then to cut off their off-stein corners to give their cavities an opening or give each soft ring an axial compressing allowance, and last, by means of anti-extrusion metallic C-rings without axial resistance, to close each opening to provide a full support for the sealing deformation of their soft rings compreType: ApplicationFiled: October 7, 2022Publication date: April 6, 2023Inventors: Changxiang Xu, Xiaozhong Zhang
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Patent number: 11543053Abstract: A pressure-tight stem cylinder seal and a self-energizing stem shoulder seal matching the stem cylinder seal that both use an equilaterally triangular soft ring as their sealing element, wherein their designing rules are first, by means of wedging function of a hard gland coaxial with the stem cylinder, to convert their original axial tightening force 2f respectively into a radial compression force 4f/?3 of their soft ring 04 on the stem 02 cylinder and another radial compression force 2f of their soft ring 06 on the stem 02 shoulder and ensure that the two soft rings are so compressed from a great room to a small room as to be able to pass a pressure or stress exactly to each different direction, then to cut off their off-stem corners to give their cavities an opening or give each soft ring an axial compressing allowance, and last, by means of anti-extrusion metallic C-rings without axial resistance, to close each opening to provide a full support for the sealing deformation of their soft rings compressed inType: GrantFiled: November 14, 2018Date of Patent: January 3, 2023Assignee: BAOYI GROUP CO., LTD.Inventors: Changxiang Xu, Xiaozhong Zhang
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Publication number: 20220018462Abstract: A pressure-tight stem cylinder seal and a self-energizing stem shoulder seal matching the stem cylinder seal that both use an equilaterally triangular soft ring as their sealing element, wherein their designing rules are first, by means of wedging function of a hard gland coaxial with the stem cylinder, to convert their original axial tightening force 2f respectively into a radial compression force 4f/?3 of their soft ring 04 on the stem 02 cylinder and another radial compression force 2f of their soft ring 06 on the stem 02 shoulder and ensure that the two soft rings are so compressed from a great room to a small room as to be able to pass a pressure or stress exactly to each different direction, then to cut off their off-stem corners to give their cavities an opening or give each soft ring an axial compressing allowance, and last, by means of anti-extrusion metallic C-rings without axial resistance, to close each opening to provide a full support for the sealing deformation of their soft rings compressed inType: ApplicationFiled: November 14, 2018Publication date: January 20, 2022Inventors: Changxiang Xu, Xiaozhong Zhang
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Patent number: 10996133Abstract: A tightness-gauging device and a meter for gauging a pressure's sustainability pt for a pressure vessel or system are provided. A pressure is produced against the test fluid inside a piston cylinder communicated with the tested vessel or system by a fixed-pressure supplying assembly including a weight, a piston, and a piston cylinder successively arranged coaxially and vertically. An equation RL=pt/C is used to represent the tightness of the pressure vessel or system. The equation pt=p(p?0.5?p)?t/?p is used in the meter for gauging the pressure's sustainability pt to express the pressure's sustainability, where p is the fixed test pressure, t is the elapsed time for the fluid to leak completely, C is the cubage of the pressure vessel or system, ?p is the drop value of the pressure, and ?t is the elapsed time for the pressure to descend from p to (p??p) caused by the leakage.Type: GrantFiled: July 26, 2016Date of Patent: May 4, 2021Assignee: BAOYI GROUP CO. LTD.Inventors: Changxiang Xu, Xiaozhong Zhang, Xiaoqiu Zhang
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Patent number: 10675584Abstract: Methods, apparatus, and compositions for cleaning gas. The use of segmented multistage ammonia-based liquid spray with different oxidation potentials to remove sulfur compounds from gas. The use of different oxidation potentials may reduce unwanted ammonia slip.Type: GrantFiled: August 15, 2019Date of Patent: June 9, 2020Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Changxiang Xu
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Patent number: 10561982Abstract: Apparatus and methods for desulfurization of a sulfur-oxide containing gas by treatment with ammonia containing liquids. The apparatus and methods may utilize two distinct circuits of two different ammonia containing liquids which are applied in two distinct chambers. The gas may be cooled prior to entry into the circuits. There may be fluid communication between the two circulation circuits.Type: GrantFiled: July 26, 2019Date of Patent: February 18, 2020Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Changxiang Xu, Xiangjun Xu, Yongying Luo
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Publication number: 20190374906Abstract: Methods, apparatus, and compositions for cleaning gas. The use of segmented multistage ammonia-based liquid spray with different oxidation potentials to remove sulfur compounds from gas. The use of different oxidation potentials may reduce unwanted ammonia slip.Type: ApplicationFiled: August 15, 2019Publication date: December 12, 2019Inventors: Jing Luo, Changxiang Xu
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Publication number: 20190344216Abstract: Apparatus and methods for desulfurization of a sulfur-oxide containing gas by treatment with ammonia containing liquids. The apparatus and methods may utilize two distinct circuits of two different ammonia containing liquids which are applied in two distinct chambers. The gas may be cooled prior to entry into the circuits. There may be fluid communication between the two circulation circuits.Type: ApplicationFiled: July 26, 2019Publication date: November 14, 2019Inventors: Jing Luo, Changxiang Xu, Xiangjun Xu, Yongying Luo
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Patent number: 10413864Abstract: Methods, apparatus, and compositions for cleaning gas. The use of segmented multistage ammonia-based liquid spray with different oxidation potentials to remove sulfur compounds from gas. The use of different oxidation potentials may reduce unwanted ammonia slip.Type: GrantFiled: January 10, 2019Date of Patent: September 17, 2019Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Changxiang Xu
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Patent number: 10413865Abstract: Apparatus and methods for desulfurization of a sulfur-oxide containing gas by treatment with ammonia containing liquids. The apparatus and methods may utilize two distinct circuits of two different ammonia containing liquids which are applied in two distinct chambers. The gas may be cooled prior to entry into the circuits. There may be fluid communication between the two circulation circuits.Type: GrantFiled: November 13, 2018Date of Patent: September 17, 2019Assignee: Jiangnan Enviromental Protection Group Inc.Inventors: Jing Luo, Changxiang Xu, Xiangjun Xu, Yongying Luo
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Patent number: 10406477Abstract: Methods, apparatus, and compositions for cleaning gas. The use of segmented multistage ammonia-based liquid spray with different oxidation potentials to remove sulfur compounds from gas. The use of different oxidation potentials may reduce unwanted ammonia slip.Type: GrantFiled: October 15, 2018Date of Patent: September 10, 2019Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Changxiang Xu
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Patent number: 10406478Abstract: Apparatus and methods for desulfurization of a sulfur-oxide containing gas by treatment with ammonia containing liquids. The apparatus and methods may utilize two distinct circuits of two different ammonia containing liquids which are applied in two distinct chambers. The gas may be cooled prior to entry into the circuits. There may be fluid communication between the two circulation circuits.Type: GrantFiled: June 26, 2018Date of Patent: September 10, 2019Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Changxiang Xu, Xiangjun Xu, Yongying Luo
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Patent number: 10399033Abstract: Apparatus and methods for desulfurization of a sulfur-oxide containing gas by treatment with ammonia containing liquids. The apparatus and methods may utilize two distinct circuits of two different ammonia containing liquids which are applied in two distinct chambers. The gas may be cooled prior to entry into the circuits. There may be fluid communication between the two circulation circuits.Type: GrantFiled: March 19, 2019Date of Patent: September 3, 2019Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Changxiang Xu, Xiangjun Xu, Yongying Luo
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Publication number: 20190209963Abstract: Apparatus and methods for desulfurization of a sulfur-oxide containing gas by treatment with ammonia containing liquids. The apparatus and methods may utilize two distinct circuits of two different ammonia containing liquids which are applied in two distinct chambers. The gas may be cooled prior to entry into the circuits. There may be fluid communication between the two circulation circuits.Type: ApplicationFiled: March 19, 2019Publication date: July 11, 2019Inventors: Jing Luo, Changxiang Xu, Xiangjun Xu, Yongying Luo
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Publication number: 20190143265Abstract: Methods, apparatus, and compositions for cleaning gas. The use of segmented multistage ammonia-based liquid spray with different oxidation potentials to remove sulfur compounds from gas. The use of different oxidation potentials may reduce unwanted ammonia slip.Type: ApplicationFiled: January 10, 2019Publication date: May 16, 2019Inventors: Jing Luo, Changxiang Xu
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Publication number: 20190076780Abstract: Apparatus and methods for desulfurization of a sulfur-oxide containing gas by treatment with ammonia containing liquids. The apparatus and methods may utilize two distinct circuits of two different ammonia containing liquids which are applied in two distinct chambers. The gas may be cooled prior to entry into the circuits. There may be fluid communication between the two circulation circuits.Type: ApplicationFiled: November 13, 2018Publication date: March 14, 2019Inventors: Jing Luo, Changxiang Xu, Xiangjun Xu, Yongying Luo
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Patent number: 10207220Abstract: Methods, apparatus, and compositions for cleaning gas. The use of segmented multistage ammonia-based liquid spray with different oxidation potentials to remove sulfur compounds from gas. The use of different oxidation potentials may reduce unwanted ammonia slip.Type: GrantFiled: April 7, 2017Date of Patent: February 19, 2019Assignee: Jiangnan Environmental Protection Group Inc.Inventors: Jing Luo, Changxiang Xu
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Publication number: 20190046925Abstract: Methods, apparatus, and compositions for cleaning gas. The use of segmented multistage ammonia-based liquid spray with different oxidation potentials to remove sulfur compounds from gas. The use of different oxidation potentials may reduce unwanted ammonia slip.Type: ApplicationFiled: October 15, 2018Publication date: February 14, 2019Inventors: Jing Luo, Changxiang Xu
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Publication number: 20190025153Abstract: A sealing tightness measuring device and a pressure-retaining capability measuring gauge for a pressure container or system is provided. A pressure is produced against the testing fluid inside a piston cylinder communicated with the tested container or system by an assembly including a weight, a piston, and a piston cylinder successively arranged through a coaxial plumb bob. An equation RL=pt/C is used to represent the sealing tightness of the pressure container or system. The equation pt=p(p?0.5?p)?t/?p is used in the pressure-retaining capability measuring gauge to express the pressure-retaining capability, wherein p is the fixed testing fluid pressure, t is the elapsed time for the fluid to leak completely, C is the volume of the pressure container or system, ?p is the drop value of the pressure, and ?t is the elapsed time for the pressure to descend from p to (p??p) caused by the leakage.Type: ApplicationFiled: July 26, 2016Publication date: January 24, 2019Applicant: BAOYI GROUP CO. LTD.Inventors: Changxiang XU, Xiaozhong ZHANG, Xiaoqiu ZHANG