Patents by Inventor Jiajia Cheng
Jiajia Cheng 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).
-
Patent number: 11920714Abstract: A sealing structure includes an inner pipe, an outer pipe, and a sealing ring, where the outer pipe is detachably sleeved on the inner pipe, a slot for inserting a pipe is formed between an inner wall of the outer pipe and an outer wall of the inner pipe, and the outer wall of the inner pipe is provided with a sealing groove for placing the sealing ring; the sealing ring includes a main body provided with a lip; the sealing groove includes a first sealing groove and a second sealing groove, the first sealing groove and the second sealing groove are stepped; the bottom of the lip fits the bottom of the first sealing groove; and the bottom of the main body fits the bottom of the second sealing groove.Type: GrantFiled: June 5, 2020Date of Patent: March 5, 2024Assignees: RIFENG ENTERPRISE (FOSHAN) CO., LTD., RIFENG ENTERPRISE GROUP CO., LTD., RiFeng New Material Co., Ltd.Inventors: Zhenbin Diao, Ximin Li, Xiyong Lin, Jiajia Cheng, Wenfeng Chen, Huijian Cao, Ali Chen
-
Publication number: 20220307636Abstract: A sealing structure includes an inner pipe, an outer pipe, and a sealing ring, where the outer pipe is detachably sleeved on the inner pipe, a slot for inserting a pipe is formed between an inner wall of the outer pipe and an outer wall of the inner pipe, and the outer wall of the inner pipe is provided with a sealing groove for placing the sealing ring; the sealing ring includes a main body provided with a lip; the sealing groove includes a first sealing groove and a second sealing groove, the first sealing groove and the second sealing groove are stepped; the bottom of the lip fits the bottom of the first sealing groove; and the bottom of the main body fits the bottom of the second sealing groove.Type: ApplicationFiled: June 5, 2020Publication date: September 29, 2022Inventors: Zhenbin Diao, Ximin Li, Xiyong Lin, Jiajia Cheng, Wenfeng Chen, Huijian Cao, Ali Chen
-
Publication number: 20220242464Abstract: The present invention relates to an early warning protection system based on Beidou position automatic sensing, the system is in communication connection with a TDCS/CTC system, and the early warning protection system includes a locomotive train-mounted terminal subsystem, a ground early warning protection platform subsystem, and a handheld terminal subsystem, the ground early warning protection platform subsystem is in communication connection to the TDCS/CTC system, the locomotive train-mounted terminal subsystem, and the handheld terminal subsystem respectively; and the ground early warning protection platform subsystem performs judgment processing on train-to-train and train-to-person early warning logics according to Beidou positioning, a train speed, and train direction information provided by the locomotive train-mounted terminal subsystem and Beidou positioning information of the handheld terminal subsystem and with reference to station information and train number information sent by the TDCS/CTC sysType: ApplicationFiled: October 19, 2020Publication date: August 4, 2022Inventors: Jiqing NA, Jiajia CHENG, Tao WANG, Zhixin CHEN
-
Patent number: 11346479Abstract: A pipe fitting joint assembly including a guide sleeve, provided with a first concave-convex structure on the outer wall of one end thereof, a connecting body, provided with a second concave-convex structure on the inner walls of both ends thereof, and an inner gear ring provided with a third concave-convex structure on an inner ring thereof and a fourth concave-convex structure on an outer ring thereof. The inner gear ring is concentrically inserted into the connecting body. The fourth concave-convex structure and the second concave-convex structure are in interference fit. The guide sleeve is concentrically inserted into the inner ring gear of the connecting body. The first concave-convex structure and the fourth concave-convex structure are in clearance fit therebetween using a moving interference manner.Type: GrantFiled: December 29, 2018Date of Patent: May 31, 2022Assignees: RIFENG ENTERPRISE (FOSHAN) CO., LTD., RIFENG ENTERPRISE GROUP CO., LTD., RIFENG TECHNOLOGY CO., LTD.Inventors: Xiyong Lin, Jiajia Cheng, Zhenbin Diao, Xin Li, Huijian Cao, Wenfeng Chen, Jianbo Liao, Ximin Li, Ali Chen
-
Publication number: 20220057036Abstract: A connecting joint includes a connecting tube and a first compression sleeve. The connecting tube includes a first tube connecting section for connecting a first tube and a second tube connecting section for connecting a second tube. The first tube connecting section and the second tube connecting section are communicated and an annular connecting plate is arranged therebetween. The first compression sleeve is sleeved on the second tube connecting section. A first insertion hole is formed between an inner wall of the first compression sleeve and an outer wall of the second tube connecting section. A first annular groove is formed in an outer surface of one end of the second tube connecting section. An end portion of one end of the first compression sleeve close to the annular connecting plate is bent toward the second tube connecting section and inserted into the first annular groove.Type: ApplicationFiled: October 25, 2021Publication date: February 24, 2022Inventors: Huijian Cao, Zhenbin Diao, Xiyong Lin, Jiajia Cheng, Shuohao Chen
-
Publication number: 20200158274Abstract: A pipe fitting connecting method and a connecting structure, comprising the following steps of: providing an elastic sleeve (10) at the position of an end opening of a pipe material (20) in a sleeving manner, and clamping the pipe material by means of a clamping sleeve (01) of a push tool; fixing a connecting pipe body (30) to a clamping ring (02) of the push tool, the front end of an insertion end (310) of the connecting pipe body being a guiding-in section (312), the rear end of the insertion section of the connecting pipe body being an expansion section (314), the outer diameter of the guiding-in section being equal to the inner diameter of the pipe material, and a conical ring (316) with a small front end and a large rear end being provided on the periphery of the expansion section; and enabling the insertion end of the connecting pipe body (30) to be forcefully inserted into the pipe material, the pipe material and the elastic sleeve (10) being gradually expanded along the conical ring (316) of the expanType: ApplicationFiled: August 30, 2017Publication date: May 21, 2020Applicants: RIFENG ENTERPRISE GROUP CO., LTD., RIFENG TECHNOLOGY CO., LTD.Inventors: Huijian Cao, Zhenbin Diao, Xiyong Lin, Jiajia Cheng, Hui Wang, Wangzhi He, Shiyu Sun, Xiuli Fu, Yong Xie
-
Publication number: 20200096145Abstract: A pipe fitting joint assembly, comprising: a guide sleeve, provided with a first concave-convex structure on the outer wall of one end thereof; a connecting body, provided with a second concave-convex structure on the inner walls of both ends thereof; and an inner gear ring, provided with a third concave-convex structure on an inner ring thereof and a fourth concave-convex structure on an outer ring thereof. The inner gear ring is concentrically inserted into the connecting body; the fourth concave-convex structure and the second concave-convex structure are in interference fit; the guide sleeve is concentrically inserted into the inner ring gear of the connecting body; and the first concave-convex structure and the fourth concave-convex structure are in clearance fit therebetween using a moving interference manner.Type: ApplicationFiled: December 29, 2018Publication date: March 26, 2020Applicants: RIFENG ENTERPRISE (FOSHAN) CO., LTD., RIFENG ENTERPRISE GROUP CO., LTD., RIFENG TECHNOLOGY CO., LTD.Inventors: Xiyong Lin, Jiajia Cheng, Zhenbin Diao, Xin Li, Huijian Cao, Wenfeng Chen, Jianbo Liao, Ximin Li, Ali Chen
-
Patent number: 8748669Abstract: Provided is a process for producing aldehydes or ketones by oxidizing alcohols with oxygen, which comprises oxidizing alcohols to aldehydes or ketones in an organic solvent at room temperature with oxygen or air as an oxidant, wherein ferric nitrate (Fe(NO3)3.9H2O), 2,2,6,6-tetramethylpiperidine N-oxyl (TEMPO) and an inorganic chloride are used as catalysts, the reaction time is 1-24 hours, and the molar ratio of said alcohols, 2,2,6,6-tetramethylpiperidine N-oxyl and the inorganic chloride is 100:1˜10:1˜10:1˜10. The present process has the advantages of high yield, mild reaction conditions, simple operation, convenient separation and purification, recoverable solvents, substrates used therefor being various and no pollution, and therefore it is adaptable to industrialization.Type: GrantFiled: July 30, 2010Date of Patent: June 10, 2014Assignees: East China Normal University, Shanghai Institute of Organic Chemistry, Chinese Academy of SciencesInventors: Shengming Ma, Jinxian Liu, Jinqiang Kuang, Yu Liu, Yuli Wang, Qiong Yu, Weiming Yuan, Suhua Li, Bo Chen, Jiajia Cheng, Baoqiang Wan, Juntao Ye, Shichao Yu
-
Publication number: 20120220792Abstract: Provided is a process for producing aldehydes or ketones by oxidizing alcohols with oxygen, which comprises oxidizing alcohols to aldehydes or ketones in an organic solvent at room temperature with oxygen or air as an oxidant, wherein ferric nitrate (Fe(NO3)3.9H2O), 2,2,6,6-tetramethylpiperidine N-oxyl (TEMPO) and an inorganic chloride are used as catalysts, the reaction time is 1-24 hours, and the molar ratio of said alcohols, 2,2,6,6-tetramethylpiperidine N-oxyl and the inorganic chloride is 100:1˜10:1˜10:1˜10. The present process has the advantages of high yield, mild reaction conditions, simple operation, convenient separation and purification, recoverable solvents, substrates used therefor being various and no pollution, and therefore it is adaptable to industrialization.Type: ApplicationFiled: July 30, 2010Publication date: August 30, 2012Inventors: Shengming Ma, Jinxian Liu, Jinqiang Kuang, Yu Liu, Yuli Wang, Qiong Yu, Weiming Yuan, Suhua Li, Bo Chen, Jiajia Cheng, Baoqiang Wan, Juntao Ye, Shichao Yu