Patents by Inventor Tomoyuki Fujita
Tomoyuki Fujita 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: 8426527Abstract: Obtaining a crosslinked rubber with high flexibility at low temperature includes crosslinking a fluororubber composition. The fluororubber composition includes a fluororubber and a compound of formula (X—)x(Z—)zY. In the formula, X is U—(CF2)aO(CF2CF2O)b—; Z is RFO(CF2CF2O)c—; Y is a (x+z) valent perfluoro saturated hydrocarbon group, optionally interrupted by an etheric oxygen atom; x is an integer of at least 3; z is an integer of at least 0; U is a monovalent group with an unsaturated hydrocarbon, a bromine atom, an iodine atom, or a combination thereof; RF is a C1-20 linear perfluoroalkyl group, optionally interrupted by an etheric oxygen atom; a is an integer of from 0 to 20; b is an integer of from 1 to 200; and c is an integer of from 3 to 200.Type: GrantFiled: March 22, 2012Date of Patent: April 23, 2013Assignee: Asahi Glass Company, LimitedInventors: Makoto Honda, Tomoyuki Fujita, Kunio Watanabe, Daisuke Shirakawa
-
Publication number: 20130017334Abstract: To provide a coating composition containing a fluorinated copolymer having repeating units derived from ethylene and tetrafluoroethylene, which can be formed into a coating film by coating and which can be produced at a relatively low temperature, and a process for its production, and a process for forming a coating film of the fluorinated copolymer by using this composition, which can be carried out at a relatively low temperature. A coating composition comprising microparticles of a fluorinated copolymer (ETFE) having repeating units derived from ethylene and repeating units derived from tetrafluoroethylene, and a solvent capable of dissolving ETFE at a temperature of not higher than the melting point of ETFE, wherein the microparticles of ETFE are microparticles precipitated from a solution having ETFE dissolved in the solvent, and are dispersed in the solvent.Type: ApplicationFiled: September 14, 2012Publication date: January 17, 2013Applicant: ASAHI GLASS COMPANY, LimitedInventors: Takashi NAKANO, Tomoyuki FUJITA, Hiroshi YAMAMOTO, Yoshitomo MORIZAWA, Naoko SHIROTA
-
Patent number: 8348646Abstract: A variable displacement vane pump includes a first and a second fluid pressure chamber (31,32) where the cam ring (4) is made eccentric to the rotor (2) by a pressure difference between the first and the second fluid pressure chamber (31,32), a control valve (21) for controlling a pressure of the first and the second fluid pressure chamber (31,32) so that an eccentric amount of the cam ring (4) is reduced to be small with an increase in a rotation speed of the rotor (2), a pressure applying section (36) for applying a pressure to the cam ring (4) in a direction of increasing the eccentric amount all the time, and a cam ring movement restricting portion (12) for defining a minimum eccentric amount of the cam ring (4) by restricting the movement of the cam ring (4) in a direction of decreasing the eccentric amount.Type: GrantFiled: April 13, 2009Date of Patent: January 8, 2013Assignee: Kayaba Industry Co., Ltd.Inventors: Tomoyuki Fujita, Masamichi Sugihara, Hiroshi Shiozaki, Koichiro Akatsuka
-
Patent number: 8342826Abstract: A variable capacity vane pump (100) has a pump housing (10) having a high-load bearing part (10a) on which a higher load is exerted than another part when the pump vane pump (100) operates. A control valve (21) for varying a capacity of the vane pump (100) is provided in a valve housing (28) which is formed integrally in the pump housing (10). By arranging the valve housing (28) on the same side of the pump housing (10) as the high-load bearing part (10a) with respect to the rotation axis of the vane pump (100), the high-load bearing part (10a) can be reinforced without increasing the size of the vane pump (100).Type: GrantFiled: August 7, 2009Date of Patent: January 1, 2013Assignee: Kayaba Industry Co., Ltd.Inventors: Tomoyuki Fujita, Masamichi Sugihara, Hiroshi Shiozaki, Koichiro Akatsuka
-
Patent number: 8342817Abstract: A variable displacement vane pump includes a first and a second fluid pressure chamber (31,32) where the cam ring (4) is made eccentric to the rotor (2) by a pressure difference between the first and the second fluid pressure chamber (31,32), a control valve (21) for controlling a pressure of the first and the second fluid pressure chamber (31,32) so that an eccentric amount of the cam ring (4) is reduced to be small with an increase in a rotation speed of the rotor (2), and a flow amount limiting member (22e) for limiting a discharge flow amount of the operating fluid in the second fluid pressure chamber (32) at the time the eccentric amount of the cam ring (4) to the rotor (2) becomes small by supplying the operating fluid to the first fluid pressure chamber (31) and by discharging the operating fluid from the second fluid pressure chamber (32).Type: GrantFiled: April 20, 2009Date of Patent: January 1, 2013Assignee: Kayaba Industry Co., Ltd.Inventors: Tomoyuki Fujita, Masamichi Sugihara, Hiroshi Shiozaki, Koichiro Akatsuka
-
Publication number: 20120202950Abstract: Obtaining a crosslinked rubber with high flexibility at low temperature includes crosslinking a fluororubber composition. The fluororubber composition includes a fluororubber and a compound of formula (X—)x(Z—)zY. In the formula, X is U—(CF2)aO(CF2CF2O)b—; Z is RFO(CF2CF2O)c—; Y is a (x+z) valent perfluoro saturated hydrocarbon group, optionally interrupted by an etheric oxygen atom; x is an integer of at least 3; z is an integer of at least 0; U is a monovalent group with an unsaturated hydrocarbon, a bromine atom, an iodine atom, or a combination thereof; RF is a C1-20 linear perfluoroalkyl group, optionally interrupted by an etheric oxygen atom; a is an integer of from 0 to 20; b is an integer of from 1 to 200; and c is an integer of from 3 to 200.Type: ApplicationFiled: March 22, 2012Publication date: August 9, 2012Applicant: Asahi Glass Company, LimitedInventors: Makoto HONDA, Tomoyuki Fujita, Kunio Watanabe, Daisuke Shirakawa
-
Patent number: 8187136Abstract: In a differential gear, a differential case includes: a first differential case on a side ranging from a pinion-shaft installation part on which a pinion shaft is installed, to a ring gear; and a second differential case on a side opposite to the side ranging from a pinion-shaft installation part on which the pinion shaft is installed, to the ring gear. The first differential case is integrally molded from only a low-carbon steel containing less than 0.45% of C, by forging or by forging and cutting. The second differential case is integrally molded from only a low-carbon steel containing less than 0.45% of C, by forging or by forging and cutting. The first differential case and the second differential case are bonded to each other by welding.Type: GrantFiled: September 25, 2008Date of Patent: May 29, 2012Assignee: Musashi Seimitsu Industry Co., Ltd.Inventors: Tomoyuki Fujita, Akira Mataga
-
Publication number: 20120108723Abstract: To provide a composition comprising a fluorocopolymer such as an ETFE which can be produced at a relatively low temperature, and its production process. A fluorocopolymer composition which comprises a fluorocopolymer such as an ETFE and a C6-10 aliphatic compound having one carbonyl group, and which is in a solution state being at a temperature of at most the melting point of the fluorocopolymer, and a process for producing the fluorocopolymer composition, which comprises a step of dissolving the fluorocopolymer in the aliphatic compound having one carbonyl group at a temperature of at most the melting point of the fluorocopolymer.Type: ApplicationFiled: January 3, 2012Publication date: May 3, 2012Applicant: Asahi Glass Company, LimitedInventors: Takashi NAKANO, Tomoyuki Fujita, Hiroshi Yamamoto, Yoshitomi Morizawa
-
Patent number: 8081053Abstract: A solenoid actuator (1) comprises a case (9) made of a magnetic material and housing a coil (12) wound on a bobbin (11), and a pressure tube (17) made of a non-magnetic material and fitted into a hollow portion of the bobbin (11). A base (2) and a sleeve (3) made of a magnetic material are disposed in the pressure tube (17). A plunger (4) provided in an operation chamber (74, 75) formed in the base (2) and the sleeve (3) strokes according to energization of the coil (12) to axially drive a shaft (5) fixed to the plunger (4). The pressure tube (17) ensures that magnetic flux is transferred between the case (9) and the sleeve (3) while preventing pressure variation in the operation chamber (74, 75) from being transmitted to the bobbin (11), thereby achieving a high response and a pressure tightness in the solenoid actuator (1).Type: GrantFiled: November 12, 2009Date of Patent: December 20, 2011Assignee: Kayaba Industry Co., Ltd.Inventors: Hideki Yamagata, Mamoru Hosogai, Hideki Tsuchiya, Yoshiharu Miya, Tomoyuki Fujita, Ryuji Naide, Koichiro Akatsuka, Kenji Yazaki, Masato Ikeguchi
-
Patent number: 8074427Abstract: A method and an apparatus for producing a container packing filler are provided, which ensure that a net can be correctly and speedily rolled up into a bulk or ball shape. A stretchable tubular net (N) is fitted around a columnar support member (6). Then, a distal portion of the net is forcibly folded radially outward or inward by a plurality of roller belts (30) disposed circumferentially of the net (N), while the roller belts (30) are moved toward a net proximal side axially of the net (N), whereby the net (N) is rolled up radially outward or inward with the distal portion thereof being forcibly folded by circular rotation and axial movement of the roller belts (30) to form an annular roll portion (C).Type: GrantFiled: March 29, 2007Date of Patent: December 13, 2011Assignees: Taisei Kako Co., Ltd., Shionogi & Co.Inventors: Yasuyuki Shiraishi, Kenji Ohnishi, Tomoyuki Fujita, Masato Tsuji, Shinji Hiramoto
-
Patent number: 8058973Abstract: A radio frequency identification system, including: a radio frequency identification tag having an identification code and a set of verifiable data stored therein; and a radio frequency identification reader which sends a reading request to the radio frequency identification tag, requesting to read a first portion of the set of verifiable data, wherein the radio frequency identification tag further comprising control means, which, when the radio frequency identification tag receives the reading request from the radio frequency identification reader, in case of that the set of verifiable data has not been performed a locking operation, performs the locking operation on the set of verifiable data, so that from then on any data of a second portion of the set of verifiable data cannot be read.Type: GrantFiled: September 12, 2006Date of Patent: November 15, 2011Assignee: NEC (China) Co., Ltd.Inventors: Ke Zeng, Tomoyuki Fujita, Min-yu Hsueh
-
Publication number: 20110178193Abstract: To provide a method for easily producing an ethylene/tetrafluoroethylene copolymer porous material having excellent chemical resistance and filtration performance and has a high heat resistance, within a wide range of the porosity, and an ethylene/tetrafluoroethylene copolymer porous material obtained by such a process. A process for producing an ethylene/tetrafluoroethylene copolymer porous material which comprises a step of dissolving an ethylene/tetrafluoroethylene copolymer having repeating units based on ethylene and repeating units based on tetrafluoroethylene at a temperature of at most 300° C. in a solvent which can dissolve the ethylene/tetrafluoroethylene copolymer at a temperature of at most 300° C., to achieve a predetermined concentration to obtain a solution, a step of forming the solution to obtain a formed product, and a step of cooling the formed product to a temperature of at most the phase separation temperature of the solution to solidify the ethylene/tetrafluoroethylene copolymer.Type: ApplicationFiled: March 25, 2011Publication date: July 21, 2011Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Ken IRUYA, Takashi Nakano, Tomoyuki Fujita, Yoshitomi Morizawa
-
Publication number: 20110172336Abstract: To provide a composition comprising a fluorocopolymer such as an ethylene/tetrafluoroethylene copolymer which can be produced at a relatively low temperature, and its production process. A fluorocopolymer composition which comprises a fluorocopolymer such as an ethylene/tetrafluoroethylene copolymer and a fluorinated aromatic compound having a melting point of at most 230° C. and having a fluorine content in the compound of from 5 to 75 mass %, and is in a solution state at a temperature of at most the melting point of the fluorocopolymer, and a process for producing the fluorocopolymer composition, which comprises a step of dissolving the fluorocopolymer in a solvent containing the fluorinated aromatic compound at a temperature of at most the melting point of the fluorocopolymer.Type: ApplicationFiled: March 24, 2011Publication date: July 14, 2011Applicant: ASAHI GLASS COMPANY, LIMITEDInventors: Takashi Nakano, Tomoyuki Fujita, Yoshitomi Morizawa
-
Patent number: 7973627Abstract: A solenoid actuator (1) attached to a hydraulic equipment comprises a shaft (5) connected to the hydraulic equipment, a plunger (4) fixed to the shaft (5), a coil (12) which magnetically drives the plunger (4), and a first bearing (7) and a second bearing (8) supporting the shaft (5) on both sides of the plunger (4). A plunger front chamber (74) is formed between the first bearing (7) and the plunger (4), a plunger rear chamber (75) is formed between the plunger (4) and the second bearing (8), and a second bearing rear chamber (76) is formed on the opposite side of the second bearing (8) to the plunger rear chamber (75). To secure an oil flow between these chambers, a plunger exterior oil passage (63), a second bearing oil passage (64), and a shaft-penetrating oil passage (65) are provided, thereby realizing a preferable balance between oil pressures acting on the second bearing (8).Type: GrantFiled: November 5, 2009Date of Patent: July 5, 2011Assignee: Kayaba Industry Co., Ltd.Inventors: Hideki Yamagata, Mamoru Hosogai, Hideki Tsuchiya, Yoshiharu Miya, Tomoyuki Fujita, Koichiro Akatsuka, Kenji Yazaki
-
Publication number: 20110074842Abstract: An ink refilling device including a supply portion to be connected to an ink cartridge and supply ink, an ink tank, a first connecting tube having one end connected to the ink tank, a three-way switching valve including an input end connected to the other end of the first connecting tube, a first output end and a second output end, and adapted to switch between a first flow path from the input end to the first output end and a second flow path from the input end to the second output end, a second connecting tube having one end connected to the first output end and the other end connected to the supply portion, a third connecting tube having one end connected to the second output end and the other end connected to the ink tank, and a feed pump provided along the first connecting tube to feed the ink.Type: ApplicationFiled: September 24, 2010Publication date: March 31, 2011Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventors: Takao Hyakudome, Goro Okada, Akira Nishio, Tomoyuki Fujita
-
Patent number: 7873169Abstract: Methods, devices and systems for generating a plurality of public keys from one private key with the same generator of a group are described. A public key cryptosystem is also disclosed for generating a plurality of anonymous public keys all of which relate to the same party used for secure communications. Those anonymous public keys are generated using the same generator from one single private key. With the invention, computation is reduced, memory can be saved and security level can be improved.Type: GrantFiled: November 9, 2005Date of Patent: January 18, 2011Assignee: NEC (China) Co., Ltd.Inventors: Ke Zeng, Tomoyuki Fujita
-
Patent number: 7841846Abstract: A vane pump according to the present invention is characterized in that a position of a first suction port located in the forward rotation direction of a rotor is brought closer to a suction port than a position of a second suction port located in the backward rotation direction of the rotor with the suction port as reference by positioning a side plate in the state where the discharge port is brought close to a mounting portion.Type: GrantFiled: February 24, 2009Date of Patent: November 30, 2010Assignee: Kayaba Industry Co., LtdInventors: Tomoyuki Fujita, Hiroshi Shiozaki, Tomomi Noda, Eishin Noguchi, Shinji Yakabe
-
Patent number: 7802973Abstract: A vane pump can effectively utilize the total quantity of a working fluid delivered from a vane section. The pump can be used for fluid pressure operated equipment requiring a high flow rate, does not create torque loss due to a throttle valve, and can prevent the occurrence of cavitation caused by a shortage of suction. The vane pump pressurizes and delivers a working fluid through a vane section. A returning working fluid flowing through a return port is throttled and accelerated by a throttle valve, and a working fluid sent from a suction port is attracted by the accelerated returning working fluid so that the returning working fluid and the working fluid sent from a tank are sent into the vane section.Type: GrantFiled: April 10, 2007Date of Patent: September 28, 2010Assignee: Kayaba Industry Co., Ltd.Inventors: Tomoyuki Fujita, Masamichi Sugihara
-
Publication number: 20100123535Abstract: A solenoid actuator (1) comprises a case (9) made of a magnetic material and housing a coil (12) wound on a bobbin (11), and a pressure tube (17) made of a non-magnetic material and fitted into a hollow portion of the bobbin (11). A base (2) and a sleeve (3) made of a magnetic material are disposed in the pressure tube (17). A plunger (4) provided in an operation chamber (74, 75) formed in the base (2) and the sleeve (3) strokes according to energization of the coil (12) to axially drive a shaft (5) fixed to the plunger (4). The pressure tube (17) ensures that magnetic flux is transferred between the case (9) and the sleeve (3) while preventing pressure variation in the operation chamber (74, 75) from being transmitted to the bobbin (11), thereby achieving a high response and a pressure tightness in the solenoid actuator (1).Type: ApplicationFiled: November 12, 2009Publication date: May 20, 2010Applicant: KAYABA INDUSTRY CO., LTD.Inventors: Hideki Yamagata, Mamoru Hosogai, Hideki Tsuchiya, Yoshiharu Miya, Tomoyuki Fujita, Ryuji Naide, Koichiro Akatsuka, Kenji Yazaki, Masato Ikeguchi
-
Publication number: 20100109825Abstract: A solenoid actuator (1) attached to a hydraulic equipment comprises a shaft (5) connected to the hydraulic equipment, a plunger (4) fixed to the shaft (5), a coil (12) which magnetically drives the plunger (4), and a first bearing (7) and a second bearing (8) supporting the shaft (5) on both sides of the plunger (4). A plunger front chamber (74) is formed between the first bearing (7) and the plunger (4), a plunger rear chamber (75) is formed between the plunger (4) and the second bearing (8), and a second bearing rear chamber (76) is formed on the opposite side of the second bearing (8) to the plunger rear chamber (75). To secure an oil flow between these chambers, a plunger exterior oil passage (63), a second bearing oil passage (64), and a shaft-penetrating oil passage (65) are provided, thereby realizing a preferable balance between oil pressures acting on the second bearing (8).Type: ApplicationFiled: November 5, 2009Publication date: May 6, 2010Applicant: KAYABA INDUSTRY CO., LTD.Inventors: Hideki Yamagata, Mamoru Hosogai, Hideki Tsuchiya, Yoshiharu Miya, Tomoyuki Fujita, Koichiro Akatsuka, Kenji Yazaki