Patents by Inventor Yuzuru Okita
Yuzuru Okita 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: 11408537Abstract: In a fluid control valve, a cylinder chamber includes a first pilot chamber extending from a piston in one of sliding directions. An opening of a first pilot port allowing supply and discharge of fluid is formed in the inner wall of the first pilot chamber. The fluid is accommodated in the first pilot chamber when the piston is in a valve open position, and discharged via the opening when the piston is displaced toward a valve closed position. At least one of the piston and a valve body includes a throttle portion forming, between the piston and the valve body, a throttle path having a cross-sectional area smaller than the area of the opening, after the piston starts being displaced from the valve open position toward the valve closed position.Type: GrantFiled: March 18, 2020Date of Patent: August 9, 2022Assignee: SMC CORPORATIONInventors: Yoshitada Doi, Yuzuru Okita, Yoji Niimi, Hirofumi Ueda, Tsugumichi Fujiwara
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Patent number: 11280421Abstract: In a fluorine resin molded body employed in a fluid device and including a ring-shaped seal section, the seal section is configured from a projection and a backup section that are aligned in a direction in which the seal section receives a compressive load when the fluorine resin molded body is installed in the fluid device.Type: GrantFiled: July 1, 2020Date of Patent: March 22, 2022Assignee: SMC CORPORATIONInventors: Yoshitada Doi, Yuzuru Okita, Keisuke Ikeda
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Patent number: 11193607Abstract: In a fluid control valve, a cylinder chamber includes a first pilot chamber extending from a piston in one of sliding directions. An opening of a first pilot port allowing supply and discharge of fluid is formed in the inner wall of the first pilot chamber. The fluid is accommodated in the first pilot chamber when the piston is in a valve open position, and discharged via the opening when the piston is displaced toward a valve closed position. At least one of the piston and a valve body includes a throttle portion forming, between the piston and the valve body, a throttle path having a cross-sectional area smaller than the area of the opening, after the piston starts being displaced from the valve open position toward the valve closed position.Type: GrantFiled: March 18, 2020Date of Patent: December 7, 2021Assignee: SMC CORPORATIONInventors: Yoshitada Doi, Yuzuru Okita, Yoji Niimi, Hirofumi Ueda, Tsugumichi Fujiwara
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Patent number: 11174972Abstract: A pipe joint includes a joint body formed with a through hole therein along an axial direction, and having male threads and an extending shaft portion formed on one end side thereof; and a nut member formed with an insertion hole through which a tube member is inserted, and having female threads formed therein that screw-engage with the male threads. Annular projections are formed on an outer circumferential surface of the extending shaft portion, and the tube member, which is expanded in diameter, is gripped between the annular projections and an inner circumferential surface of the nut member.Type: GrantFiled: January 22, 2020Date of Patent: November 16, 2021Assignee: SMC CorporationInventors: Yuzuru Okita, Keisuke Ikeda
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Patent number: 10989317Abstract: A two-way valve configured to switch between a communication state and a non-communication state of between a primary port and a secondary port includes a valve body having the primary port and the secondary port and containing a valve seat portion therein, a diaphragm valve supported inside the valve body so as to be brought into contact with and separated from the valve seat portion, and a drive mechanism configured to displace the diaphragm valve. The diaphragm valve includes an annular projection facing a flat seat surface of the valve seat portion and an elastic member attached at the back of the annular projection.Type: GrantFiled: August 19, 2019Date of Patent: April 27, 2021Assignee: SMC CorporationInventors: Yoshitada Doi, Yuzuru Okita, Takamitsu Suzuki, Akinori Nagata
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Publication number: 20210095801Abstract: A fitting nut made of a resin material includes: a hollow, large-diameter tube portion having a female thread formed on its inner peripheral wall; and a small-diameter tube portion that is continuous to the large-diameter tube portion and having a hollow cylindrical shape with a smaller diameter than the large-diameter tube portion. The small-diameter tube portion includes, in the outer peripheral wall thereof, a plurality of engagement grooves that are depressed inwardly in the diameter direction of the small-diameter tube portion and extend along the longitudinal direction that is orthogonal to the diameter direction.Type: ApplicationFiled: September 21, 2020Publication date: April 1, 2021Applicant: SMC CORPORATIONInventors: Yoshitada DOI, Yuzuru OKITA, Yoji NIIMI, Hirofumi UEDA, Tsugumichi FUJIWARA
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Publication number: 20210003228Abstract: In a fluorine resin molded body employed in a fluid device and including a ring-shaped seal section, the seal section is configured from a projection and a backup section that are aligned in a direction in which the seal section receives a compressive load when the fluorine resin molded body is installed in the fluid device.Type: ApplicationFiled: July 1, 2020Publication date: January 7, 2021Applicant: SMC CORPORATIONInventors: Yoshitada DOI, Yuzuru Okita, Keisuke Ikeda
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Publication number: 20200300383Abstract: In a fluid control valve, a cylinder chamber includes a first pilot chamber extending from a piston in one of sliding directions. An opening of a first pilot port allowing supply and discharge of fluid is formed in the inner wall of the first pilot chamber. The fluid is accommodated in the first pilot chamber when the piston is in a valve open position, and discharged via the opening when the piston is displaced toward a valve closed position. At least one of the piston and a valve body includes a throttle portion forming, between the piston and the valve body, a throttle path having a cross-sectional area smaller than the area of the opening, after the piston starts being displaced from the valve open position toward the valve closed position.Type: ApplicationFiled: March 18, 2020Publication date: September 24, 2020Applicant: SMC CorporationInventors: Yoshitada DOI, Yuzuru OKITA, Yoji NIIMI, Hirofumi UEDA, Tsugumichi FUJIWARA
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Publication number: 20200158272Abstract: A pipe joint includes a joint body formed with a through hole therein along an axial direction, and having male threads and an extending shaft portion formed on one end side thereof; and a nut member formed with an insertion hole through which a tube member is inserted, and having female threads formed therein that screw-engage with the male threads. Annular projections are formed on an outer circumferential surface of the extending shaft portion, and the tube member, which is expanded in diameter, is gripped between the annular projections and an inner circumferential surface of the nut member.Type: ApplicationFiled: January 22, 2020Publication date: May 21, 2020Applicant: SMC CorporationInventors: Yuzuru OKITA, Keisuke IKEDA
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Publication number: 20200063875Abstract: A two-way valve configured to switch between a communication state and a non-communication state of between a primary port and a secondary port includes a valve body having the primary port and the secondary port and containing a valve seat portion therein, a diaphragm valve supported inside the valve body so as to be brought into contact with and separated from the valve seat portion, and a drive mechanism configured to displace the diaphragm valve. The diaphragm valve includes an annular projection facing a flat seat surface of the valve seat portion and an elastic member attached at the back of the annular projection.Type: ApplicationFiled: August 19, 2019Publication date: February 27, 2020Applicant: SMC CorporationInventors: Yoshitada DOI, Yuzuru OKITA, Takamitsu SUZUKI, Akinori NAGATA
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Patent number: 9638345Abstract: A valve apparatus is equipped with a diaphragm disposed displaceably in the interior of a body, and which opens and closes a fluid passage by separating away from and being seated on a valve seat, a conductive shaft arranged in a through hole that is formed substantially in the center of the diaphragm, and a grounding member for grounding the conductive shaft. Each of the body and the diaphragm is formed from a non-conductive material, and one end surface of the conductive shaft is exposed to the fluid passage.Type: GrantFiled: July 22, 2014Date of Patent: May 2, 2017Assignee: SMC CORPORATIONInventors: Yuzuru Okita, Tetsuro Maruyama
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Publication number: 20160003391Abstract: A pipe joint includes a joint body formed with a through hole therein along an axial direction, and having male threads and an extending shaft portion formed on one end side thereof; and a nut member formed with an insertion hole through which a tube member is inserted, and having female threads formed therein that screw-engage with the male threads. Annular projections are formed on an outer circumferential surface of the extending shaft portion, and the tube member, which is expanded in diameter, is gripped between the annular projections and an inner circumferential surface of the nut member.Type: ApplicationFiled: May 6, 2015Publication date: January 7, 2016Applicant: SMC CorporationInventors: Yuzuru Okita, Keisuke Ikeda
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Publication number: 20150129791Abstract: A valve apparatus is equipped with a diaphragm disposed displaceably in the interior of a body, and which opens and closes a fluid passage by separating away from and being seated on a valve seat, a conductive shaft arranged in a through hole that is formed substantially in the center of the diaphragm, and a grounding member for grounding the conductive shaft. Each of the body and the diaphragm is formed from a non-conductive material, and one end surface of the conductive shaft is exposed to the fluid passage.Type: ApplicationFiled: July 22, 2014Publication date: May 14, 2015Applicant: SMC CorporationInventors: Yuzuru OKITA, Tetsuro Maruyama
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Patent number: 5779224Abstract: A two-way valve has a poppet valve displaceably disposed in a bonnet for selectively opening and closing a communication passage between primary and secondary ports, and a resilient member disposed in a diaphragm chamber defined between the bonnet and the poppet valve and resiliently deformable for dampening a load applied to a diaphragm of the poppet valve which is exposed to the communication passage.Type: GrantFiled: February 21, 1997Date of Patent: July 14, 1998Assignee: SMC Kabushiki KaishaInventors: Yoshihiro Fukano, Tetsuro Maruyama, Tadashi Uchino, Masaaki Ono, Yuzuru Okita