Patents by Inventor Tatsuhito Aoyama
Tatsuhito Aoyama 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: 11067194Abstract: A combination valve includes a valve seat, a diaphragm valve element, a pilot system to automatically bring the diaphragm valve element into or out of contact with the valve seat by use of air pressure, and a manual system to hold the diaphragm valve element in contact with the valve seat even while air pressure is supplied. In the combination valve, a piston rod is provided such that, when the handle is turned to move the manual stem in a seating direction while the diaphragm valve element and the valve seat are separated from each other, the piston rod moves in the seating direction relative to a first piston and a second piston that are pushed by the air pressure in a separating direction.Type: GrantFiled: December 2, 2019Date of Patent: July 20, 2021Assignee: CKD CORPORATIONInventor: Tatsuhito Aoyama
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Patent number: 11002379Abstract: A manual valve provided with a valve body and a handle includes a lock mechanism to which a lock is attachable. The lock mechanism includes a movable member provided with first and second plate portions, and a support rod pivotally supporting the movable member. The movable member includes a mating hole engageable with only the handle placed in a fully-closed position. The movable member is guided along a guide hole through which the support rod is inserted to move between a locking position where the mating hole is engaged with the handle to lock the handle and an unlocking position where the mating hole is not engaged with the handle to allow rotation of the handle.Type: GrantFiled: December 3, 2019Date of Patent: May 11, 2021Assignee: CKD CORPORATIONInventor: Tatsuhito Aoyama
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Patent number: 10724644Abstract: A fluid control valve for controlling high-temperature fluid includes: a valve body including a valve chamber communicating with first and second flow passages, and a valve seat provided in the valve chamber; a metal diaphragm that contacts with and separates from the valve seat; a stem that moves the metal diaphragm up and down; and an actuator that drives the stem. The first flow passage includes a first orifice having a diameter set to 50% or less of a diameter of the second flow passage. Alternatively, the second flow passage includes a second orifice having a diameter set to 50% or less of the diameter of the second flow passage. The diameter of the second flow passage is calculated by converting a cylindrical flow passage area defined between the valve seat and the metal diaphragm when separated from the valve seat into a diameter of a circular flow passage.Type: GrantFiled: May 18, 2017Date of Patent: July 28, 2020Assignee: CKD CORPORATIONInventor: Tatsuhito Aoyama
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Publication number: 20200224787Abstract: A combination valve includes a valve seat, a diaphragm valve element, a pilot system to automatically bring the diaphragm valve element into or out of contact with the valve seat by use of air pressure, and a manual system to hold the diaphragm valve element in contact with the valve seat even while air pressure is supplied. In the combination valve, a piston rod is provided such that, when the handle is turned to move the manual stem in a seating direction while the diaphragm valve element and the valve seat are separated from each other, the piston rod moves in the seating direction relative to a first piston and a second piston that are pushed by the air pressure in a separating direction.Type: ApplicationFiled: December 2, 2019Publication date: July 16, 2020Applicant: CKD CORPORATIONInventor: Tatsuhito AOYAMA
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Publication number: 20200191299Abstract: A manual valve provided with a valve body and a handle includes a lock mechanism to which a lock is attachable. The lock mechanism includes a movable member provided with first and second plate portions, and a support rod pivotally supporting the movable member. The movable member includes a mating hole engageable with only the handle placed in a fully-closed position. The movable member is guided along a guide hole through which the support rod is inserted to move between a locking position where the mating hole is engaged with the handle to lock the handle and an unlocking position where the mating hole is not engaged with the handle to allow rotation of the handle.Type: ApplicationFiled: December 3, 2019Publication date: June 18, 2020Applicant: CKD CORPORATIONInventor: Tatsuhito AOYAMA
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Publication number: 20190128433Abstract: A fluid control valve for controlling high-temperature fluid includes: a valve body including a valve chamber communicating with first and second flow passages, and a valve seat provided in the valve chamber; a metal diaphragm that contacts with and separates from the valve seat; a stem that moves the metal diaphragm up and down; and an actuator that drives the stem. The first flow passage includes a first orifice having a diameter set to 50% or less of a diameter of the second flow passage. Alternatively, the second flow passage includes a second orifice having a diameter set to 50% or less of the diameter of the second flow passage. The diameter of the second flow passage is calculated by converting a cylindrical flow passage area defined between the valve seat and the metal diaphragm when separated from the valve seat into a diameter of a circular flow passage.Type: ApplicationFiled: May 18, 2017Publication date: May 2, 2019Applicant: CKD CORPORATIONInventor: Tatsuhito AOYAMA
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Publication number: 20180094740Abstract: A mounting structure of a solenoid valve for operation on a cylinder provided with an operation port, the solenoid valve being configured to control operation fluid to be supplied to the cylinder, includes a mounting block attached with the solenoid valve, and a mounting screw threadedly engaged with internal threads of the operation port to mount the mounting block on the cylinder. The mounting block includes an inlet passage for supplying the operation fluid to the solenoid valve, an outlet passage for flowing the operation fluid controlled by the solenoid valve, and a through hole through which the mounting screw is inserted and with which the outlet passage is communicated. The mounting screw includes an inner passage to communicate the operation port with the outlet passage. Seal members seal between an inner wall of the through hole and the mounting screw.Type: ApplicationFiled: January 27, 2017Publication date: April 5, 2018Applicant: CKD CORPORATIONInventor: Tatsuhito AOYAMA
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Patent number: 9885427Abstract: A manual opening/closing valve includes a manual handle, a valve element, a valve seat, an input port, and an output port. The manual opening/closing valve is arranged to move the valve element into contact with the valve seat when the manual handle is rotated, so that the valve is placed in a cutoff state in which communication between the input port and the output port is cut off, wherein the cutoff state includes a first cutoff state established when the manual handle is rotated to a first angle and a second cutoff state established when the manual handle is rotated to a second angle at which rotation operation force to the manual handle is converted to a cutoff load to be applied to the valve seat.Type: GrantFiled: May 15, 2015Date of Patent: February 6, 2018Assignee: CKD CORPORATIONInventor: Tatsuhito Aoyama
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Publication number: 20150354723Abstract: A manual opening/closing valve includes a manual handle, a valve element, a valve seat, an input port, and an output port. The manual opening/closing valve is arranged to move the valve element into contact with the valve seat when the manual handle is rotated, so that the valve is placed in a cutoff state in which communication between the input port and the output port is cut off, wherein the cutoff state includes a first cutoff state established when the manual handle is rotated to a first angle and a second cutoff state established when the manual handle is rotated to a second angle at which rotation operation force to the manual handle is converted to a cutoff load to be applied to the valve seat.Type: ApplicationFiled: May 15, 2015Publication date: December 10, 2015Inventor: Tatsuhito AOYAMA
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Patent number: 8960644Abstract: In a valve seat structure of a fluid control valve comprising a valve element, a body formed with an inlet port and an outlet port, and a valve seat member provided in the body, the fluid control valve being configured to bring the valve element into or out of contact with the valve seat member to control the flow of a fluid, the valve seat member is formed in a ring shape and includes a valve seat portion with which the valve element will come into our out of contact. Assuming that a thickness of the valve seat portion in a radial direction of the valve seat member is a first thickness t1 (0<t1), a second thickness t2 corresponding to a height of the valve seat member in a direction along an axis of the fluid control valve is determined in a range of 0.5 t1?t2?1.5 t1.Type: GrantFiled: October 13, 2011Date of Patent: February 24, 2015Assignee: CKD CorporationInventor: Tatsuhito Aoyama
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Publication number: 20120097881Abstract: In a valve seat structure of a fluid control valve comprising a valve element, a body formed with an inlet port and an outlet port, and a valve seat member provided in the body, the fluid control valve being configured to bring the valve element into or out of contact with the valve seat member to control the flow of a fluid, the valve seat member is formed in a ring shape and includes a valve seat portion with which the valve element will come into our out of contact. Assuming that a thickness of the valve seat portion in a radial direction of the valve seat member is a first thickness t1 (0<t1), a second thickness t2 corresponding to a height of the valve seat member in a direction along an axis of the fluid control valve is determined in a range of 0.5 t1?t2?1.5 t1.Type: ApplicationFiled: October 13, 2011Publication date: April 26, 2012Applicant: CKD CORPORATIONInventor: Tatsuhito AOYAMA
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Patent number: 7971599Abstract: To provide a low-cost air-operated valve, an air-operated valve comprises a piston, a cylinder in which the piston is allowed to slide by operation air, and a valve section to be driven by sliding movement of the piston. The cylinder includes an outer member having a hollow portion and an inner member loaded in the hollow portion of the outer member to define a piston chamber in which the piston is allowed to slide.Type: GrantFiled: May 21, 2007Date of Patent: July 5, 2011Assignee: CKD CorporationInventors: Tatsuhito Aoyama, Katsunori Hirose, Takashi Yajima, Tadaichi Hamada
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Publication number: 20080173834Abstract: An object of the present invention is to provide a malfunction prevention manual valve capable of preventing a malfunction while ensuring operability in opening and closing the valve. To achieve the object, a malfunction prevention manual valve 1 of the present invention includes a lock mechanism including a parallel pin 75 held against rotation relative to a housing 71, and a sub-handle 73 provided in a handle 72 in such a manner as to be engageable with the parallel pin 75. The parallel pin 75 or the sub-handle 73 is urged by a lock spring 77, bringing the sub-handle in engagement with the parallel pin 75 to restrain rotation of the handle 72. A malfunction prevention manual valve 2 of another aspect includes a lock mechanism including a spring pin 175 held against rotation relative to a housing 171, a cam groove 172a formed in a handle 172 to receive a spring pin 175, and a sub-handle 173 provided integral with the handle 172 and urged by a spring 177.Type: ApplicationFiled: April 13, 2005Publication date: July 24, 2008Applicant: CKD CORPORATIONInventors: Tatsuhito Aoyama, Takashi Yajima, Masayoshi Morimoto
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Publication number: 20070290154Abstract: To provide a low-cost air-operated valve, an air-operated valve comprises a piston, a cylinder in which the piston is allowed to slide by operation air, and a valve section to be driven by sliding movement of the piston. The cylinder includes an outer member having a hollow portion and an inner member loaded in the hollow portion of the outer member to define a piston chamber in which the piston is allowed to slide.Type: ApplicationFiled: May 21, 2007Publication date: December 20, 2007Applicant: CKD CORPORATIONInventors: Tatsuhito Aoyama, Katsunori Hirose, Takashi Yajima, Tadaichi Hamada
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Patent number: 5984318Abstract: To provide a gasket holder facilitating attachment and detachment of the gasket holder and capable of preventing positional shift and detachment of a gasket, a first gasket holding portion formed in a straight line and a second gasket holding portion formed in a curved line are provided to a gasket retainer, a gasket is held by three point support of a recess of the first gasket holding portion and recesses and of the second gasket holding portion, and bending portions and of the gasket retainer are bent and are held by stopper holes of a flow rate control valve block.Type: GrantFiled: June 24, 1997Date of Patent: November 16, 1999Assignee: CKD CorporationInventors: Akihiro Kojima, Tatsuhito Aoyama