Patents by Inventor Hisatoshi Akamoto
Hisatoshi Akamoto 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: 10352461Abstract: A valve device which improves the operability of a valve for opening and closing a flow path. The valve device includes a valve, an actuator, an actuator support member, an operating portion, and a threaded member wherein the valve is able to open and close a fluid path in a valve body having a fluid inflow passage and a fluid outflow passage. The actuator displaces the valve between an open position and a closed position. The actuator support member operatively supports the actuator so that the actuator is able to be driven. The operating portion drives the actuator. The threaded member is threadedly engaged with the actuator.Type: GrantFiled: March 23, 2016Date of Patent: July 16, 2019Assignee: Fujikin IncorporatedInventors: Hisatoshi Akamoto, Yuya Suzuki
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Publication number: 20180087677Abstract: A valve device which improves the operability of a valve for opening and closing a flow path. The valve device includes a valve, an actuator, an actuator support member, an operating portion, and a threaded member wherein the valve is able to open and close a fluid path in a valve body having a fluid inflow passage and a fluid outflow. The actuator displaces the valve between an open position and a closed position. The actuator support member operatively supports the actuator so that the actuator is able to be driven. The operating portion drives the actuator. The threaded member is threadedly engaged with the actuator.Type: ApplicationFiled: March 23, 2016Publication date: March 29, 2018Inventors: Hisatoshi Akamoto, Yuya Suzuki
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Patent number: 9822888Abstract: A diaphragm valve includes a valve body, a diaphragm, a bonnet, an operation mechanism, and a fixing mechanism. The fixing mechanism includes a clamping member for integrally sandwiching and fixing, from both right and left sides, circumferential edges of both the bonnet and the valve body. A circular pressing member for pressing a circumferential edge of the diaphragm from above is interposed between the diaphragm and the bonnet and has convex portions and concave portions. The convex portions fit into notches provided at the circumferential edge of the diaphragm or the valve body, and the concave portions are fitted by protrusions provided at the circumferential edge of the diaphragm or the valve body.Type: GrantFiled: September 6, 2013Date of Patent: November 21, 2017Assignee: Kabushiki Kaisha FujikinInventors: Hisatoshi Akamoto, Izuru Shikata, Ryutaro Tanno
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Patent number: 9803776Abstract: Provided are a valve device free of changes in the position of the valve member caused by external force and fluid pressure, and a lock device for the valve device. The lock device has a tubular member fitted to the rotating part of the valve device so that the member is movable along the axis of the rotating part in both directions, wherein the member has a protrusion on its inner circumferential face along its axis, and the protrusion engages with or disengages from recesses in an outer circumferential face of a holder of the rotating part formed along its axis when the member moves in either direction; or the member has recesses in its inner circumferential face formed along its axis, and the recesses engage with or disengage from a protrusion on the outer circumferential face of the holder along its axis when the member moves in either direction.Type: GrantFiled: April 11, 2014Date of Patent: October 31, 2017Assignee: Fujikin IncorporatedInventors: Hisatoshi Akamoto, Izuru Shikata, Ryutaro Tanno
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Patent number: 9404592Abstract: A diaphragm valve which can solve problems of a disc-shaped diaphragm, wherein the amount of deformation is significant and dust is liable to be generated, that the change in volume in opening and closing of the fluid channel is significant, and that a pressure receiving surface area of the diaphragm at the time of channel closure is provided. A diaphragm is formed of a synthetic resin and, a cylindrical portion fixedly fitted on a valve rod, a bottom wall portion closing a lower end opening of the cylindrical portion, a flange portion provided at an upper end portion of the cylindrical portion, and a projecting portion provided at a center portion of the bottom wall portion and facing an upper end opening of a fluid inlet passage. A vertical cross-sectional shape of an axially intermediate portion of the cylindrical portion is formed into a substantially arcuate shape projecting radially outward.Type: GrantFiled: May 29, 2013Date of Patent: August 2, 2016Assignee: FUJIKIN INCORPORATEDInventors: Hisatoshi Akamoto, Makoto Abe, Kunio Ueda
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Publication number: 20160091111Abstract: Provided are a valve device free of changes in the position of the valve member caused by external force and fluid pressure, and a lock device for the valve device. The lock device has a tubular member fitted to the rotating part of the valve device so that the member is movable along the axis of the rotating part in both directions, wherein the member has a protrusion on its inner circumferential face along its axis, and the protrusion engages with or disengages from recesses in an outer circumferential face of a holder of the rotating part formed along its axis when the member moves in either direction; or the member has recesses in its inner circumferential face formed along its axis, and the recesses engage with or disengage from a protrusion on the outer circumferential face of the holder along its axis when the member moves in either direction.Type: ApplicationFiled: April 11, 2014Publication date: March 31, 2016Inventors: Hisatoshi Akamoto, Izuru Shikata, Ryutaro Tanno
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Publication number: 20150144822Abstract: A diaphragm valve includes a valve body, a diaphragm, a bonnet, an operation mechanism, and a fixing mechanism. The fixing mechanism includes a clamping member for integrally sandwiching and fixing, from both right and left sides, circumferential edges of both the bonnet and the valve body. A circular pressing member for pressing a circumferential edge of the diaphragm from above is interposed between the diaphragm and the bonnet and has convex portions and concave portions. The convex portions fit into notches provided at the circumferential edge of the diaphragm or the valve body, and the concave portions are fitted by protrusions provided at the circumferential edge of the diaphragm or the valve body.Type: ApplicationFiled: September 6, 2013Publication date: May 28, 2015Applicant: Kabushiki Kaisha FujikinInventors: Hisatoshi Akamoto, Izuru Shikata, Ryutaro Tanno
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Publication number: 20150115191Abstract: A diaphragm valve which can solve problems of a disc-shaped diaphragm, wherein the amount of deformation is significant and dust is liable to be generated, that the change in volume in opening and closing of the fluid channel is significant, and that a pressure receiving surface area of the diaphragm at the time of channel closure is provided. A diaphragm is formed of a synthetic resin and, a cylindrical portion fixedly fitted on a valve rod, a bottom wall portion closing a lower end opening of the cylindrical portion, a flange portion provided at an upper end portion of the cylindrical portion, and a projecting portion provided at a center portion of the bottom wall portion and facing an upper end opening of a fluid inlet passage. A vertical cross-sectional shape of an axially intermediate portion of the cylindrical portion is formed into a substantially arcuate shape projecting radially outward.Type: ApplicationFiled: May 29, 2013Publication date: April 30, 2015Applicant: FUJIKIN INCORPORATEDInventors: Hisatoshi Akamoto, Makoto Abe, Kunio Ueda
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Publication number: 20080302985Abstract: To provide a handle with a torque limiter capable of performing the opening/closing operation of a flow passage with a specified tightening force, less causing wear and damage to a valve element even if repeatedly used, capable of stably controlling a flow rate over a long period, capable of securely performing the opening of the flow passage, and manufacturable at low cast and a fluid controller having the handle with the torque limiter. This handle with the torque limiter comprises a handle body (62) connected to an operating mechanism (5) vertically moving the valve element by a rotating operation and a cover body (61) fitted to the handle body. The handle body comprises a ratchet wheel (7), and the cover body comprises a ratchet claw (8) rotatable about a pivot shaft (81) and a spring (9) energizing a force to rotate the ratchet claw in a direction for engaging the ratchet claw with the outer peripheral teeth for the ratchet wheel.Type: ApplicationFiled: September 27, 2005Publication date: December 11, 2008Inventors: Kunihiko Daido, Hisatoshi Akamoto
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Publication number: 20060152001Abstract: A specified metal member included among the components of a valve, coupling or like fluid handling part for use in piping and fluid control devices is made of an alloy comprising, in % by weight, 0.001 to 0.01% of C, up to 5% of Si, up to 2% of Mn, up to 0.03% of P, up to 100 ppm of S, up to 50 ppm of O, 18 to 25% of Cr, 15 to 25% of Ni, 4.5 to 7.0% of Mo, 0.5 to 3.0% of Cu, 0.1 to 0.3% of N, and the balance substantially Fe and other inevitable impurities, the alloy having a CRI (crevice corrosion resistance index) value in the range of 40?CRI?55, as determined from the expression CRI=[Cr]+4×[Mo]+30×[N] wherein the amount of alloy components present in combination in the alloy to ensure crevice corrosion resistance are expressed in % by weight.Type: ApplicationFiled: July 9, 2003Publication date: July 13, 2006Inventors: Ryo Matsuhashi, Kazuhiro Suetsugu, Hideyuki Miyagawa, Toshio Kita, Kyota Sogabe, Kazuhiro Yoshikawa, Akihiro Morimoto, Jyunji Sato, Kunihiko Daido, Hisatoshi Akamoto, Yoshiki Kimura
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Patent number: 6752376Abstract: A flow controller (1), comprising a valve body (4) having flow paths forming an inlet and an outlet of fluid, a diaphragm (6) held fixedly between the valve body and a bonnet (5), and an operating mechanism (7) moving the diaphragm vertically, wherein the valve body flow paths communicate with each other through a projection-free communication path (8), the a diaphragm is formed so that, when lowering, it comes into close contact with the communication path so that it closes the flow path and, when rising, the center part thereof is recessed so that an area near the outer peripheral part is raised, and a curved surface (52), to which the outer upper surface (63) of the raised part is closely fitted, is formed on a bonnet on the inner lower surface of a diaphragm holding part (51).Type: GrantFiled: November 12, 2002Date of Patent: June 22, 2004Assignee: Kabushiki Kaisha FujikinInventors: Jyunji Satou, Hisatoshi Akamoto, Makoto Iwata
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Patent number: 6505814Abstract: A fluid controller (1), having a valve body (4) having flow paths used as inlet and outlet for a bonnet (5), and an operating mechanism (7) moving the diaphragm in vertical direction, wherein the flow paths of the valve body communicates with each other through a protrusion-free communication path (8), the diaphragm is fitted closely to the communication path when lowered so as to close the flow path and, when raised, the center part of the diaphragm is recessed and its part near the outer periphery part is protruded, and also a curved surface (52) to which the outer upper surface (63) of the protruded part is closely fitted is formed on the bonnet at the inner lower surface of a diaphragm holding part (51).Type: GrantFiled: April 12, 2001Date of Patent: January 14, 2003Assignee: Kabushiki Kaisha FujikinInventors: Jyunji Satou, Hisatoshi Akamoto, Makoto Iwata