Patents by Inventor Shigeru Itoi

Shigeru Itoi 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: 8256115
    Abstract: Each of ridges 7 on respective opposite side surfaces of a gasket 4 has a trapezoidal cross sectional shape defined by an outer tapered face 7a providing an outer peripheral surface, an inner tapered face 7b providing an inner peripheral surface and a flat face 7c providing a top end surface. The hardness of the gasket 4, the angle between the tapered faces 7a, 7b of the ridge 7, the height of the ridge 7 and the area of the flat top end face 7c of the ridge are so determined that the value of thrust for tightening up the coupling is between a predetermined minimum value and a predetermined maximum value.
    Type: Grant
    Filed: June 26, 2008
    Date of Patent: September 4, 2012
    Assignee: Fujikin Incorporated
    Inventors: Shigeru Itoi, Michio Yamaji, Tsutomu Shinohara, Kenji Tsubota, Tadanobu Yoshida, Susumu Ozawa
  • Patent number: 8083267
    Abstract: Each of ridges 7 on respective opposite side surfaces of a gasket 4 has a trapezoidal cross sectional shape defined by an outer tapered face 7a providing an outer peripheral surface, an inner tapered face 7b providing an inner peripheral surface and a flat face 7c providing a top end surface. The hardness of the gasket 4, the angle between the tapered faces 7a, 7b of the ridge 7, the height of the ridge 7 and the area of the flat top end face 7c of the ridge are so determined that the value of thrust for tightening up the coupling is between a predetermined minimum value and a predetermined maximum value.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: December 27, 2011
    Assignee: Fujikin Incorporated
    Inventors: Shigeru Itoi, Michio Yamaji, Tsutomu Shinohara, Kenji Tsubota, Tadanobu Yoshida, Susumu Ozawa
  • Patent number: 7802771
    Abstract: A fluid control device 71 includes a working member 75 in automatic opening and closing, which is moved vertically by introduction or discharge of compressed fluid to or from a compressed fluid inlet chamber 90 formed in a casing 73 to move a valve element holder 5 to an opening position against bias force of a compression coil spring 77, and an working member 74 in manual opening and closing, which is moved vertically by a manual operation and directly presses the valve element holder 5 downward when it is moved downward.
    Type: Grant
    Filed: November 30, 2004
    Date of Patent: September 28, 2010
    Assignee: Fujikin Incorporated
    Inventors: Kenji Tsubota, Michio Yamaji, Shigeru Itoi, Tsutomu Shinohara, Ichiro Tokuda
  • Publication number: 20090015010
    Abstract: Each of ridges 7 on respective opposite side surfaces of a gasket 4 has a trapezoidal cross sectional shape defined by an outer tapered face 7a providing an outer peripheral surface, an inner tapered face 7b providing an inner peripheral surface and a flat face 7c providing a top end surface. The hardness of the gasket 4, the angle between the tapered faces 7a, 7b of the ridge 7, the height of the ridge 7 and the area of the flat top end face 7c of the ridge are so determined that the value of thrust for tightening up the coupling is between a predetermined minimum value and a predetermined maximum value.
    Type: Application
    Filed: June 26, 2008
    Publication date: January 15, 2009
    Applicant: FUJIKIN INCORPORATED
    Inventors: Shigeru Itoi, Michio Yamaji, Tsutomu Shinohara, Kenji Tsubota, Tadanobu Yoshida, Susumu Ozawa
  • Patent number: 7175157
    Abstract: A fluid controller, wherein the recessed port (25) of a body (22) is formed of larger diameter part (25a) near an opening and a small diameter part (25c) continued to the lower part of the large diameter part (25a) through a step part (25b). A flow passage forming disk (26) is fitted to the recessed portion (25). The fluid passage forming disk (26) comprises a large diameter cylindrical part (31) fitted to the large diameter part (25a) in the recessed portion, a connection part (32) supported by the step part (25b) in the recessed portion, and a small diameter cylindrical part (33) having an outer diameter smaller than the inner diameter of the small diameter part (25c) in the recessed portion and having a lower end supported by the bottom surface of the recessed portion (25).
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: February 13, 2007
    Assignee: Fujikin Incorporated
    Inventors: Tsuyoshi Tanikawa, Shigeru Itoi, Tadayuki Yakushijin
  • Publication number: 20060214130
    Abstract: A fluid controller, wherein the recessed port (25) of a body (22) is formed of larger diameter part (25a) near an opening and a small diameter part (25c) continued to the lower part of the large diameter part (25a) through a step part (25b). A flow passage forming disk (26) is fitted to the recessed portion (25). The fluid passage forming disk (26) comprises a large diameter cylindrical part (31) fitted to the large diameter part (25a) in the recessed portion, a connection part (32) supported by the step part (25b) in the recessed portion, and a small diameter cylindrical part (33) having an outer diameter smaller than the inner diameter of the small diameter part (25c) in the recessed portion and having a lower end supported by the bottom surface of the recessed portion (25).
    Type: Application
    Filed: December 7, 2004
    Publication date: September 28, 2006
    Applicant: FUJIKIN INCORPORATED
    Inventors: Tsuyoshi Tanikawa, Shigeru Itoi, Tadayuki Yakushijin
  • Publication number: 20060175563
    Abstract: A fluid control device 71 includes a working member 75 in automatic opening and closing, which is moved vertically by introduction or discharge of compressed fluid to or from a compressed fluid inlet chamber 90 formed in a casing 73 to move a valve element holder 5 to an opening position against bias force of a compression coil spring 77, and an working member 74 in manual opening and closing, which is moved vertically by a manual operation and directly presses the valve element holder 5 downward when it is moved downward.
    Type: Application
    Filed: November 30, 2004
    Publication date: August 10, 2006
    Inventors: Kenji Tsubota, Michio Yamaji, Shigeru Itoi, Tsutomu Shinohara, Ichiro Tokuda
  • Publication number: 20060055122
    Abstract: Each of ridges 7 on respective opposite side surfaces of a gasket 4 has a trapezoidal cross sectional shape defined by an outer tapered face 7a providing an outer peripheral surface, an inner tapered face 7b providing an inner peripheral surface and a flat face 7c providing a top end surface.
    Type: Application
    Filed: October 31, 2003
    Publication date: March 16, 2006
    Applicant: Fujikin Incorporated
    Inventors: Shigeru Itoi, Michio Yamaji, Tsutomu Shinohara, Kenji Tsubota, Tadanobu Yoshida, Susumu Ozawa
  • Patent number: 7004199
    Abstract: Line interconnecting means interconnecting two lines adjacent to each other laterally thereof comprises a lateral projection 64b formed on a two-way connecting block coupling 64 of the first of the lines, a recessed portion 54c formed in a two-way connecting block coupling 64 of the second of the lines for the lateral projection 64b to fit in, a coupling branch channel 82 formed in the block coupling 64 provided with the lateral projection, a first valve body branch channel 90A formed in the body 54a of a shut-off valve 54 of the first line for always causing a main channel 89 in the valve body to communicate with the coupling body upper surface opening 82a of the coupling branch channel 82, and a second valve body branch channel 90B formed in the body 54a of a shut-off valve 54 of the second line for always causing a main channel 89 in the valve body to communicate with a lateral projection upper surface opening of the coupling branch channel 82.
    Type: Grant
    Filed: August 4, 2004
    Date of Patent: February 28, 2006
    Assignee: Fujikin Incorporated
    Inventors: Warner F. Funes, Gregory W. Ochs, Shigeru Itoi
  • Publication number: 20060027274
    Abstract: Line interconnecting means interconnecting two lines adjacent to each other laterally thereof comprises a lateral projection 64b formed on a two-way connecting block coupling 64 of the first of the lines, a recessed portion 54c formed in a two-way connecting block coupling 64 of the second of the lines for the lateral projection 64b to fit in, a coupling branch channel 82 formed in the block coupling 64 provided with the lateral projection, a first valve body branch channel 90A formed in the body 54a of a shut-off valve 54 of the first line for always causing a main channel 89 in the valve body to communicate with the coupling body upper surface opening 82a of the coupling branch channel 82, and a second valve body branch channel 90B formed in the body 54a of a shut-off valve 54 of the second line for always causing a main channel 89 in the valve body to communicate with a lateral projection upper surface opening of the coupling branch channel 82.
    Type: Application
    Filed: August 4, 2004
    Publication date: February 9, 2006
    Inventors: Warner Funes, Gregory Ochs, Shigeru Itoi
  • Patent number: 6779774
    Abstract: A metal diaphragm valve for use inter alia in semiconductor facilities. This metal diaphragm valve is so designed as to reduce the fluid resistance of the fluid path from the valve chamber to the outflow path of the body and allows a large quantity of fluid to flow in spite of its small size. The metal diaphragm valve of the present invention comprises a body 2 provided with an inflow path 6, a valve chamber 8 and an outflow path 7 and a metal diaphragm 3, driving means 4 and a ring-shaped groove 5, wherein the diameter D of the inflow path 6 is larger than the width W of the ring-shaped groove 5 and the effective cross-sectional area of the regions where the ring-shaped groove 5 and the effective cross-sectional area of the regions where the ring-shaped groove 5 and the outflow path 7 intersect one another is larger than the transverse cross-sectional area of the outflow path 7.
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: August 24, 2004
    Assignee: Fujikin Incorporated
    Inventor: Shigeru Itoi
  • Publication number: 20040094740
    Abstract: A metal diaphragm valve used for a semiconductor manufacturing device allowing a large amount of flow to pass therein in spite of a compact size by reducing a fluid resistance of a flow passage ranging from a valve chamber to an outflow passage through an inflow passage in a valve body, comprising the body (2) having the inflow passage (6), the valve chamber (8), and the outflow passage (7), a metal diaphragm (3), a drive means (4), and an annular groove (5), characterized in that the diameter (D) of the outflow passage (6) is made larger than the groove width (W) of the annular groove (5), and the effective sectional area of the crossing portion of the annular groove (5) with the outflow passage (6) is made larger than the cross-sectional area of the outflow passage (6).
    Type: Application
    Filed: November 22, 2002
    Publication date: May 20, 2004
    Inventor: Shigeru Itoi
  • Patent number: 6453707
    Abstract: A locking device comprises a stopper support fixed to the body of a fluid controller, and a stopper nonrotatably mounted on the stopper support and engageable with a channel opening-closing handle for preventing the rotation of the handle. The stopper mounted on the support is movable upward and downward between a locking position wherein the stopper engages with the handle and an unlocking position wherein the stopper is out of engagement with the handle. The stopper support is formed with an opening for fitting the controller body therein and an aperture for fitting the stopper therein. The stopper has a vertical portion slidably fitted in the aperture and formed with a lock attaching bore.
    Type: Grant
    Filed: January 2, 2001
    Date of Patent: September 24, 2002
    Assignee: Fujikin Incorporated
    Inventors: Ryutaro Nishimura, Shigeru Itoi
  • Patent number: 6361081
    Abstract: Bolt bores in lower members each comprise a large-diameter portion larger than the head of a bolt in diameter, and a small diameter portion extending downward from the large-diameter portion with a stepped portion formed therebetween and having a diameter intermediate between the diameter of the bolt head and the diameter of the shank of the bolt. A heat insulator has a spacer inserting hole. A hollow cylindrical spacer having an inside diameter larger than the diameter of the bolt shank is inserted through the small-diameter portion of the bolt bore and the spacer inserting hole so that the upper end of the spacer is positioned in the large-diameter portion. The spacer has a lower end bearing on a support member. A hollow cylindrical elastic member is interposed between the bolt head and the stepped portion for biasing the lower member toward the support member.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: March 26, 2002
    Assignee: Fujikin Incorporated
    Inventors: Kosuke Yokoyama, Tsutomu Shinohara, Shigeru Itoi, Michio Yamaji, Tetsuya Kojima
  • Publication number: 20010000850
    Abstract: A locking device comprises a stopper support fixed to the body of a fluid controller, and a stopper nonrotatably mounted on the stopper support and engageable with a channel opening-closing handle for preventing the rotation of the handle. The stopper mounted on the support is movable upward and downward between a locking position wherein the stopper engages with the handle and an unlocking position wherein the stopper is out of engagement with the handle. The stopper support is formed with an opening for fitting the controller body therein and an aperture for fitting the stopper therein. The stopper has a vertical portion slidably fitted in the aperture and formed with a lock attaching bore.
    Type: Application
    Filed: January 2, 2001
    Publication date: May 10, 2001
    Applicant: FUJIKIN INCORPORATED
    Inventors: Ryutaro Nishimura, Shigeru Itoi
  • Patent number: 6189350
    Abstract: A locking device comprises a stopper support fixed to the body of a fluid controller, and a stopper nonrotatably mounted on the stopper support and engageable with a channel opening-closing handle for preventing the rotation of the handle. The stopper mounted on the support is movable upward and downward between a locking position wherein the stopper engages with the handle and an unlocking position wherein the stopper is out of engagement with the handle. The stopper support is formed with an opening for fitting the controller body therein and an aperture for fitting the stopper therein. The stopper has a vertical portion slidably fitted in the aperture and formed with a lock attaching bore.
    Type: Grant
    Filed: April 20, 1998
    Date of Patent: February 20, 2001
    Assignee: Fujikin Incorporated
    Inventors: Ryutaro Nishimura, Shigeru Itoi
  • Patent number: 6135155
    Abstract: A regulator for regulating a flow rate is provided with an upper connector having a downwardly opened channel in communication with the regulator. An on-off valve connected to the regulator is provided with a lower connector having an upwardly opened channel in communication with the on-off valve. The upper connector is lapped over the lower connector and removably joined thereto with a screw so as to cause the downwardly opened channel to communicate with the upwardly opened channel. Accordingly, the regulator can be removed singly, for example, when malfunctioning.
    Type: Grant
    Filed: May 29, 1996
    Date of Patent: October 24, 2000
    Assignee: Fujikin Incorporated
    Inventors: Tadahiro Ohmi, Michio Yamaji, Hiroshi Morokoshi, Shigeru Itoi, Nobukazu Ikeda, Tetsuya Kojima
  • Patent number: 6039360
    Abstract: A coupling comprises a holding member having a U-shaped cross section, and a channel member held by the holding member. The holding member has an upper wall formed with screw bores for use in attaching the holding member to a fluid controller. The channel member comprises a body having an inner channel and fitted in a space between the upper wall of the holding member and a lower wall thereof, a tubular upward projection communicating with the inner channel of the body and having an upper end inserted in a through bore in the upper wall of the holding member to communicate with a downward channel of the fluid controller, and a tubular lateral projection communicating with the inner channel of the body and extending laterally. The upper end of the channel member has an outward flange, and the through bore of the upper wall of the holding member has an inward flange for supporting the flange.
    Type: Grant
    Filed: May 6, 1998
    Date of Patent: March 21, 2000
    Assignees: Tadahiro Ohmi, Fujikin Incorporated
    Inventors: Tadahiro Ohmi, Michio Yamaji, Tsutomu Shinohara, Shigeru Itoi, Keiji Hirao, Yuji Kawano, Shigeaki Tanaka, Kosuke Yokoyama, Hiroshi Morokoshi, Nobukazu Ikeda
  • Patent number: 5983933
    Abstract: A valve mount having two valves removably installed thereon from above as arranged in a direction comprises an inflow channel forming member having a channel in communication with an inlet of the valve disposed at one end thereof, a communication channel forming member having a channel for causing an outlet of the valve at the end to communicate with an inlet of the other valve adjacent thereto, an outflow channel forming member having a channel in communication with an outlet of the other valve, and a subchannel forming member having a channel in communication with an inlet-outlet port formed in the other valve.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: November 16, 1999
    Assignees: Tadahiro Ohmi, Fujikin Inc.
    Inventors: Tadahiro Ohmi, Yuji Kawano, Keiji Hirao, Hisashi Tanaka, Naoya Masuda, Yukio Minami, Masayuki Hatano, Shigeaki Tanaka, Michio Yamaji, Hiroshi Morokoshi, Michio Kuramochi, Nobukazu Ikeda, Shigeru Itoi, Michihiro Kashiwa
  • Patent number: D513307
    Type: Grant
    Filed: August 25, 2004
    Date of Patent: December 27, 2005
    Assignee: Fujikin Incorporated
    Inventors: Warner F. Funes, Gregory W. Ochs, Shigeru Itoi