Patents by Inventor Katsumi Sahoda
Katsumi Sahoda 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: 7144650Abstract: A check valve is disposed in a hydrogen offgas circulation path which is connected to a fuel cell so as to flow the hydrogen offgas only in one direction. Inside a valve housing, a first compression chamber and a second compression chamber are provided such that a bulkhead is disposed therebetween. In the bulkhead 14, a first communication hole 18 and a second communication hole 19 are formed so as to communicate between the first compression chamber and the second compression chamber. In a first reed valve, an opening end is disposed upward and a fixed end is disposed downward. In a second reed valve, an opening end is disposed downward and a fixed end is disposed upward. By doing this, operability in the check valve after water has frozen can be improved.Type: GrantFiled: January 8, 2003Date of Patent: December 5, 2006Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Kazunori Fukuma, Kouji Miyano, Katsumi Sahoda
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Patent number: 7083874Abstract: A fuel cell power generation system comprises a hydrogen reservoir that can occlude non-used hydrogen discharged from a fuel cell, and release the same. The hydrogen reservoir has a first storage section comprising an easily hydrogen occluding first hydrogen occlusion material, and a second storage section comprising an easily hydrogen releasing second hydrogen occlusion material. The non-used hydrogen from the fuel cell is once occluded in the first storage section, then the hydrogen obtained by releasing the occluded hydrogen is transferred to and occluded by the second storage section. When the fuel cell starts up, the occluded hydrogen is released from the second storage section, and supplied to the fuel cell.Type: GrantFiled: January 26, 2001Date of Patent: August 1, 2006Assignee: Honda Giken Kogyo Kabushiki KaishaInventor: Katsumi Sahoda
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Publication number: 20060163513Abstract: A solenoid-operated cutoff valve for use with fuel cells has a movable member disposed in a guide housing for displacement upon energization of a solenoid. When the movable member is displaced, a pilot valve is unseated from a pilot valve seat. A fluid in a communication chamber flows through a pilot passage into an output port. The communication chamber is divided into a first communication chamber and a second communication chamber by a diaphragm. Under a pressure difference developed between the first communication chamber and the second communication chamber, a main valve of a valve head is unseated from a valve seat of a valve housing, opening the solenoid-operated cutoff valve.Type: ApplicationFiled: November 30, 2005Publication date: July 27, 2006Applicant: Keihin CorporationInventors: Kazuki Ishikawa, Yoshio Saito, Toshiaki Kamo, Katsumi Sahoda, Osamu Ichikawa, Kouji Miyano, Tatsuya Sugawara
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Publication number: 20060151734Abstract: A diaphragm is clamped between a solenoid unit disposed in a casing and a second valve body in which hydrogen is introduced. A filter comprising a bottomed cylindrical mesh member is mounted in a first passage defined in the first valve body. A restriction having an orifice for restricting the flow rate of hydrogen supplied to first and second communication chambers is mounted in a first port that is disposed upstream of the filter. The restriction and the filter are disposed coaxially in line with each other.Type: ApplicationFiled: March 7, 2006Publication date: July 13, 2006Applicant: Keihin CorporationInventors: Kouji Sonoda, Masakazu Murai, Kouetsu Hikichi, Hideki Sasaki, Yoshio Saito, Koji Katano, Kazunori Fukuma, Hiroyasu Ozaki, Kouji Miyano, Katsumi Sahoda
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Publication number: 20060127722Abstract: A regulator for use with fuel cells, which is mounted in a pressure controller of a fuel cell system, has a first diaphragm flexible under the pressure of pilot air supplied as an oxidizing agent to a pilot chamber, a second diaphragm flexible under the pressure of a hydrogen-containing gas flowing through a fluid passage, and a rod connected to a valve head. The spring force of a first spring is set to a value greater than the spring force of a second spring. The regulator is of a normally closed type in which the valve head is seated on a valve seat when the pilot air is not supplied to the pilot chamber.Type: ApplicationFiled: December 1, 2003Publication date: June 15, 2006Applicant: Keihin CorporationInventors: Yoji Nakajima, Kazuki Ishikawa, Takashi Yoshida, Katsumi Sahoda, Kouji Miyano
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Patent number: 7040596Abstract: A diaphragm is clamped between a solenoid unit disposed in a casing and a second valve body in which hydrogen is introduced. A filter comprising a bottomed cylindrical mesh member is mounted in a first passage defined in the first valve body. A restriction having an orifice for restricting the flow rate of hydrogen supplied to first and second communication chambers is mounted in a first port that is disposed upstream of the filter. The restriction and the filter are disposed coaxially in line with each other.Type: GrantFiled: December 1, 2003Date of Patent: May 9, 2006Assignee: Keihin CorporationInventors: Kouji Sonoda, Masakazu Murai, Kouetsu Hikichi, Hideki Sasaki, Yoshio Saito, Koji Katano, Kazunori Fukuma, Hiroyasu Ozaki, Kouji Miyano, Katsumi Sahoda
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Publication number: 20040232373Abstract: A diaphragm is clamped between a solenoid unit disposed in a casing and a second valve body in which hydrogen is introduced. A filter comprising a bottomed cylindrical mesh member is mounted in a first passage defined in the first valve body. A restriction having an orifice for restricting the flow rate of hydrogen supplied to first and second communication chambers is mounted in a first port that is disposed upstream of the filter. The restriction and the filter are disposed coaxially in line with each other.Type: ApplicationFiled: December 1, 2003Publication date: November 25, 2004Applicant: Keihin CorporationInventors: Kouji Sonoda, Masakazu Murai, Kouetsu Hikichi, Hideki Sasaki, Yoshio Saito, Koji Katano, Kazunori Fukuma, Hiroyasu Ozaki, Kouji Miyano, Katsumi Sahoda
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Publication number: 20040231726Abstract: A back pressure chamber is defined at an end of a rod for acting in a direction to cancel out a pressure applied to a valve head, and an aspirator chamber is defined closely to the valve head for developing a pressure lower than a secondary pressure due to a suction caused by a nozzle. The rod has a first communication hole and a second communication hole that are defined therein which provides fluid communication between the back pressure chamber and the aspirator chamber.Type: ApplicationFiled: December 1, 2003Publication date: November 25, 2004Applicant: Keihin CorporationInventors: Yoji Nakajima, Kazuki Ishikawa, Takashi Yoshida, Katsumi Sahoda, Kouji Miyano
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Patent number: 6706438Abstract: The ejector includes a diffuser, a nozzle, a needle, and a drive section. A throat portion and an increasing diameter portion are formed in a third conduit of the diffuser, and the nozzle and the needle are arranged coaxially with the third conduit. A first taper section of the needle is inserted into an aperture portion of the nozzle, and a second taper section is housed in the increasing diameter portion. A gap between the aperture portion and the first taper section constitutes a first fluid conduit, and a gap between the increasing diameter portion and the second taper section constitutes a second fluid conduit. The needle is provided so as to be shiftable in its axial direction by the drive section, and, by shifting the needle in its axial direction, it is possible to change both the first fluid conduit and the second fluid conduit simultaneously.Type: GrantFiled: August 10, 2001Date of Patent: March 16, 2004Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Katsumi Sahoda, Ryoichiro Takahashi, Kuri Kasuya, Kazunori Fukuma
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Publication number: 20030129472Abstract: A check valve is disposed in a hydrogen offgas circulation path which is connected to a fuel cell so as to flow the hydrogen offgas only in one direction. Inside a valve housing, a first compression chamber and a second compression chamber are provided such that a bulkhead is disposed therebetween. In the bulkhead 14, a first communication hole 18 and a second communication hole 19 are formed so as to communicate between the first compression chamber and the second compression chamber. In a first lead valve, an opening end is disposed upward and a fixed end is disposed downward. In a second lead valve, an opening end is disposed downward and a fixed end is disposed upward. By doing this, operability in the check valve after water has frozen can be improved.Type: ApplicationFiled: January 8, 2003Publication date: July 10, 2003Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHAInventors: Kazunori Fukuma, Kouji Miyano, Katsumi Sahoda
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Publication number: 20030077489Abstract: A fuel cell power generation system comprises a hydrogen reservoir that can occlude non-used hydrogen discharged from a fuel cell, and release the same. The hydrogen reservoir has a first storage section comprising an easily hydrogen occluding first hydrogen occlusion material, and a second storage section comprising an easily hydrogen releasing second hydrogen occlusion material. The non-used hydrogen from the fuel cell is once occluded in the first storage section, then the hydrogen obtained by releasing the occluded hydrogen is transferred to and occluded by the second storage section. When the fuel cell starts up, the occluded hydrogen is released from the second storage section, and supplied to the fuel cell.Type: ApplicationFiled: January 26, 2001Publication date: April 24, 2003Inventor: Katsumi Sahoda
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Publication number: 20020022172Abstract: The ejector includes a diffuser, a nozzle, a needle, and a drive section. A throat portion and an increasing diameter portion are formed in a third conduit of the diffuser, and the nozzle and the needle are arranged coaxially with the third conduit. A first taper section of the needle is inserted into an aperture portion of the nozzle, and a second taper section is housed in the increasing diameter portion. A gap between the aperture portion and the first taper section constitutes a first fluid conduit, and a gap between the increasing diameter portion and the second taper section constitutes a second fluid conduit. The needle is provided so as to be shiftable in its axial direction by the drive section, and, by shifting the needle in its axial direction, it is possible to change both the first fluid conduit and the second fluid conduit simultaneously.Type: ApplicationFiled: August 10, 2001Publication date: February 21, 2002Applicant: Honda Giken Kogyo Kabushiki KaishaInventors: Katsumi Sahoda, Ryoichiro Takahashi, Kuri Kasuya, Kazunori Fukuma