Patents by Inventor Hiroshi Odakura

Hiroshi Odakura 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: 7757663
    Abstract: The objective of the present invention is to dampen operating sounds of an electromagnetic drive mechanism used for a variable displacement to reduce an individual difference depending on apparatus due to the control mechanism in a high-pressure fuel supply pump change over time or installation tolerance. To achieve the above objective, the present invention is configured such that before the electromagnetic drive mechanism supplies a drive force to a plunger which is electromagnetically driven by the electromagnetic drive mechanism, another displacement force situates the plunger in a specific position. When compared to an occasion where the plunger is displaced all strokes by a magnetic biasing force, the above configuration is able to reduce the force of impact on a member (for example, valve body) mounted to the plunger and a restricting member, thereby damping the collision noise.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: July 20, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Satoshi Usui, Kenichiro Tokuo, Hiroyuki Yamada, Masami Abe, Hiroshi Odakura
  • Patent number: 7744353
    Abstract: A fluid pump has a cylinder supporting a plunger and a pump housing formed with dissimilar metals. A pressing mechanism presses the cylinder and the pump housing relative to each other so that a pressurizing chamber is sealed through a pressing surface between the pump housing and the cylinder. The number of seal points can be reduce, and a reduction in reliability can be eliminated while realizing a reduction in weight of the pump housing and a reduction in cost due to increase in cutting capability, by using a soft material such as an aluminum alloy for the pump housing.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: June 29, 2010
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Hiroyuki Yamada, Atsuji Saito, Masayoshi Kotaki, Hiroshi Odakura, Masami Abe
  • Patent number: 7665976
    Abstract: A high pressure fuel pump for an internal combustion engine having a cylinder, a plunger slidably fitted in the cylinder and a seal mechanism for blocking fuel leakage from an end of a sliding portion between the cylinder and the plunger and also for preventing an lubricant for a driving mechanism of the plunger from entering into the cylinder from the end of the sliding portion of the cylinder and the plunger. A holder surrounding the end of the sliding portion of the cylinder and the plunger is provided. The seal mechanism comprises two mutually independent seal devices mounted with a specific spacing in a longitudinal direction from the end of the sliding portion of the cylinder and the plunger along a circumference of the plunger. The two seal devices are held on the circumference of the plunger by the holder surrounding the end of the sliding portion of the cylinder and the plunger while keeping the specific spacing.
    Type: Grant
    Filed: April 24, 2006
    Date of Patent: February 23, 2010
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Satoshi Usui, Hiroyuki Yamada, Toru Onose, Atsuji Saito, Masami Abe, Masayoshi Kotaki, Hiroshi Odakura
  • Patent number: 7513240
    Abstract: A fuel feed system capable of feeding a fuel to fuel injection valves at a fuel pressure with improved stability is provided. A fuel feed system for an internal combustion engine including a fuel tank and a low-pressure pump for feeding the fuel in the fuel tank to fuel injection valves, is provided with a diaphragm type damper having a wave-shape cross section at a position in contact with the fuel.
    Type: Grant
    Filed: January 11, 2007
    Date of Patent: April 7, 2009
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Satoshi Usui, Hiroshi Odakura, Toru Onose, Atsuji Saito, Masami Abe, Hiroyuki Yamada
  • Publication number: 20080302333
    Abstract: The objective of the present invention is to dampen operating sounds of an electromagnetic drive mechanism used for a variable displacement to reduce an individual difference depending on apparatus due to the control mechanism in a high-pressure fuel supply pump change over time or installation tolerance. To achieve the above objective, the present invention is configured such that before the electromagnetic drive mechanism supplies a drive force to a plunger which is electromagnetically driven by the electromagnetic drive mechanism, another displacement force situates the plunger in a specific position. When compared to an occasion where the plunger is displaced all strokes by a magnetic biasing force, the above configuration is able to reduce the force of impact on a member (for example, valve body) mounted to the plunger and a restricting member, thereby damping the collision noise.
    Type: Application
    Filed: June 12, 2008
    Publication date: December 11, 2008
    Applicant: HITACHI, LTD.
    Inventors: Satoshi Usui, Kenichiro Tokuo, Hiroyuki Yamada, Masami Abe, Hiroshi Odakura
  • Patent number: 7398768
    Abstract: The objective of the present invention is to dampen operating sounds of an electromagnetic drive mechanism used for a variable displacement control mechanism in a high-pressure fuel supply pump to reduce an individual difference depending on apparatus due to the change over time or installation tolerance. To achieve the above objective, the present invention is configured such that before the electromagnetic drive mechanism supplies a drive force to a plunger which is electromagnetically driven by the electromagnetic drive mechanism, another displacement force situates the plunger in a specific position. When compared to an occasion where the plunger is displaced all strokes by a magnetic biasing force, the above configuration is able to reduce the force of impact on a member (for example, valve body) mounted to the plunger and a restricting member, thereby damping the collision noise.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: July 15, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Satoshi Usui, Kenichiro Tokuo, Hiroyuki Yamada, Masami Abe, Hiroshi Odakura
  • Publication number: 20070107698
    Abstract: A fuel feed system capable of feeding a fuel to fuel injection valves at a fuel pressure with improved stability is provided. A fuel feed system for an internal combustion engine including a fuel tank and a low-pressure pump for feeding the fuel in the fuel tank to fuel injection valves, is provided with a diaphragm type damper having a wave-shape cross section at a position in contact with the fuel.
    Type: Application
    Filed: January 11, 2007
    Publication date: May 17, 2007
    Applicants: HITACHI, LTD., HITACHI CAR ENGINEERING CO., LTD.
    Inventors: Satoshi Usui, Hiroshi Odakura, Toru Onose, Atsuji Saito, Masami Abe, Hiroyuki Yamada
  • Patent number: 7165534
    Abstract: A fuel feed system capable of feeding a fuel to fuel injection valves at a fuel pressure with improved stability is provided. A fuel feed system for an internal combustion engine including a fuel tank and a low-pressure pump for feeding the fuel in the fuel tank to fuel injection valves, is provided with a diaphragm type damper having a wave-shape cross section at a position in contact with the fuel.
    Type: Grant
    Filed: October 21, 2002
    Date of Patent: January 23, 2007
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co, Ltd.
    Inventors: Satoshi Usui, Hiroshi Odakura, Toru Onose, Atsuji Saito, Masami Abe, Hiroyuki Yamada
  • Patent number: 7152583
    Abstract: A simple structured high-pressure fuel pump. A fuel pump comprises a reciprocably-supported cylinder, a pressurizing chamber using part of the outer surface of the cylinder as the wall surface which move to change the internal volume, a fuel intake passage forming a fuel passage which introduces fuel to the pressurizing chamber, a fuel discharge passage for the compressed fuel coming out from the pressurizing chamber. A fuel intake valve is provided in fuel intake passage. A fuel discharge valve is provided in said fuel discharge passage. A connecting passage connects upstream side of the intake valve in the fuel intake passage and the downstream side of it. A check valve which flows fuel from the fuel discharge flow passage to the fuel intake passage is provided in the connecting passage.
    Type: Grant
    Filed: May 21, 2003
    Date of Patent: December 26, 2006
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Masami Abe, Hiroyuki Yamada, Toru Onose, Atsuji Saito, Satoshi Usui, Masayoshi Kotaki, Hiroshi Odakura
  • Publication number: 20060228239
    Abstract: A high pressure fuel pump for an internal combustion engine having a cylinder, a plunger slidably fitted in the cylinder and a seal mechanism for blocking fuel leakage from an end of a sliding portion between the cylinder and the plunger and also for preventing an lubricant for a driving mechanism of the plunger from entering into the cylinder from the end of the sliding portion of the cylinder and the plunger. A holder surrounding the end of the sliding portion of the cylinder and the plunger is provided. The seal mechanism comprises two mutually independent seal devices mounted with a specific spacing in a longitudinal direction from the end of the sliding portion of the cylinder and the plunger along a circumference of the plunger. The two seal devices are held on the circumference of the plunger by the holder surrounding the end of the sliding portion of the cylinder and the plunger while keeping the specific spacing.
    Type: Application
    Filed: April 24, 2006
    Publication date: October 12, 2006
    Applicants: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Satoshi Usui, Hiroyuki Yamada, Toru Onose, Atsuji Saito, Masami Abe, Masayoshi Kotaki, Hiroshi Odakura
  • Publication number: 20060201485
    Abstract: The objective of the present invention is to dampen operating sounds of an electromagnetic drive mechanism used for a variable displacement control mechanism in a high-pressure fuel supply pump to reduce an individual difference depending on apparatus due to the change over time or installation tolerance. To achieve the above objective, the present invention is configured such that before the electromagnetic drive mechanism supplies a drive force to a plunger which is electromagnetically driven by the electromagnetic drive mechanism, another displacement force situates the plunger in a specific position. When compared to an occasion where the plunger is displaced all strokes by a magnetic biasing force, the above configuration is able to reduce the force of impact on a member (for example, valve body) mounted to the plunger and a restricting member, thereby damping the collision noise.
    Type: Application
    Filed: February 16, 2006
    Publication date: September 14, 2006
    Applicant: Hitachi, Ltd.
    Inventors: Satoshi Usui, Kenichiro Tokuo, Hiroyuki Yamada, Masami Abe, Hiroshi Odakura
  • Publication number: 20040096346
    Abstract: A high pressure fuel pump for an internal combustion engine having a cylinder, a plunger slidably fitted in the cylinder and a seal mechanism for blocking fuel leakage from an end of a sliding portion between the cylinder and the plunger and also for preventing an lubricant for a driving mechanism of the plunger from entering into the cylinder from the end of the sliding portion of the cylinder and the plunger. A holder surrounding the end of the sliding portion of the cylinder and the plunger is provided. The seal mechanism comprises two mutually independent seal devices mounted with a specific spacing in a longitudinal direction from the end of the sliding portion of the cylinder and the plunger along a circumference of the plunger. The two seal devices are held on the circumference of the plunger by the holder surrounding the end of the sliding portion of the cylinder and the plunger while keeping the specific spacing.
    Type: Application
    Filed: July 8, 2003
    Publication date: May 20, 2004
    Inventors: Satoshi Usui, Hiroyuki Yamada, Toru Onose, Atsuji Saito, Masami Abe, Masayoshi Kotaki, Hiroshi Odakura
  • Publication number: 20040052652
    Abstract: A fluid pump, wherein a cylinder supporting a plunger and a pump housing are formed with dissimilar metals and a pressing mechanism to press the cylinder and the pump housing relatively to each other is provided so that a pressurizing chamber is sealed through a pressing surface between the pump housing and the cylinder, whereby the number of seal points can be reduced and a reduction in reliability can be eliminated while realizing a reduction in weight of the pump housing and a reduction in cost due to increase in cutting capability using a soft member such as aluminum alloy for the pump housing.
    Type: Application
    Filed: July 3, 2003
    Publication date: March 18, 2004
    Inventors: Hiroyuki Yamada, Atsuji Saito, Masayoshi Kotaki, Hiroshi Odakura, Masami Abe
  • Publication number: 20040052664
    Abstract: A high-pressure fuel feed pump, wherein a pump housing is formed of an aluminum alloy, a cylinder is formed of iron base metal, the flange part of a flanged tube member is held in a contact part between the pump housing and the cylinder, the tube member is installed in the pump housing along the inner wall surface thereof. As a result, a seal surface is not corroded directly since cavitation occurs between the tip of the tube member and the pump housing.
    Type: Application
    Filed: July 1, 2003
    Publication date: March 18, 2004
    Inventors: Atsuji Saito, Hiroyuki Yamada, Toru Onose, Masami Abe, Hiroshi Odakura
  • Publication number: 20030219346
    Abstract: A simple structured high-pressure fuel pump.
    Type: Application
    Filed: May 21, 2003
    Publication date: November 27, 2003
    Applicants: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Masami Abe, Hiroyuki Yamada, Toru Onose, Atsuji Saito, Satoshi Usui, Masayoshi Kotaki, Hiroshi Odakura
  • Publication number: 20030164161
    Abstract: A fuel feed system capable of feeding a fuel to fuel injection valves at a fuel pressure with improved stability is provided. A fuel feed system for an internal combustion engine including a fuel tank and a low-pressure pump for feeding the fuel in the fuel tank to fuel injection valves, is provided with a diaphragm type damper having a wave-shape cross section at a position in contact with the fuel.
    Type: Application
    Filed: October 21, 2002
    Publication date: September 4, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Satoshi Usui, Hiroshi Odakura, Toru Onose, Atsuji Saito, Masami Abe, Hiroyuki Yamada
  • Publication number: 20030017069
    Abstract: A high pressure fuel pump for an internal combustion engine having a cylinder, a plunger slidably fitted in the cylinder and a seal mechanism for blocking fuel leakage from an end of a sliding portion between the cylinder and the plunger and also for preventing an lubricant for a driving mechanism of the plunger from entering into the cylinder from the end of the sliding portion of the cylinder and the plunger. A holder surrounding the end of the sliding portion of the cylinder and the plunger is provided. The seal mechanism comprises two mutually independent seal devices mounted with a specific spacing in a longitudinal direction from the end of the sliding portion of the cylinder and the plunger along a circumference of the plunger. The two seal devices are held on the circumference of the plunger by the holder surrounding the end of the sliding portion of the cylinder and the plunger while keeping the specific spacing.
    Type: Application
    Filed: February 28, 2002
    Publication date: January 23, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Satoshi Usui, Hiroyuki Yamada, Toru Onose, Atsuji Saito, Masami Abe, Masayoshi Kotaki, Hiroshi Odakura