Patents by Inventor Hideki Machimura
Hideki Machimura 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: 6488478Abstract: An axial plunger pump which does not need bellows by restricting fuel to a cylinder bore configuring a pump portion and by lubricating the other portion with oil. The high pressure fuel pump includes a plunger reciprocating according to a shaking movement of a swash plate, a cylinder block forming a pump chamber together with the plunger, and a sealing member provided between the plunger and a cylinder bore for sealing oil leaked from the pump chamber to a chamber surrounding the pump chamber, wherein oil in the oil chamber is supplied from the outside of the high pressure fuel pump.Type: GrantFiled: May 9, 2002Date of Patent: December 3, 2002Assignee: Hitachi, Ltd.Inventors: Yoshinobu Ono, Yukio Takahashi, Hideki Machimura, Minoru Hashida, Masayoshi Kotaki, Takefumi Yamamura
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Patent number: 6471491Abstract: The present invention provides an axial plunger pump which does not need bellows by restricting fuel to a cylinder bore configuring a pump portion and by lubricating the other portion with oil. The high pressure fuel pump comprises a plunger reciprocating according to a shaking movement of a swash plate, a cylinder block forming a pump chamber together with the plunger, and a sealing member provided between the plunger and a cylinder bore for sealing oil leaked from the pump chamber to a chamber surrounding the pump chamber, wherein oil in the oil chamber is supplied from the outside of the high pressure fuel pump.Type: GrantFiled: March 16, 2000Date of Patent: October 29, 2002Assignee: Hitachi, Ltd.Inventors: Yoshinobu Ono, Yukio Takahashi, Hideki Machimura, Minoru Hashida, Masayoshi Kotaki, Takefumi Yamamura
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Publication number: 20020127119Abstract: The present invention provides an axial plunger pump which does not need bellows by restricting fuel to a cylinder bore configuring a pump portion and by lubricating the other portion with oil. The high pressure fuel pump comprises a plunger reciprocating according to a shaking movement of a swash plate, a cylinder block forming a pump chamber together with the plunger, and a sealing member provided between the plunger and a cylinder bore for sealing oil leaked from the pump chamber to a chamber surrounding the pump chamber, wherein oil in the oil chamber is supplied from the outside of the high pressure fuel pump.Type: ApplicationFiled: May 9, 2002Publication date: September 12, 2002Applicant: Hitachi, Ltd.Inventors: Yoshinobu Ono, Yukio Takahashi, Hideki Machimura, Minoru Hashida, Masayoshi Kotaki, Takefumi Yamamura
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Publication number: 20020044873Abstract: An axial plunger pump according to the present invention is constructed so as to comprise a shaft having a swash plate effecting swing motion and transmitting driving force from the outside, plungers each reciprocating by the swing motion of the swash plate, a cylinder block having cylinders formed so as to open on the side of the swash plate and inserting therein the plungers and having passages for supplying fuel to the cylinders, a body combined with the cylinder block to enclose the swash plate, and sealing members arranged between the plungers and the cylinders on the swash plate side of the passages formed in the cylinder block for sealing gaps between the plungers and the cylinders, respectively.Type: ApplicationFiled: December 17, 2001Publication date: April 18, 2002Applicant: Hitachi, Ltd.Inventors: Minoru Hashida, Yukio Takahashi, Yoshinobu Ono, Hideki Machimura, Takefumi Yamamura, Masayoshi Kotaki
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Patent number: 6368071Abstract: An axial plunger pump includes a shaft having a swash plate effecting swing motion and transmitting driving force from the outside, plungers reciprocate by the swing motion of the swash plate. A cylinder block has cylinders formed so as to open on the side of the swash plate, with the plungers inserted therein. Passages in the block supply refuel to the cylinders. A body combined with the cylinder block encloses the swash plate. Sealing members are arranged between the plungers and the cylinders on the swash plate side of the passages formed in the cylinder block for sealing gaps between the plungers and the cylinders, respectively.Type: GrantFiled: October 8, 1999Date of Patent: April 9, 2002Assignee: Hitachi, Ltd.Inventors: Minoru Hashida, Yukio Takahashi, Yoshinobu Ono, Hideki Machimura, Takefumi Yamamura, Masayoshi Kotaki
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Patent number: 6361286Abstract: The drive part for converting the revolution movement to the wobble movement is composed of the shaft for transmitting the drive force from outside, the swash plate rotated by the shaft and the wobble plate for converting the revolution movement of the swash plate to the wobble movement. Plural pistons are reciprocated in responsive to the wobble movement of the wobble plate. The crank room containing the swash plate, the wobble plate and the piston is separated into the fuel room and the drive room by the bellows. The bearings for transmitting the drive force between the shaft in the drive room and the swash plate, and the bearing for transmitting the drive force between the swash plate and the wobble plate are placed inside the drive room in order to lubricate the bearings. By arranging plural pistons inside the fuel room, the fuel is forced to be taken in and discharged by the reciprocate movement of the individual pistons.Type: GrantFiled: March 30, 2000Date of Patent: March 26, 2002Assignees: Hitachi, Ltd, Hitachi Car Engineering Co., Ltd.Inventors: Yukio Takahashi, Hideki Machimura, Yoshikazu Hoshi
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Patent number: 6210127Abstract: A motion converting mechanism for converting the rotating motion to the inclined gyration movement in a fuel pump is isolated from gasoline through a flexible isolating member. The lubrication of a load supporting portion in the fuel pump, which is enclosed in an interior portion of the flexible isolating member, can be performed. A sealing portion of a rotating shaft in the fuel pump is isolated from the gasoline by the flexible isolating member. The lubricating oil is sealed in an interior portion of an isolating area formed by the flexible isolating member.Type: GrantFiled: October 17, 1996Date of Patent: April 3, 2001Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Yoshikazu Hoshi, Hideki Machimura
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Patent number: 6098519Abstract: A drive part for converting rotational movement in a fuel pump to the wobble movement includes the shaft for transmitting an outside drive force, the swash plate rotated by the shaft and the wobble plate for converting the rotational movement of the swash plate to the wobble movement. Plural pistons are reciprocated in response to the wobble movement of the wobble plate. The crank room containing the swash plate, the wobble plate and the piston are separated into the fuel room and the drive room by bellows. The bearings for transmitting the drive force between the shaft in the drive room and the swash plate, and the bearing for transmitting the drive force between the swash plate and the wobble plate are placed inside the drive room in order to lubricate the bearings. By arranging plural pistons inside the fuel room, the fuel is forced to be taken in and discharged by the reciprocating movement of the individual pistons.Type: GrantFiled: September 9, 1997Date of Patent: August 8, 2000Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Yukio Takahashi, Hideki Machimura, Yoshikazu Hoshi
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Patent number: 6074175Abstract: A motion converting mechanism for converting the rotating motion to the inclined gyration movement in a fuel pump is isolated from gasoline through a flexible isolating member. The lubrication of a load supporting portion in the fuel pump, which is enclosed in an interior portion of the flexible isolating member, can be performed. A sealing portion of a rotating shaft in the fuel pump is isolated from the gasoline by the flexible isolating member. The lubricating oil is sealed in an interior portion of an isolating area formed by the flexible isolating member.Type: GrantFiled: April 1, 1999Date of Patent: June 13, 2000Assignees: Hitachi, Ltd., Hitachi Car Engineering Co. Ltd.Inventors: Yoshikazu Hoshi, Hideki Machimura