Patents by Inventor Etsuo Fujita
Etsuo Fujita 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: 11883875Abstract: A forging apparatus and a forged product manufacturing method aim to prevent decrease in the temperature of a forging space and the temperature of a forging material, efficiently maintain the uniformity of the temperatures of upper and lower dies, and improve forging efficiency. In the forging apparatus and the forged product manufacturing method according to the present invention, the upper and lower dies are heated by a heating mechanism in a housing in which a charging port of an integrally formed housing body is closed by a door, the upper and lower dies are moved relatively in a facing direction of the upper and lower dies, the heating mechanism is moved relatively in the facing direction with respect to at least one of the relatively moving upper and lower dies, and whereby the forging material is forged between the upper and lower dies. Furthermore, the forged product manufacturing method is used to manufacture a forged product from the forging material.Type: GrantFiled: April 2, 2020Date of Patent: January 30, 2024Inventors: Shoichi Takahashi, Takanori Matsui, Etsuo Fujita, Takeshi Fukuyama, Shogo Suzuki
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Publication number: 20220219225Abstract: A forging apparatus and a forged product manufacturing method aim to prevent decrease in the temperature of a forging space and the temperature of a forging material, efficiently maintain the uniformity of the temperatures of upper and lower dies, and improve forging efficiency. In the forging apparatus and the forged product manufacturing method according to the present invention, the upper and lower dies are heated by a heating mechanism in a housing in which a charging port of an integrally formed housing body is closed by a door, the upper and lower dies are moved relatively in a facing direction of the upper and lower dies, the heating mechanism is moved relatively in the facing direction with respect to at least one of the relatively moving upper and lower dies, and whereby the forging material is forged between the upper and lower dies. Furthermore, the forged product manufacturing method is used to manufacture a forged product from the forging material.Type: ApplicationFiled: April 2, 2020Publication date: July 14, 2022Applicant: Hitachi Metals, Ltd.Inventors: Shoichi Takahashi, Takanori Matsui, Etsuo Fujita, Takeshi Fukuyama, Shogo Suzuki
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Patent number: 11319617Abstract: The present invention provides a method for producing a ring-rolled material of an Fe—Ni based superalloy which inhibits AGG, has a fine-grained structure having an ASTM grain size number of at least 8, and has high circularity. A method for producing a ring-rolled material of an Fe—Ni based superalloy having a composition of an Alloy 718 comprises: heating a ring-shaped material for ring rolling having the composition, in a temperature range of 900° C. to 980° C., and performing finishing ring rolling, as a finishing ring rolling step; heating the ring-rolled material that has been subjected to the finishing ring rolling, in a temperature range of 980 to 1010° C.; and correcting ellipticalness while expanding a diameter of the ring-rolled material by using a ring expander.Type: GrantFiled: September 19, 2019Date of Patent: May 3, 2022Assignee: HITACHI METALS, LTD.Inventors: Chuya Aoki, Tsuyoshi Fukui, Daigo Ohtoyo, Etsuo Fujita, Naoyuki Iwasa, Taku Hirosawa
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Publication number: 20220042144Abstract: The present invention provides a method for producing a ring-rolled material of an Fe—Ni based superalloy which inhibits AGG, has a fine-grained structure having an ASTM grain size number of at least 8, and has high circularity. A method for producing a ring-rolled material of an Fe—Ni based superalloy having a composition of an Alloy 718 comprises: heating a ring-shaped material for ring rolling having the composition, in a temperature range of 900° C. to 980° C., and performing finishing ring rolling, as a finishing ring rolling step; heating the ring-rolled material that has been subjected to the finishing ring rolling, in a temperature range of 980 to 1010° C.; and correcting ellipticalness while expanding a diameter of the ring-rolled material by using a ring expander.Type: ApplicationFiled: September 19, 2019Publication date: February 10, 2022Inventors: Chuya AOKI, Tsuyoshi FUKUI, Daigo OHTOYO, Etsuo FUJITA, Naoyuki IWASA, Taku HIROSAWA
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Publication number: 20220032359Abstract: A method for producing a ring-rolled material of an Fe—Ni based superalloy, which has a high circularity, can inhibit AGG, and can inhibit grain growth. A method for producing a ring-rolled material of an Fe—Ni based superalloy having a composition of an Alloy 718 comprises: a finishing ring rolling step of heating a ring-shaped material for ring rolling having the composition, in a temperature range of 900° C. to 980° C., and performing finishing ring rolling; and a circularity correcting step of correcting an ellipticalness of the ring-rolled material that has been rolled in the finishing ring rolling step, while expanding a diameter of the ring-rolled material by using a ring expander including a pipe-expanding cone and a pipe-expanding die, wherein the ring-rolled material that has been rolled in the finishing ring rolling step is subjected to circularity correction without being reheated or after having been heated to up to 960° C.Type: ApplicationFiled: September 19, 2019Publication date: February 3, 2022Inventors: Chuya AOKI, Tsuyoshi FUKUI, Daigo OHTOYO, Etsuo FUJITA, Naoyuki IWASA, Taku HIROSAWA
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Patent number: 11208040Abstract: Provided is a display system, which makes it easy for an operator to accurately grasp a traveling situation of a work vehicle. A front camera captures an excavating blade and topography in front of a crawler dozer. A rear camera captures a fuel tank and a ripper apparatus, and a topography behind the crawler dozer. A display image displayed on a monitor is generated by arranging a front image captured by the front camera and a rear image captured by the rear camera so that the excavating blade in the front image may face the fuel tank in the rear image.Type: GrantFiled: October 6, 2016Date of Patent: December 28, 2021Assignee: KOMATSU LTD.Inventors: Takashi Tsukamoto, Etsuo Fujita, Sueyoshi Nishimine, Masahiro Ikeda, Koji Okuda
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Patent number: 10619327Abstract: A bulldozer includes a blade disposed in front of a vehicle body. First and second cameras are disposed to the left and right of the vehicle body, respectively. A first optical axis of the first camera faces forward and downward. The first camera is arranged to capture a first image of a gap between a lower edge of the blade and the left crawler belt. A second optical axis of the second camera faces forward and downward. The second camera is arranged to capture a second image of a gap between a lower edge of the blade and the right crawler belt. A display is configured to display the first and second images side-by-side.Type: GrantFiled: September 10, 2019Date of Patent: April 14, 2020Assignee: KOMATSU LTD.Inventors: Takashi Tsukamoto, Kazuki Kure, Etsuo Fujita, Sueyoshi Nishimine, Masahiro Ikeda
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Publication number: 20200002915Abstract: A bulldozer includes a blade disposed in front of a vehicle body. First and second cameras are disposed to the left and right of the vehicle body, respectively. A first optical axis of the first camera faces forward and downward. The first camera is arranged to capture a first image of a gap between a lower edge of the blade and the left crawler belt. A second optical axis of the second camera faces forward and downward. The second camera is arranged to capture a second image of a gap between a lower edge of the blade and the right crawler belt. A display is configured to display the first and second images side-by-side.Type: ApplicationFiled: September 10, 2019Publication date: January 2, 2020Inventors: Takashi TSUKAMOTO, Kazuki KURE, Etsuo FUJITA, Sueyoshi NISHIMINE, Masahiro IKEDA
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Patent number: 10472806Abstract: Provided is a display system capable of facilitating appropriate ripping work. A right ripper side camera images a ripping tip. The right ripper side camera is mounted on a vehicle main body. The image generating unit generates a display image. The display image includes an image of the ripping tip by an imaging unit and information about a rotative running of a crawler belt. A display unit displays the display image.Type: GrantFiled: October 6, 2016Date of Patent: November 12, 2019Assignee: KOMATSU LTD.Inventors: Takashi Tsukamoto, Etsuo Fujita, Sueyoshi Nishimine, Masahiro Ikeda
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Patent number: 10450719Abstract: A bulldozer includes a blade disposed in front of a vehicle body. First and second cameras are disposed to the left and right of the vehicle body, respectively. A first optical axis of the first camera faces forward and downward. The first camera overlaps a left crawler belt as seen in a plan view of the bulldozer and is arranged to capture a first image of a gap between a lower edge of the blade and the left crawler belt. A second optical axis of the second camera faces forward and downward. The second camera overlaps a right crawler belt as seen in a plan view of the bulldozer and is arranged to capture a second image of a gap between a lower edge of the blade and the right crawler belt. A display is configured to display the first and second images side-by-side.Type: GrantFiled: April 17, 2019Date of Patent: October 22, 2019Assignee: KOMATSU LTD.Inventors: Takashi Tsukamoto, Kazuki Kure, Etsuo Fujita, Sueyoshi Nishimine, Masahiro Ikeda
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Patent number: 10415212Abstract: A bulldozer has a protective structure. The protective structure includes a left pillar portion, a right pillar portion, and a beam portion. The left pillar portion is disposed to the left of a cab and extends in the up-down direction. The right pillar portion is disposed to the right of the cab and extends in the up-down direction. The beam portion is disposed above the cab and couples the left pillar portion and the right pillar portion. A first camera is attached to the left pillar portion and is disposed so that a first optical axis faces forward and downward. A second camera is attached to the right pillar portion and is disposed so that a second optical axis faces forward and downward.Type: GrantFiled: September 9, 2016Date of Patent: September 17, 2019Assignee: KOMATSU LTD.Inventors: Takashi Tsukamoto, Kazuki Kure, Etsuo Fujita, Sueyoshi Nishimine, Masahiro Ikeda
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Publication number: 20190242089Abstract: A bulldozer includes a blade disposed in front of a vehicle body. First and second cameras are disposed to the left and right of the vehicle body, respectively. A first optical axis of the first camera faces forward and downward. The first camera overlaps a left crawler belt as seen in a plan view of the bulldozer and is arranged to capture a first image of a gap between a lower edge of the blade and the left crawler belt. A second optical axis of the second camera faces forward and downward. The second camera overlaps a right crawler belt as seen in a plan view of the bulldozer and is arranged to capture a second image of a gap between a lower edge of the blade and the right crawler belt. A display is configured to display the first and second images side-by-side.Type: ApplicationFiled: April 17, 2019Publication date: August 8, 2019Inventors: Takashi TSUKAMOTO, Kazuki KURE, Etsuo FUJITA, Sueyoshi NISHIMINE, Masahiro IKEDA
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Patent number: 10267020Abstract: In a display system in an excavator, a position of an upper boundary line and a position of a lower boundary line are calculated. The upper boundary line indicates a height of a top of a cross section of a display object surface. The lower boundary line indicates a height of a bottom of the cross section of the display object surface. A predetermined reference point of a display range is set based on a positional relationship in an up-and-down direction between the current position of the excavator and the upper boundary line or between the current position of the excavator and the lower boundary line. A guidance picture showing a cross section of the display object surface included in the predetermined display range as seen from a side of the excavator, and the current position of the excavator, is displayed.Type: GrantFiled: August 15, 2016Date of Patent: April 23, 2019Assignee: KOMATSU LTD.Inventors: Ryo Fukano, Azumi Nomura, Takashi Kurihara, Etsuo Fujita, Masao Ando, Toshihiro Koide
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Patent number: 10094238Abstract: The present invention provides a high quality material for ring rolling. The material includes radially outer and inner peripheral surfaces. In the material, a center of gravity on a half section is located so as to be closer to the outer peripheral surface in contact with a main roll than a center of the half section in a thickness direction, a shape of the half section includes a height reducing portion having a height from a center line dividing the half section into halves in a height direction, this height is gradually reduced toward the inner peripheral surface in contact with a mandrel roll, and the shape is formed in a substantially linear symmetry such that the center line is a symmetric axis. A height of the inner peripheral surface is from 20% to 50% of a maximum height of the material.Type: GrantFiled: March 18, 2014Date of Patent: October 9, 2018Assignee: Hitachi Metals, Ltd.Inventors: Tetsuya Yagami, Toshiya Teramae, Etsuo Fujita, Shinya Nagao, Remi Mukouse, Naoyuki Iwasa, Tsuyoshi Fukui, Chuya Aoki
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Publication number: 20180244201Abstract: Provided is a display system, which makes it easy for an operator to accurately grasp a traveling situation of a work vehicle. A front camera captures an excavating blade and topography in front of a crawler dozer. A rear camera captures a fuel tank and a ripper apparatus, and a topography behind the crawler dozer. A display image displayed on a monitor is generated by arranging a front image captured by the front camera and a rear image captured by the rear camera so that the excavating blade in the front image may face the fuel tank in the rear image.Type: ApplicationFiled: October 6, 2016Publication date: August 30, 2018Applicant: KOMATSU LTD.Inventors: Takashi TSUKAMOTO, Etsuo FUJITA, Sueyoshi NISHIMINE, Masahiro IKEDA, Koji OKUDA
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Publication number: 20180202131Abstract: Provided is a display system capable of facilitating appropriate ripping work. A right ripper side camera images a ripping tip. The right ripper side camera is mounted on a vehicle main body. The image generating unit generates a display image. The display image includes an image of the ripping tip by an imaging unit and information about a rotative running of a crawler belt. A display unit displays the display image.Type: ApplicationFiled: October 6, 2016Publication date: July 19, 2018Applicant: KOMATSU LTD.Inventors: Takashi TSUKAMOTO, Etsuo FUJITA, Sueyoshi NISHIMINE, Masahiro IKEDA
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Publication number: 20180073214Abstract: A bulldozer has a protective structure. The protective structure includes a left pillar portion, a right pillar portion, and a beam portion. The left pillar portion is disposed to the left of a cab and extends in the up-down direction. The right pillar portion is disposed to the right of the cab and extends in the up-down direction. The beam portion is disposed above the cab and couples the left pillar portion and the right pillar portion. A first camera is attached to the left pillar portion and is disposed so that a first optical axis faces forward and downward. A second camera is attached to the right pillar portion and is disposed so that a second optical axis faces forward and downward.Type: ApplicationFiled: September 9, 2016Publication date: March 15, 2018Inventors: Takashi TSUKAMOTO, Kazuki KURE, Etsuo FUJITA, Sueyoshi NISHIMINE, Masahiro IKEDA
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Patent number: 9719369Abstract: A manufacturing method provides a high-quality material for ring rolling. The manufacturing method of the material for ring rolling includes a step of heating a disk-shaped material for hot forging to a hot working temperature, a step of arranging the material for hot forging onto a lower die having a convex portion with a truncated conical shape, a step of forming a thin portion by pressing a center portion of the material for hot forging by using an upper die having a convex portion with a truncated conical shape, and a step of manufacturing a material for ring rolling by removing the thin portion wherein a center of gravity on a half section of the material for ring rolling is located so as to be closer to an outer peripheral surface of the half section than a center of the half section in a thickness direction of the half section.Type: GrantFiled: March 18, 2014Date of Patent: August 1, 2017Assignee: HITACHI METALS, LTD.Inventors: Tetsuya Yagami, Toshiya Teramae, Etsuo Fujita, Shinya Nagao, Remi Mukouse, Naoyuki Iwasa, Tsuyoshi Fukui, Chuya Aoki
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Patent number: 9574250Abstract: Provided is a method for fabricating a stepped forged material that can realize a uniform microscopic structure in both the large diameter flange portion and the small diameter shaft portion. This method for fabricating a stepped forged material comprises the following steps: a step for obtaining a primary forged material in which an austenite stainless steel billet is heated to 1000-1080° C., and, without any further heating, the material is forged by means of reciprocal forging into a round rod having along the entire length thereof a forging ratio of 1.5 or greater; a step for obtaining a secondary forged material, that forms the large diameter flange portion and the small diameter shaft portion, in which without reheating, the small diameter shaft portion is formed by means of reciprocal forging at a temperature where the surface temperature of the primary forged material never falls more than 200° C.Type: GrantFiled: April 24, 2012Date of Patent: February 21, 2017Assignee: HITACHI METALS, LTD.Inventors: Shinya Nagao, Etsuo Fujita
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Publication number: 20160356022Abstract: In a display system in an excavator, a position of an upper boundary line and a position of a lower boundary line are calculated. The upper boundary line indicates a height of a top of a cross section of a display object surface. The lower boundary line indicates a height of a bottom of the cross section of the display object surface. A predetermined reference point of a display range is set based on a positional relationship in an up-and-down direction between the current position of the excavator and the upper boundary line or between the current position of the excavator and the lower boundary line. A guidance picture showing a cross section of the display object surface included in the predetermined. display range as seen from a side of the excavator, and the current position of the excavator, is displayed.Type: ApplicationFiled: August 15, 2016Publication date: December 8, 2016Inventors: Ryo FUKANO, Azumi NOMURA, Takashi KURIHARA, Etsuo FUJITA, Masao ANDO, Toshihiro KOIDE