Patents by Inventor Ken Yoshino
Ken Yoshino 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).
-
Publication number: 20180147621Abstract: An apparatus for manufacturing a forged crankshaft includes a pair of upper and lower dies and a first tool. The pair of dies deforms first excess portions and thereby thickens both side portions of a rough crank arm, in a region near a rough pin adjacent thereto. The first tool is fitted in an open space made in the pair of dies, and is capable of coming into contact with a rough-journal-facing surface of the rough crank arm, except the side portions in the region near the adjacent rough pin. The first pair of dies and the first tool have first guides to guide the first tool from a retracting position to a contacting position. The first guides include a first guide disposed on at least one of an upper surface and a lower surface of the first tool.Type: ApplicationFiled: May 13, 2016Publication date: May 31, 2018Inventors: Tomohisa YAMASHITA, Sho TAKAMOTO, Hiroyuki KUROKAWA, Kunihiro YABUNO, Ken YOSHINO, Kenji TAMURA, Junichi OKUBO
-
Publication number: 20180111185Abstract: The disclosed production method includes a rough forging step of performing die forging to obtain a rough forged blank with flash having a crankshaft shape, and a finish forging step of applying die forging by use of a first pair of dies to the rough forged blank to obtain a finish forged blank with flash. In the rough forged blank, at least one of the rough crank arms have, in a region near an adjacent rough pin, a first excess portion protruding from an outer periphery of a side portion of the rough crank arm. During the die forging in the finish forging step, the first excess portion is deformed by the first pair of dies to bulge toward an adjacent rough journal.Type: ApplicationFiled: March 31, 2016Publication date: April 26, 2018Inventors: Sho TAKAMOTO, Kenji TAMURA, Tomohisa YAMASHITA, Kunihiro YABUNO, Ken YOSHINO, Hiroyuki KUROKAWA, Junichi OKUBO, Koichiro ISHIHARA
-
Publication number: 20180078994Abstract: A method for producing a forged crankshaft includes a die forging step of forming a forged blank having a crankshaft shape by die forging, and a pressing step of pressing the forged blank by a first dies. The forged blank includes first excess portions attached to some or all of crank arms each incorporating a counterweight, each of the first excess portions protrudes from a side portion of the crank arm, in a region near a journal. In the pressing step, the first excess portions are deformed by the first dies such that each of the first excess portions bulges toward a pin. This facilitates the production of a forged crankshaft with a reduced weight and assured stiffness.Type: ApplicationFiled: December 10, 2015Publication date: March 22, 2018Inventors: Kenji TAMURA, Junich OKUBO, Ken YOSHINO, Kunihiro YABUNO, Hiroyuki KUROKAWA, Tomohisa YAMASHITA, Sho TAKAMOTO, Koichiro ISHIHARA
-
Publication number: 20180056372Abstract: The disclosed production method includes a die forging step of obtaining a forged blank with flash having a crankshaft shape, and a trimming step of removing the flash from the forged blank while nipping the forged blank with a pair of holding dies. In the forged blank, at least one of the rough crank arms have, in a region near an adjacent rough pin, a first excess portion protruding from an outer periphery of a side portion of the rough crank arm. When the forged blank is nipped with the pair of holding dies, the first excess portion is deformed by the pair of holding dies to bulge toward an adjacent rough journal.Type: ApplicationFiled: March 31, 2016Publication date: March 1, 2018Inventors: Sho TAKAMOTO, Kenji TAMURA, Tomohisa YAMASHITA, Kunihiro YABUNO, Ken YOSHINO, Hiroyuki KUROKAWA, Junichi OKUBO, Koichiro ISHIHARA
-
Publication number: 20170234360Abstract: A crankshaft includes journals that define a central axis of rotation; crank pins that are eccentric with respect to the journals; crank arms connecting the journals to the crank pins; and counterweights integrated with the crank arms. Each of the crank arms has recesses in a surface adjacent to the crank pin. The recesses are disposed inward of peripheral regions in both sides along an edge of the surface, and are disposed along the peripheral regions. The crankshaft has a reduced weight, an increased torsional rigidity and an increased flexural rigidity.Type: ApplicationFiled: August 6, 2015Publication date: August 17, 2017Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Koichiro ISHIHARA, Kenji IMANISHI, Ken YOSHINO, Kunihiro YABUNO
-
Publication number: 20170189955Abstract: A method for producing a forged crankshaft includes: a preforming step of forming a preformed blank with no flash, the preformed blank including a shape of the crankshaft, wherein the crank arm have excess projecting portions at an outer peripheries of side portions of the crank arm near the crank pin; a die forging step of forming a forged blank with flash by pressing the preformed blank with a pair of first dies; and a trimming step of removing the flash from the forged blank. In the die forging step, while a second die is abutted against a journal-side surface of the crank arm and holds the surface, the excess projecting portions of the crank arm are deformed by the first dies so as to increase the side portions of the crank arm in thickness.Type: ApplicationFiled: July 9, 2015Publication date: July 6, 2017Inventors: Kenji TAMURA, Junichi OKUBO, Koichro ISHIHARA, Ken YOSHINO, Kunihiro YABUNO, Hiroyuki KUROKAWA, Tomohisa YAMASHITA, Sho TAKAMOTO
-
Publication number: 20170184146Abstract: When each of the crank arms is divided by the crank arm centerline-into a right arm portion and a left arm portion, an area moment of inertia of one of the right and the left arm portions that is in a side that is subjected to the maximum load is greater than an area moment of inertia of the other arm portion that is in a side opposite to the side that is subjected to the maximum load, and, the area moment of inertia of the arm portion that is in the side opposite to the side that is subjected to the maximum load is greater than the area moment of inertia of the arm portion that is in the side that is subjected to the maximum load.Type: ApplicationFiled: July 14, 2015Publication date: June 29, 2017Applicant: NIPPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Koichiro ISHIHARA, Ken YOSHINO
-
Publication number: 20170167529Abstract: A load due to combustion pressure is applied to each of the crank pins via a connecting rod in a direction from the axis of a piston pin to the axis of the crank pin. Each of the crank arms includes a recess in a surface adjacent to the journal, in a region inward of a peripheral region along the edge of the surface. The recess extends along the peripheral region, and is asymmetric with respect to a crank arm centerline connecting the axis of each of the crank pins to the axis of each of the journals. Each of the crank arms has a maximum flexural rigidity at a point of time when the load onto each of the crank pins due to the combustion pressure reaches a maximum. The crankshaft has a reduced weight and an increased torsional rigidity in combination with an increased flexural rigidity.Type: ApplicationFiled: July 14, 2015Publication date: June 15, 2017Inventors: Koichiro ISHIHARA, Ken YOSHINO, Kunihiro YABUNO
-
Patent number: 9667930Abstract: A CPU of a projector determines whether or not a correction mode in which the aspect ratio of an input image is changed to correct distortion is set and, if the correction mode is set, determines distortion correction process parameters for changing the aspect ratio of the image to be projected onto a screen to project the image in the form of a rectangular image, and the image converter performs geometric correction on the input image on the basis of the distortion correction process parameters to project the image subjected to distortion correction.Type: GrantFiled: March 21, 2014Date of Patent: May 30, 2017Assignee: CASIO COMPUTER CO., LTD.Inventors: Hideaki Inoue, Ken Yoshino
-
Patent number: 9626924Abstract: A display auxiliary device includes a light receiving sensor that receives display light from a display target, and a CPU that determines whether or not a switching display synchronous signal is included in the received display light, shields both a left-eye liquid crystal shutter and a right-eye liquid crystal shutter during a light reception period of time of the switching display synchronous signal based on the switching display synchronous signal, and performs a shutter switching operation of the left-eye liquid crystal shutter for the left-eye image and the right-eye liquid crystal shutter for the right-eye image to be switched and displayed, when the switching display synchronous signal is determined to be included.Type: GrantFiled: June 11, 2014Date of Patent: April 18, 2017Assignee: CASIO COMPUTER CO., LTD.Inventors: Kiyoshi Oda, Ken Yoshino
-
Publication number: 20160271684Abstract: A method for producing a forged crankshaft includes a die forging step, a trimming step, and an excess projecting portion crushing step. The die forging step forms a finish forged blank with flash, the finish forged blank including a shape of the crankshaft, in which crank arms have excess projecting portions at outer peripheries of side portions thereof near a crank pin, the excess projecting portions projecting from the outer peripheries. The trimming step removes the flash from the finish forged blank formed in the die forging step. The excess projecting portion crushing step crushes the excess projecting portions of the crank arms by pressing the crankshaft using a pair of first dies, the crankshaft being obtained by removing the flash in the trimming step.Type: ApplicationFiled: November 20, 2014Publication date: September 22, 2016Inventors: Kenji TAMURA, Junichi OKUBO, Koichiro ISHIHARA, Ken YOSHINO, Kunihiro YABUNO, Hiroyuki KUROKAWA, Tomohisa YAMASHITA, Sho TAKAMOTO
-
Publication number: 20160258476Abstract: A crankshaft includes: journals that define a central axis of rotation; crank pins that are eccentric with respect to the journals; and crank arms for connecting the journals and the crank pins, wherein each of the crank arms or at least one of the crank arms integrally includes a counterweight. The crank arms have a recess in a surface adjacent to a corresponding one of the journals, the recess disposed inward of a peripheral region along a periphery of the surface, the recess disposed along the peripheral region. With this configuration, it is possible to provide a crankshaft which has reduced weight and increased torsional rigidity in combination with increased flexural rigidity.Type: ApplicationFiled: October 14, 2014Publication date: September 8, 2016Inventors: Koichiro ISHIHARA, Kenji IMANISHI, Ken YOSHINO, Kunihiro YABUNO
-
Publication number: 20160256917Abstract: A method for producing a forged crankshaft includes a die forging step, a trimming step, and an excess projecting portion bending step. The die forging step forms a finish forged blank with flash, the finish forged blank including a shape of the crankshaft, in which crank arms have excess projecting portions at outer peripheries of side portions thereof near a crank pin, the excess projecting portions projecting from the outer peripheries. The trimming step removes the flash from the finish forged blank formed in the die forging step. The excess projecting portion bending step bends the excess projecting portions of the crank arms toward a journal-side surface of the crank arm by pressing the crankshaft using a pair of first dies, the crankshaft being obtained by removing the flash in the trimming step.Type: ApplicationFiled: November 20, 2014Publication date: September 8, 2016Inventors: Kenji Tamura, Junichi Okubo, Koichiro Ishihara, Ken Yoshino, Kunihiro Yabuno, Hiroyuki Kurokawa, Tomohisa Yamashita, Sho Takamoto
-
Publication number: 20160250679Abstract: A method for producing a forged crankshaft includes a die forging step, a trimming step, and an excess projecting portion bending step. The die forging step forms a finish forged blank with flash, the finish forged blank including a shape of the crankshaft, in which crank arms have excess projecting portions at outer peripheries of side portions thereof near a crank pin, the excess projecting portions projecting from the outer peripheries. The trimming step removes the flash from the finish forged blank formed in the die forging step. The excess projecting portion bending step bends the excess projecting portions of the crank arms toward a journal-side surface of the crank arm by inserting a first die having a U-shape from a direction of eccentricity of the crank pin to the crankshaft obtained by removing the flash in the trimming step.Type: ApplicationFiled: November 19, 2014Publication date: September 1, 2016Inventors: Kenji TAMURA, Junichi OKUBO, Koichiro ISHIHARA, Ken YOSHINO, Kunihiro YABUNO, Hiroyuki KUROKAWA, Tomohisa YAMASHITA, Sho TAKAMOTO
-
Patent number: 9234265Abstract: There is provided a steel for induction hardening in which cracks are less liable to occur and high hardness and seizure resistance are attained even if a tempering process after induction hardening is omitted. The steel for induction hardening according to the present invention contains, by mass percent, C: 0.20 to 0.34%, Si: at most 0.20%, Mn: 0.75 to 2.0%, P: at most 0.03%, S: at most 0.20%, Cr: 0.05 to 1.2%, Ti: at least 0.002% and less than 0.030%, Al: 0.005 to 0.04%, and N: 0.0040 to 0.020%, the balance being Fe and impurities, and satisfies Formula (1): 1.20?Mn+Cr?2.10??(1) where the content (mass %) of each element is substituted for each of the symbols of elements in Formula (1).Type: GrantFiled: June 27, 2011Date of Patent: January 12, 2016Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Yuta Mizobe, Hiroaki Tahira, Ken Yoshino
-
Publication number: 20150365656Abstract: A display auxiliary device includes a light receiving sensor that receives display light from a display target, and a CPU that determines whether or not a switching display synchronous signal is included in the received display light, shields both a left-eye liquid crystal shutter and a right-eye liquid crystal shutter during a light reception period of time of the switching display synchronous signal based on the switching display synchronous signal, and performs a shutter switching operation of the left-eye liquid crystal shutter for the left-eye image and the right-eye liquid crystal shutter for the right-eye image to be switched and displayed, when the switching display synchronous signal is determined to be included.Type: ApplicationFiled: June 11, 2014Publication date: December 17, 2015Inventors: Kiyoshi ODA, Ken YOSHINO
-
Publication number: 20150189260Abstract: An electronic device comprises a display unit, determination unit, parameter acquiring unit, and display control unit, and is configured as follows: the display unit can provide a three-dimensional display that makes an image stereoscopically viewable; the determination unit determines a posture of the display unit; the parameter acquiring unit acquires a control parameter that is related to the posture and intended to control a display operation of the display unit; the display control unit controls, on the basis of the control parameter acquired by the parameter acquiring unit, the display operation of the display unit, which is associated with the three-dimensional display.Type: ApplicationFiled: February 27, 2015Publication date: July 2, 2015Inventor: Ken YOSHINO
-
Publication number: 20150172643Abstract: An electronic device comprises a display unit, determination unit, parameter acquiring unit, and display control unit, and is configured as follows: the display unit can provide a three-dimensional display that makes an image stereoscopically viewable; the determination unit determines a posture of the display unit; the parameter acquiring unit acquires a control parameter that is related to the posture and intended to control a display operation of the display unit; the display control unit controls, on the basis of the control parameter acquired by the parameter acquiring unit, the display operation of the display unit, which is associated with the three-dimensional display.Type: ApplicationFiled: February 27, 2015Publication date: June 18, 2015Inventor: Ken YOSHINO
-
Patent number: 9041779Abstract: An electronic device comprises a display unit, determination unit, parameter acquiring unit, and display control unit, and is configured as follows: the display unit can provide a three-dimensional display that makes an image stereoscopically viewable; the determination unit determines a posture of the display unit; the parameter acquiring unit acquires a control parameter that is related to the posture and intended to control a display operation of the display unit; the display control unit controls, on the basis of the control parameter acquired by the parameter acquiring unit, the display operation of the display unit, which is associated with the three-dimensional display.Type: GrantFiled: January 22, 2010Date of Patent: May 26, 2015Assignee: NEC CorporationInventor: Ken Yoshino
-
Publication number: 20150143412Abstract: A content playback control device includes: an acquirer for acquiring an attribute of a listener that is the target of providing content; a determiner for determining a language when playing back the content, based on the attribute of the listener acquired by the acquirer; and a playback controller for playing back the content through audio in the determined language determined by the determiner.Type: ApplicationFiled: June 21, 2013Publication date: May 21, 2015Applicant: CASIO COMPUTER CO., LTD.Inventors: Takashi Shibuya, Katsuyuki Shibata, Ken Yoshino