Patents by Inventor Hideki Akamatsu
Hideki Akamatsu 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: 8746054Abstract: An object is to provide a peel tester that continuously detects the characteristics of an adhesive tape from the moment an impact is applied to an adherend until the adherend is peeled, and a new method for evaluating the impact peel characteristics of an adhesive tape, which enables quantitative evaluation for the impact peel characteristics by using the test result obtained by the peel tester. Provided is a peel tester 1 with a main body 2, to which an adherend I is to be adhered via an adhesive tape III, for performing a peel test by an impact applied to the adherend I, which includes: a load detection device 6 that detects change in load applied to the adhesive tape I until the adherend I is peeled off from the main body 2; and a displacement detection device 7 that detects change in moving distance of the adherend I until the adherend I is peeled off from the main body 2.Type: GrantFiled: May 8, 2009Date of Patent: June 10, 2014Assignee: Nitto Denko CorporationInventors: Hideki Akamatsu, Kaori Numa, Yasunori Sugihara, Junji Yoshida
-
Patent number: 8262291Abstract: A coreless seal arranged between a rotation shaft and an outer member has an inner diameter surface opposed to an outer diameter surface of the rotation shaft with a space for preventing leakage of fluid. The outer member has a flange bent inwardly. The coreless seal has an outer diameter and an inner diameter that are dimensions obtained by adding interference for an amount of thermal shrinkage as a whole dimension.Type: GrantFiled: August 31, 2006Date of Patent: September 11, 2012Assignees: NTN Corporation, Uchiyama Manufacturing Corp.Inventors: Hideki Akamatsu, Kenji Nakagawa
-
Publication number: 20110037687Abstract: An object is to provide a peel tester that continuously detects the characteristics of an adhesive tape from the moment an impact is applied to an adherend until the adherend is peeled, and a new method for evaluating the impact peel characteristics of an adhesive tape, which enables quantitative evaluation for the impact peel characteristics by using the test result obtained by the peel tester. Provided is a peel tester 1 with a main body 2, to which an adherend I is to be adhered via an adhesive tape III, for performing a peel test by an impact applied to the adherend I, which includes: a load detection device 6 that detects change in load applied to the adhesive tape I until the adherend I is peeled off from the main body 2; and a displacement detection device 7 that detects change in moving distance of the adherend I until the adherend I is peeled off from the main body 2.Type: ApplicationFiled: May 8, 2009Publication date: February 17, 2011Applicant: NITTO DENKO CORPORATIONInventors: Hideki Akamatsu, Kaori Numa, Yasunori Sugihara, Junji Yoshida
-
Patent number: 7766555Abstract: A roller bearing utilizing a roller retainer, which has an excellent assemblability in the sense that the assembly line can be automated and which eliminates various problems inherent in the full complement roller bearing The roller bearing includes an outer race having a raceway, a plurality of rollers held in rolling contact with the raceway, and a ring-shaped roller retainer having a plurality of pockets, each rollingly receiving the respective roller, spacedly defined therein in a direction circumferentially thereof to form a ladder-like structure. The roller retainer has a plurality of slits that are spacedly defined in a direction circumferential thereof so as to extend from one axial end or the other axial end of the roller retainer to a position adjacent the other axial end or one axial end.Type: GrantFiled: February 9, 2005Date of Patent: August 3, 2010Assignee: NTN CorporationInventors: Shingo Kono, Kousuke Obayashi, Hideki Akamatsu
-
Patent number: 7758251Abstract: A drawn cup needle roller bearing comprises a drawn cup having flanges formed by a bending process at both ends, rollers arranged along the inner diameter surface of the drawn cup, and a no-metal cored seal incorporated on the inner diameter side of the drawn cup. The drawn cup in which the rollers are incorporated is heat treated and the no-metal cored seal is elastically deformed and incorporated inside the drawn cup past the flange. Here, the roller has a nitrogen-enriched layer on its surface layer, and the nitrogen-enriched layer contains not less than 20% by volume of retained austenite.Type: GrantFiled: August 28, 2006Date of Patent: July 20, 2010Assignee: NTN CorporationInventor: Hideki Akamatsu
-
Patent number: 7617677Abstract: A stator unit for a torque converter includes a stator, a one-way clutch mounted radially inside the stator, and thrust bearings provided on both axial sides of the one-way clutch. The one-way clutch includes an outer ring having a peripheral wall and side walls extending radially inwardly from the respective side edges of the peripheral wall and each having a flange formed at the radially inner edge thereof, an inner ring which is in sliding contact with the flanges, and sprags disposed between the inner surface of the peripheral wall and the outer surface of the inner ring. Each of the thrust bearings has a stake which is pressed into one of engaging steps formed in the radially inner surface of the stator until the bearing ring of the thrust bearing is pressed against one of the side walls and one of axial end surfaces of the inner ring, thereby retaining the component parts so as to be inseparable from the stator.Type: GrantFiled: March 21, 2007Date of Patent: November 17, 2009Assignee: NTN CorporationInventors: Hideki Akamatsu, Takahide Saito, Yasumasa Hibi, Takashi Hattori, Katsufumi Abe
-
Publication number: 20090154854Abstract: A coreless seal 11 for being assembled in a shell-type roller bearing provided in a shell-type roller bearing comprises an elastic annular member 12. An outer diameter B of the coreless seal 11 for being assembled in the shell-type roller bearing is a dimension provided by adding interference 2A for an amount of thermal shrinkage to an inner diameter C of a shell-type outer ring. Since the annular member 12 shrinks in a direction shown by an arrow W at low temperature, the outer diameter of the coreless seal 11 for being assembled in the shell-type roller bearing is reduced from B to B?. However, since the outer diameter B is provided with the dimension A obtained by adding interference for an amount of thermal shrinkage, the coreless seal 11 for being assembled in the shell-type roller bearing has interference A? in its outer diameter B? even after the shrinkage.Type: ApplicationFiled: August 31, 2006Publication date: June 18, 2009Applicants: NTN CORPORATION, UCHIYAMA MANUFACTURING CORP.Inventors: Hideki Akamatsu, Kenji Nakagawa
-
Patent number: 7494715Abstract: A steel plate reinforcing sheet that can reduce distortions of the steel plate without reducing its reinforcing property and can also prevent abrupt deformations at end portions thereof with respect to a direction extending along a curving direction of a curved steel plate. The steel reinforcing sheet features a generally rectangular shape, as defined by a length and a width, and two end portions on either side of an imaginary line which bisects the length of the steel plate reinforcing sheet. The steel plate reinforcing sheet is a laminate including a restricting layer and a reinforcing layer, wherein each end portion of the restricting layer includes at least one slit. Each slit extends directly or indirectly across the entire width of the steel plate reinforcing sheet, and the two slits closest to the imaginary line define a minimum distance between slits.Type: GrantFiled: June 8, 2005Date of Patent: February 24, 2009Assignee: Nitto Denko CorporationInventors: Yuki Kagehisa, Fuyuki Eriguchi, Hideki Akamatsu
-
Patent number: 7390127Abstract: To provide a roller bearing assembly that can provide a high load bearing capacity and in which the strength of roller retainers can be increased, the roller bearing assembly includes inner and outer roller retainers (13, 23) each having a plurality of circumferentially arranged pockets (4), and a circular row of rollers (2) received in part within the pockets in the inner roller (13) and in part within the pockets in the outer roller (23). The inner roller retainer (13) has pillars (5) each left between the neighboring pockets to retain the circular row of the rollers from radially inwardly and having an outer diameter smaller than the diameter of the pitch circle PCD of the circular row of the rollers. The outer roller retainer (23) has pillars (5) each left between the neighboring pockets to retain the circular row of the rollers from radially outwardly and having an inner diameter greater than the pitch circle diameter PCD.Type: GrantFiled: November 14, 2005Date of Patent: June 24, 2008Assignee: NTN CorporationInventors: Shingo Kono, Kousuke Obayashi, Hideki Akamatsu
-
Publication number: 20070220875Abstract: A stator unit for a torque converter includes a stator, a one-way clutch mounted radially inside the stator, and thrust bearings provided on both axial sides of the one-way clutch. The one-way clutch includes an outer ring having a peripheral wall and side walls extending radially inwardly from the respective side edges of the peripheral wall and each having a flange formed at the radially inner edge thereof, an inner ring which are in sliding contact with the flanges, and sprags disposed between the inner surface of the peripheral wall and the outer surface of the inner ring. The thrust bearings each have a stake which is pressed into one of engaging steps formed in the radially inner surface of the stator until the bearing ring of the thrust bearing is pressed against one of the side walls and one of axial end surfaces of the inner ring, thereby retaining the component parts so as to be inseparable from the stator.Type: ApplicationFiled: March 21, 2007Publication date: September 27, 2007Inventors: Hideki Akamatsu, Takahide Saito, Yasumasa Hibi, Takashi Hattori, Katsufumi Abe
-
Patent number: 7220060Abstract: To provide a roller bearing assembly, which can be assembled with a minimized number of assembling steps and without any drop-off preventing sleeve being employed and which can provide a large load bearing capacity, the roller bearing assembly includes an inner race 1 having a raceway surface 1a defined therein, a plurality of rollers 2, and a ring-shaped roller retainer 3 having a plurality of pockets 4 defined therein in a direction circumferentially thereof for accommodating therein the respective rollers 2 in a circular row. The roller retainer 3 also has pillars 5 each defined between the neighboring pockets 4. The roller retainer 3 is positioned on the inner race 1 with each of the pillars 5 thereof intervening between the neighboring rollers 2 to thereby retain the rollers 2 in position within the respective pockets 4 from a direction radially outwardly of the row of the rollers 2.Type: GrantFiled: March 7, 2005Date of Patent: May 22, 2007Assignee: NTN CorporationInventors: Shingo Kono, Kousuke Obayashi, Hideki Akamatsu
-
Publication number: 20070047862Abstract: A drawn cup needle roller bearing comprises a drawn cup having flanges formed by a bending process at both ends, rollers arranged along the inner diameter surface of the drawn cup, and a no-metal cored seal incorporated on the inner diameter side of the drawn cup. The drawn cup in which the rollers are incorporated is heat treated and the no-metal cored seal is elastically deformed and incorporated inside the drawn cup past the flange. Here, the roller has a nitrogen-enriched layer on its surface layer, and the nitrogen-enriched layer contains not less than 20% by volume of retained austenite.Type: ApplicationFiled: August 28, 2006Publication date: March 1, 2007Inventor: Hideki Akamatsu
-
Publication number: 20060104560Abstract: To provide a roller bearing assembly that can provide a high load bearing capacity and in which the strength of roller retainers can be increased, the roller bearing assembly includes inner and outer roller retainers (13, 23) each having a plurality of circumferentially arranged pockets (4), and a circular row of rollers (2) received in part within the pockets in the inner roller (13) and in part within the pockets in the outer roller (23). The inner roller retainer (13) has pillars (5) each left between the neighboring pockets to retain the circular row of the rollers from radially inwardly and having an outer diameter smaller than the diameter of the pitch circle PCD of the circular row of the rollers. The outer roller retainer (23) has pillars (5) each left between the neighboring pockets to retain the circular row of the rollers from radially outwardly and having an inner diameter greater than the pitch circle diameter PCD.Type: ApplicationFiled: November 14, 2005Publication date: May 18, 2006Applicant: NTN CORPORATIONInventors: Shingo Kono, Kousuke Obayashi, Hideki Akamatsu
-
Publication number: 20050276984Abstract: A steel plate reinforcing sheet that can reduce distortions of the steel plate without reducing its reinforcing property and can also prevent abrupt deformations at end portions thereof with respect to a direction extending along a curving direction of a curved steel plate. The steel plate reinforcing sheet 1 comprising a restricting layer 2 and a reinforcing layer 3, wherein slits 4 are formed in both end portions of the restricting layer 2 to extend over an entire length of the restricting layer 2 with respect to a direction substantially orthogonal to a direction in which the both end portions confront each other and also arranged so that a length defined between the slits 4 can be 40% or more of a total length of the steel plate reinforcing sheet 1 with respect to a direction parallel to the length between the slits 4.Type: ApplicationFiled: June 8, 2005Publication date: December 15, 2005Applicant: Nitto Denko CorporationInventors: Yuki Kagehisa, Fuyuki Eriguchi, Hideki Akamatsu
-
Publication number: 20050196089Abstract: To provide a roller bearing assembly, which can be assembled with a minimized number of assembling steps and without any drop-off preventing sleeve being employed and which can provide a large load bearing capacity, the roller bearing assembly includes an inner race 1 having a raceway surface 1a defined therein, a plurality of rollers 2, and a ring-shaped roller retainer 3 having a plurality of pockets 4 defined therein in a direction circumferentially thereof for accommodating therein the respective rollers 2 in a circular row. The roller retainer 3 also has pillars 5 each defined between the neighboring pockets 4. The roller retainer 3 is positioned on the inner race 1 with each of the pillars 5 thereof intervening between the neighboring rollers 2 to thereby retain the rollers 2 in position within the respective pockets 4 from a direction radially outwardly of the row of the rollers 2.Type: ApplicationFiled: March 7, 2005Publication date: September 8, 2005Applicant: NTN CORPORATIONInventors: Shingo Kono, Kousuke Obayashi, Hideki Akamatsu
-
Publication number: 20050185875Abstract: There is provided a roller bearing utilizing a roller retainer, which has an excellent assemblability in the sense that the assembly line can be automated and which eliminates various problems inherent in the full complement roller bearing The roller bearing includes an outer race (1) having a raceway, a plurality of rollers (2) held in rolling contact with the raceway, and a ring-shaped roller retainer (3) having a plurality of pockets (4), each rollingly receiving the respective roller (2), spacedly defined therein in a direction circumferentially thereof to form a ladder-like structure. The roller retainer (3) has a plurality of slits (7, 7A) that are spacedly defined in a direction circumferential thereof so as to extend from one axial end or the other axial end of the roller retainer (3) to a position adjacent the other axial end or one axial end.Type: ApplicationFiled: February 9, 2005Publication date: August 25, 2005Applicant: NTN CORPORATIONInventors: Shingo Kono, Kousuke Obayashi, Hideki Akamatsu
-
Publication number: 20050084670Abstract: A pressure-sensitive adhesive type optical film which comprises an optical film and a pressure-sensitive adhesive layer superposed on at least one side thereof through an anchor layer formed from a resin emulsion. It is easy to handle because the pressure-sensitive adhesive does not peel off even when an edge of the film comes into contract during handling in use.Type: ApplicationFiled: January 28, 2003Publication date: April 21, 2005Inventors: Masayuki Satake, Shigeo Kobayashi, Michio Umeda, Chiaki Harada, Naoki Sadayori, Hideki Akamatsu, Akiko Ogasawara
-
Publication number: 20050073633Abstract: A pressure-sensitive adhesive type optical film which comprises an optical film and a pressure-sensitive adhesive layer superposed on at least one side thereof through an anchor layer formed from a polyamine compound. It is easy to handle because the pressure-sensitive adhesive does not peel off even when an edge of the film comes into contract during handling in use. The pressure-sensitive adhesive type optical film can be inhibited from being electrostatically charged upon peeling.Type: ApplicationFiled: January 28, 2003Publication date: April 7, 2005Inventors: Masayuki Satake, Shigeo Kobayashi, Michio Umeda, Chiaki Harada, Naoki Sadayori, Hideki Akamatsu, Akiko Ogasawara
-
Publication number: 20040221939Abstract: An invented pressure-sensitive adhesive sheet for removal of a solvent-containing substance includes a substrate and a pressure sensitive adhesive layer formed at least on one side of the substrate, and the pressure sensitive adhesive layer adsorbs 20 g/m2 or more of a solvent contained in the substance to be removed when the sheet is immersed in the solvent for 3 minutes. Another invented pressure-sensitive adhesive sheet for removal of a solvent-containing substance includes a substrate and a pressure sensitive adhesive layer formed at least on one side of the substrate, the pressure-sensitive adhesive layer absorbs 5 g/m2 or more of a solvent contained in the substance to be removed when the sheet is immersed in the solvent for 1 second, and the sheet after absorbing 5 g/m2 of the solvent has a tackiness of 1 cN/25-mm or more as determined by a method in conformity with JIS Z 0237.Type: ApplicationFiled: June 10, 2004Publication date: November 11, 2004Inventors: Tsuyoshi Hiramatsu, Atsushi Tani, Noriyuki Haba, Hideki Akamatsu
-
Publication number: 20040224150Abstract: An invented pressure-sensitive adhesive sheet for removal of a solvent-containing substance includes a substrate and a pressure sensitive adhesive layer formed at least on one side of the substrate, and the pressure sensitive adhesive layer adsorbs 20 g/m2 or more of a solvent contained in the substance to be removed when the sheet is immersed in the solvent for 3 minutes. Another invented pressure-sensitive adhesive sheet for removal of a solvent-containing substance includes a substrate and a pressure sensitive adhesive layer formed at least on one side of the substrate, the pressure-sensitive adhesive layer absorbs 5 g/m2 or more of a solvent contained in the substance to be removed when the sheet is immersed in the solvent for 1 second, and the sheet after absorbing 5 g/m2 of the solvent has a tackiness of 1 cN/25-mm or more as determined by a method in conformity with JIS Z 0237.Type: ApplicationFiled: June 10, 2004Publication date: November 11, 2004Inventors: Tsuyoshi Hiramatsu, Atsushi Tani, Noriyuki Haba, Hideki Akamatsu