Patents by Inventor Naoki Kawada
Naoki Kawada 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: 10137547Abstract: A main spindle device for a machine tool includes a main spindle, a cushioning member, and an arithmetic unit. The cushioning member is disposed on a position where a vibration displacement of a rotator exists. The arithmetic unit uses data of a tool to be used to analyze a vibration mode in a free vibration of the rotator based on a support rigidity of a bearing, masses of respective parts of the rotator including the tool, an attenuation coefficient, and an equation of motion derived from rigidity and inertia by a rotation. An outer diameter of a sleeve positioned outside the bearing is changed such that a position of an antinode of the vibration or a position on which a vibration displacement exists in the vibration mode matches a position of the cushioning member inside the main spindle to change a preload on the bearing.Type: GrantFiled: June 22, 2017Date of Patent: November 27, 2018Assignee: Okuma CorporationInventors: Issei Koike, Naoki Kawada
-
Patent number: 10092988Abstract: A tool pot includes a resin-made pot body and a metallic reinforcing member embedded in the pot body by insert molding. The reinforcing member is provided with a reinforcing plate embedded in a portion including a horizontal pin insertion portion in the pot body. The reinforcing plate is provided with a lightening hole so as to avoid the horizontal pin insertion portion.Type: GrantFiled: October 30, 2015Date of Patent: October 9, 2018Assignee: OKUMA CORPORATIONInventor: Naoki Kawada
-
Patent number: 10081088Abstract: A main spindle failure detection device for a machine tool includes a rotation speed detection unit, a reach time estimation unit, and a determining unit. The reach time estimation unit is configured to estimate a reach time in which the rotation speed of the main spindle reaches a predetermined rotation speed threshold using a non-linear model based on a rotation speed of the main spindle detected at a start of an inertia operation and a rotation speed of the main spindle detected after an elapse of preset measurement time from the start of the inertia operation. The determining unit is configured to compare the reach time estimated by the reach time estimation unit with a preset reach time in which the rotation speed reaches the rotation speed threshold, so as to determine a failure in the main spindle based on a result of the comparison.Type: GrantFiled: September 16, 2016Date of Patent: September 25, 2018Assignee: Okuma CorporationInventors: Seiei Yamamoto, Naoki Kawada
-
Patent number: 9933333Abstract: A bearing diagnostic device senses a failure in a bearing of a machine tool including a rotation shaft device. The bearing diagnostic device includes a rotation counting unit, a temperature measuring unit, a frictional torque calculating unit, a rolling speed calculating unit, a bearing characteristic calculating unit, a storage unit, and a determination unit. The frictional torque calculating unit is configured to calculate a frictional torque of the rotation shaft device. The rolling speed calculating unit is configured to calculate a rolling speed of the bearing from the count of rotations. The bearing characteristic calculating unit is configured to calculate a bearing characteristic from the frictional torque and the rolling speed. The determination unit is configured to compare the bearing characteristic calculated by the bearing characteristic calculating unit with a reference bearing characteristic stored in the storage unit to determine a presence of a failure.Type: GrantFiled: July 14, 2016Date of Patent: April 3, 2018Assignee: Okuma CorporationInventors: Naoki Kawada, Issei Koike
-
Publication number: 20180021904Abstract: A main spindle device for a machine tool includes a main spindle, a cushioning member, and an arithmetic unit. The cushioning member is disposed on a position where a vibration displacement of a rotator exists. The arithmetic unit uses data of a tool to be used to analyze a vibration mode in a free vibration of the rotator based on a support rigidity of a bearing, masses of respective parts of the rotator including the tool, an attenuation coefficient, and an equation of motion derived from rigidity and inertia by a rotation. An outer diameter of a sleeve positioned outside the bearing is changed such that a position of an antinode of the vibration or a position on which a vibration displacement exists in the vibration mode matches a position of the cushioning member inside the main spindle to change a preload on the bearing.Type: ApplicationFiled: June 22, 2017Publication date: January 25, 2018Applicant: Okuma CorporationInventors: Issei KOIKE, Naoki Kawada
-
Publication number: 20170106487Abstract: A main spindle failure detection device for a machine tool includes a rotation speed detection unit, a reach time estimation unit, and a determining unit. The reach time estimation unit is configured to estimate a reach time in which the rotation speed of the main spindle reaches a predetermined rotation speed threshold using a non-linear model based on a rotation speed of the main spindle detected at a start of an inertia operation and a rotation speed of the main spindle detected after an elapse of preset measurement time from the start of the inertia operation. The determining unit is configured to compare the reach time estimated by the reach time estimation unit with a preset reach time in which the rotation speed reaches the rotation speed threshold, so as to determine a failure in the main spindle based on a result of the comparison.Type: ApplicationFiled: September 16, 2016Publication date: April 20, 2017Applicant: Okuma CorporationInventors: Seiei YAMAMOTO, Naoki KAWADA
-
Publication number: 20170067796Abstract: A bearing diagnostic device senses a failure in a bearing of a machine tool including a rotation shaft device. The bearing diagnostic device includes a rotation counting unit, a temperature measuring unit, a frictional torque calculating unit, a rolling speed calculating unit, a bearing characteristic calculating unit, a storage unit, and a determination unit. The frictional torque calculating unit is configured to calculate a frictional torque of the rotation shaft device. The rolling speed calculating unit is configured to calculate a rolling speed of the bearing from the count of rotations. The bearing characteristic calculating unit is configured to calculate a bearing characteristic from the frictional torque and the rolling speed. The determination unit is configured to compare the bearing characteristic calculated by the bearing characteristic calculating unit with a reference bearing characteristic stored in the storage unit to determine a presence of a failure.Type: ApplicationFiled: July 14, 2016Publication date: March 9, 2017Applicant: Okuma CorporationInventors: Naoki KAWADA, Issei KOIKE
-
Publication number: 20160121446Abstract: A tool pot includes a resin-made pot body and a metallic reinforcing member embedded in the pot body by insert molding. The reinforcing member is provided with a reinforcing plate embedded in a portion including a horizontal pin insertion portion in the pot body. The reinforcing plate is provided with a lightening hole so as to avoid the horizontal pin insertion portion.Type: ApplicationFiled: October 30, 2015Publication date: May 5, 2016Inventor: Naoki Kawada
-
Patent number: 7632813Abstract: The present invention relates to an agent for increasing BMD characterized by use of a cathepsin K inhibitor as a bone resorption inhibitor in combination with a type of PTH as a bone formation stimulator. This agent for increasing BMD is useful for the treatment of osteoporosis, bone fracture, arthritis, rheumatoid arthritis, osteoarthritis, hypercalcemia, osteometastasis of carcinoma, periodontal disease, bone Paget's disease and other bone metabolic diseases. For example, as the cathepsin K inhibitor, there can be mentioned a compound of formula (W) and a salt thereof, etc.Type: GrantFiled: April 25, 2005Date of Patent: December 15, 2009Assignee: Ono Pharmaceutical Co., Ltd.Inventors: Yasuo Ochi, Makoto Tanaka, Naoki Kawada, Hiroyuki Yamada, Hiroshi Mori, Ryouji Kayasuga
-
Publication number: 20070238769Abstract: The present invention relates to an agent for increasing BMD characterized by use of a cathepsin K inhibitor as a bone resorption inhibitor in combination with a type of PTH as a bone formation stimulator. This agent for increasing BMD is useful for the treatment of osteoporosis, bone fracture, arthritis, rheumatoid arthritis, osteoarthritis, hypercalcemia, osteometastasis of carcinoma, periodontal disease, bone Paget's disease and other bone metabolic diseases. For example, as the cathepsin K inhibitor, there can be mentioned a compound of formula (W) and a salt thereof, etc.Type: ApplicationFiled: April 25, 2005Publication date: October 11, 2007Applicant: ONO PHARMACEUTICAL CO., LTD.Inventors: Yasuo Ochi, Makoto Tanaka, Naoki Kawada, Hiroyuki Yamada, Hiroshi Mori, Ryouji Kayasuga
-
Publication number: 20070197510Abstract: The present invention relates to a compound of formula (I) wherein Y and Z each is independently N or C; ring A is a carbocyclic group or a heterocyclic group; ring B is a heterocyclic group containing at least one nitrogen atom; R is a hydrogen atom, a substitutent, etc.; n is 0, or an integer of from 1 to 10, a salt thereof, a solvate thereof, or an N-oxide thereof, or a prodrug thereof. The compound of formula (I), a salt thereof, a solvate thereof, or an N-oxide thereof, or a prodrug thereof has an inhibitory activity against cysteine protease, and it is useful for the prophylaxis and/or treatment of a cysteine protease-related disease such as osteoporosis, etc.Type: ApplicationFiled: March 9, 2005Publication date: August 23, 2007Inventors: Kazuyuki Ohmoto, Katsuya Hisaichi, Motohiro Okuma, Makoto Tanaka, Naoki Kawada
-
Publication number: 20020064847Abstract: Secondary alcohol dehydrogenase having broad specificity to substrates and high stereoselectivity is provided. By reducing ketones using the enzyme, alcohols, particularly, optically active alcohols are efficiently produced. Ketones are also efficiently produced by oxidizing alcohols using the enzyme.Type: ApplicationFiled: October 1, 1998Publication date: May 30, 2002Applicant: DAICEL CHEMICAL INDUSTRIES, LTD.Inventors: HIROAKI YAMAMOTO, NAOKI KAWADA, AKINOBU MATSUYAMA
-
Patent number: 6255092Abstract: The present invention provides a novel secondary alcohol dehydrogenase useful for the synthesis of optically active alcohol and DNA encoding said enzyme. A microorganism belonging to genus Candida was found to produce a novel secondary alcohol dehydrogenase with a high stereochemical specificity. Using said enzyme, optically active alcohols were prepared, and by cloning of DNA encoding said enzyme, the base sequence of said DNA was determined. By providing a novel secondary alcohol dehydrogenase with a high stereochemical specificity and the gene encoding said enzyme, an efficient production of optically active alcohols became possible.Type: GrantFiled: June 11, 1997Date of Patent: July 3, 2001Assignee: Daicel Chemical Industries Ltd.Inventors: Tomoko Kojima, Hiroaki Yamamoto, Naoki Kawada, Akinobu Matsuyama
-
Patent number: 6027926Abstract: Optically active 1,2,4-butanetriol of high optical purity can be produced economically and simply using a microorganism capable of increasing the content of (S)-1,2,4-butanetriol or (R)-1,2,4-butanetriol by acting on a mixture of enantiomers of 1,2,4-butanetriol.Type: GrantFiled: May 14, 1998Date of Patent: February 22, 2000Assignee: Daicel Chemical Industries, Ltd.Inventors: Naoki Kawada, Rika Kinase
-
Patent number: 5874613Abstract: Tyrosine decarboxylase, or microorganisms of the genuses Enterococcus, Lactobacillus, Providencia, Fusarium, and Gibberella were reacted with a mixture of the enantiomers of threo-3-phenylserine or its halogen substitution products to produce (R)-2-amino-1-phenylethanol or its halogen substitution products. At the same time, one of the enantiomers of threo-3-phenylserine or its halogen substitution products were selectively left, and optically active threo-3-phenylserine or its halogen substitution products were produced. In addition, a novel material of 3-(3-chlorophenyl)serine, which is a substrate of the reaction in the present invention, was produced. (R)-2-amino-1-phenylethanol or its halogen substitution products, and optically active threo-3-phenylserine or its halogen substitution products can economically be produced on an industrial scale.Type: GrantFiled: April 22, 1997Date of Patent: February 23, 1999Assignee: Daicel Chemical Industries, Ltd.Inventors: Teruyuki Nikaido, Naoki Kawada, Takeshi Hamatani, Yoichiro Ueda
-
Patent number: 5846792Abstract: Tyrosine decarboxylase, or microorganisms of the genuses Enterococcus, Lactobacillus, Providencia, Fusarium, and Gibberella were reacted with a mixture of the enantiomers of threo-3-phenylserine or its halogen substitution products to produce (R)-2-amino-1-phenylethanol or its halogen substitution products. At the same time, one of the enantiomers of threo-3-phenylserine or its halogen substitution products were selectively left, and optically active threo-3-phenylserine or its halogen substitution products were produced. In addition, a novel material of 3-(3-chlorophenyl)serine, which is a substrate of the reaction in the present invention, was produced. (R)-2-amino-1-phenylethanol or its halogen substitution products, and optically active threo-3-phenylserine or its halogen substitution products can economically be produced on an industrial scale.Type: GrantFiled: April 22, 1997Date of Patent: December 8, 1998Assignee: Daicel Chemical Industries, Ltd.Inventors: Teruyuki Nikaido, Naoki Kawada, Takeshi Hamatani, Yoichiro Ueda
-
Patent number: 5763236Abstract: The present invention provides a novel secondary alcohol dehydrogenase useful for the synthesis of optically active alcohol and DNA encoding said enzyme. A microorganism belonging to genus Candida was found to produce a novel secondary alcohol dehydrogenase with a high stereochemical specificity. Using said enzyme, optically active alcohols were prepared, and by cloning of DNA encoding said enzyme, the base sequence of said DNA was determined. By providing a novel secondary alcohol dehydrogenase with a high stereochemical specificity and the gene encoding said enzyme, an efficient production of optically active alcohols became possible.Type: GrantFiled: September 12, 1996Date of Patent: June 9, 1998Assignee: Daicel Chemical Industries Ltd.Inventors: Tomoko Kojima, Hiroaki Yamamoto, Naoki Kawada, Akinobu Matsuyama
-
Patent number: 5731175Abstract: Tyrosine decarboxylase, or microorganisms of the genuses Enterococcus, Lactobacillus, Providencia, Fusarium, and Gibberella were reacted with a mixture of the enantiomers of threo-3-phenylserine or its halogen substitution products to produce (R)-2-amino-1-phenylethanol or its halogen substitution products. At the same time, one of the enantiomers of threo-3-phenylserine or its halogen substitution products were selectively left, and optically active threo-3-phenylserine or its halogen substitution products were produced. In addition, a novel material of 3-(3-chlorophenyl)serine, which is a substrate of the reaction in the present invention, was produced. (R)-2-amino-1-phenylethanol or its halogen substitution products, and optically active threo-3-phenylserine or its halogen substitution products can economically be produced on an industrial scale.Type: GrantFiled: August 29, 1996Date of Patent: March 24, 1998Assignee: Daicel Chemical Industries, Ltd.Inventors: Teruyuki Nikaido, Naoki Kawada, Takeshi Hamatani, Yoichiro Ueda
-
Patent number: 5702928Abstract: A process for the asymmetric synthesis of a compound represented by general formula (II-R) easily at a low cost by using a lipase, and a process for producing a compound to be utilized in the above synthesis.Type: GrantFiled: May 28, 1996Date of Patent: December 30, 1997Assignee: Daicel Chemical Industries, Ltd.Inventors: Naoki Kawada, Noritsugu Yamazaki, Takafumi Imoto, Kiyoshi Ikura
-
Patent number: D762253Type: GrantFiled: January 27, 2012Date of Patent: July 26, 2016Assignee: JAPAN TRANSPORT ENGINEERING COMPANYInventors: Takeshi Ishikawa, Ai Masuda, Naoki Kawada, Kenji Hashimoto, Shigeki Matsuoka