Patents by Inventor Kazuo Maeda
Kazuo Maeda 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: 20130187170Abstract: Provided is a method for producing inexpensive and high-quality aluminum nitride crystals. Gas containing N atoms is introduced into a melt of a Ga—Al alloy, whereby aluminum nitride crystals are made to epitaxially grow on a seed crystal substrate in the melt of the Ga—Al alloy. A growth temperature of aluminum nitride crystals is set at not less than 1000 degrees C. and not more than 1500 degrees C., thereby allowing GaN to be decomposed into Ga metal and nitrogen gas.Type: ApplicationFiled: July 14, 2011Publication date: July 25, 2013Applicants: TOHOKU UNIVERSITY, SUMITOMO METAL MINING CO., LTD.Inventors: Hiroyuki Fukuyama, Masayoshi Adachi, Akikazu Tanaka, Kazuo Maeda
-
Patent number: 8366212Abstract: The crawler-type travel device includes a plurality of shoe plates, a first link section, a rotational wheel, and a shaft. The rotational wheel includes a first roller and a second roller. The first roller makes contact with first end portions corresponding to axial outer ends of the first link members forming the first link section. The second roller is aligned with and disposed on the axial inner side of the first roller. The second roller is rotatable independently from the first roller. The second roller makes contact with second end portions corresponding to axial inner ends of the first link members.Type: GrantFiled: January 16, 2009Date of Patent: February 5, 2013Assignee: Komatsu Ltd.Inventors: Kazuo Maeda, Masatake Tamaru
-
Publication number: 20120298347Abstract: There is provided an air-conditioning system in which at least one or some of a plurality of air-conditioning apparatuses are each controllable such that the indoor temperature is maintained between two set temperatures. All the plurality of air-conditioning apparatuses are switched to either one of heating operation and cooling operation on the basis of a temperature difference between the indoor temperature related to an air-conditioning apparatus that is in the first operation mode and a set target temperature and a temperature difference between the indoor temperature related to an air-conditioning apparatuses that is in the second operation mode and an upper temperature limit or a lower temperature limit.Type: ApplicationFiled: February 17, 2010Publication date: November 29, 2012Applicant: Mitsubishi Electric CorporationInventors: Kazuo Maeda, Toshihiro Ishikawa
-
Publication number: 20110211922Abstract: A ball end mill in which a ball end cutting edge (3) has a convex shape in a tool rotation direction with respect to a line connecting a rotation center (O) and a radially outer end (3o) of the ball end cutting edge (3), in a front view of the tool. In the ball end mill, a rake angle (?) of each portion of the ball end cutting edge (3) is set in a range from ?10° to 0°, and the negative value of the rake angle (?) is increased from a tip of the ball end cutting edge (3) and a radially outer end (3o) of the ball end cutting edge (3) toward a middle point in the radial direction, and is maximized at approximately the middle point in the radial direction.Type: ApplicationFiled: October 21, 2009Publication date: September 1, 2011Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.Inventors: Kazuo Maeda, Kouji Tominaga
-
Patent number: 7946662Abstract: A track shoe connecting link 25 has shaft holes 31, 32 at both end portions. In the track shoe connecting link 25, a plurality of insertion holes 39 are formed between the shaft holes 31, 32, and window holes 40, 41 are formed so as to correspond to each insertion hole 39. A bolt 43 is inserted through each of the insertion holes 39 and a nut 44 is screwed onto a distal end of the bolt 43 in each of the window holes 40, 41. Accordingly, the track shoe connecting link 25 is fixed to a track shoe 26. The area of the window hole 41 that is adjacent to the second shaft hole 32 is greater than the area of the window hole 40. Accordingly, the rigidity of the track shoe connecting link 25 becomes smaller toward the second shaft hole 32.Type: GrantFiled: April 13, 2007Date of Patent: May 24, 2011Assignee: Komatsu Ltd.Inventor: Kazuo Maeda
-
Patent number: 7878739Abstract: A cubic boron nitride radius end mill includes a sintered cubic boron nitride compact bonded to an end of a main body, and a cutting edge provided on the sintered cubic boron nitride compact. The wedge angle ?t of the cutting edge is constant over the entire region of the cutting edge. A negative rake face is disposed on a face so as to extend over the entire region of the cutting edge, and the rake angle ?n of the negative rake face satisfies the relationship ?30°??n??50°. A joint cutting edge is disposed between an end cutting edge and a radius cutting edge in the cutting edge, the joint cutting edge having a concave angle ?0 which is smaller than the concave angle ?1 of the end cutting edge and which satisfies the relationship 0.5°??0?2°.Type: GrantFiled: March 31, 2009Date of Patent: February 1, 2011Assignee: Sumitomo Electric Hardmetal Corp.Inventor: Kazuo Maeda
-
Publication number: 20100270856Abstract: The crawler-type travel device includes a plurality of shoe plates, a first link section, a rotational wheel, and a shaft. The rotational wheel includes a first roller and a second roller. The first roller makes contact with first end portions corresponding to axial outer ends of the first link members forming the first link section. The second roller is aligned with and disposed on the axial inner side of the first roller. The second roller is rotatable independently from the first roller. The second roller makes contact with second end portions corresponding to axial inner ends of the first link members.Type: ApplicationFiled: January 16, 2009Publication date: October 28, 2010Applicant: KOMATSU LTD.Inventors: Kazuo Maeda, Masatake Tamaru
-
Patent number: 7815262Abstract: A track chain assembly (22) has a track shoe (25) and a pair of parallel links (26) that are fixed to a non ground-engaging surface of the track shoe (25) with bolts (36). A connecting shaft (27) is fixed to shaft holes (31) that are provided on end portions each of which is included in the links (26). A reinforcing member (48) connects the links (26) with the bolts (36) so as to reinforce an open side between the links (26). Therefore, the links (26) are prevented from being damaged due to concentration of stress on a specific portion of each link (26).Type: GrantFiled: April 23, 2007Date of Patent: October 19, 2010Assignee: Komatsu Ltd.Inventor: Kazuo Maeda
-
Publication number: 20100196108Abstract: It is an object of the present invention to effectively suppress the occurrence of burrs in machining of a fiber-reinforced composite material, etc., using an end mill. An end mill includes first cutting edges 4 which spiral in a direction defining a positive helix angle and second cutting edges 5 which spiral in a direction defining a negative helix angle, the first cutting edges 4 and the second cutting edges 5 being disposed at positions shifted in a circumferential direction. The first cutting edges 4 and the second cutting edges 5 are each configured to be continuous over an effective cutting edge length, and at a tool top, a phase angle P1 between one of the first cutting edges 4 and its adjacent second cutting edge 5 located toward the back in a tool rotation direction is set to be different from a phase angle P2 between the second cutting edge 5 and its adjacent first cutting edge 4 located toward the back in the tool rotation direction.Type: ApplicationFiled: March 23, 2009Publication date: August 5, 2010Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.Inventors: Hisao Oka, Tatsuya Shino, Kazuo Maeda
-
Publication number: 20100166510Abstract: A tool has a shank and a cutting blade mounted on the shank. The tool also includes an internal fluid passage for drawing in, together with air, chips produced when the cutting blade machines a workpiece. The internal fluid passage comprises a through hole made in the shank, at least one main inlet hole for drawing in the chips together with the air, the main inlet hole being made in the cutting blade and being in fluid communication with the through hole, and at least one sub-inlet hole for drawing in at least the air, the sub-inlet hole being made in the shank and being in fluid communication with the through hole. The chips can efficiently be discharged from the tool without being deposited in the internal fluid passage, by the air which flows at a suitable speed through the internal fluid passage and draws the chips, regardless of the diameter of the tool.Type: ApplicationFiled: December 23, 2009Publication date: July 1, 2010Applicants: MORI SEIKI CO., LTD., SUMITOMO ELECTRIC HARDMETAL CORP.Inventors: Yasuhiro INAMASU, Morihiro HIDETA, Kazuo MAEDA, Hideo MORI
-
Patent number: 7661774Abstract: In a track with a rotatable bushing which is brought into engagement with a sprocket of a track-type vehicle, it is intended that strength is enhanced rationally by link functionality sharing and by combination of such assigned functional tasks for achieving further improvements in rotatable bushing function. To this end, a first bolt insertion hole provided in a track shoe mount surface of an external link and a second bolt insertion hole provided in a track shoe mount surface of an internal link are arranged on the same straight line, and a straight line connecting the first bolt insertion hole and the second bolt insertion hole is situated at a position more interior than a contact plane of the external link and internal link.Type: GrantFiled: September 4, 2007Date of Patent: February 16, 2010Assignee: Komatsu, Ltd.Inventors: Teiji Yamamoto, Kazuo Maeda
-
Publication number: 20090245946Abstract: A cubic boron nitride radius end mill includes a sintered cubic boron nitride compact bonded to an end of a main body, and a cutting edge provided on the sintered cubic boron nitride compact. The wedge angle ?t of the cutting edge is constant over the entire region of the cutting edge. A negative rake face is disposed on a face so as to extend over the entire region of the cutting edge, and the rake angle ?n of the negative rake face satisfies the relationship ?30°??n??50°. A joint cutting edge is disposed between an end cutting edge and a radius cutting edge in the cutting edge, the joint cutting edge having a concave angle ?0 which is smaller than the concave angle ?1 of the end cutting edge and which satisfies the relationship 0.5°??0 ?2°.Type: ApplicationFiled: March 31, 2009Publication date: October 1, 2009Applicant: SUMITOMO ELECTRIC HARDMETAL CORP.Inventor: Kazuo Maeda
-
Publication number: 20090066154Abstract: A first assembly 22A has two first links 25 that are parallel to each other and a second assembly 22B has two second links 28 that are parallel to each other. Sleeves 30 that are provided at both end portions of the second assembly 22B are externally fitted to support shafts 27 that are provided at both end portions of the first assembly 22A, respectively. When the total number of the assemblies is odd, a third assembly 22C is arranged between the first assembly 22A and the second assembly 22B. The sleeve 30 of the second assembly 22B is externally fitted to the support shaft 27 of the third assembly 22C and the sleeve 30 of the third assembly 22C is externally fitted to the support shaft 27 of the first assembly 22A. Therefore, even if the total number of the assemblies for the crawler belt is odd, the crawler belt of a parallel-link type can be applied.Type: ApplicationFiled: April 10, 2007Publication date: March 12, 2009Applicant: KOMATSU LTD.Inventor: Kazuo Maeda
-
Publication number: 20090045674Abstract: A track chain assembly (22) has a track shoe (25) and a pair of parallel links (26) that are fixed to a non ground-engaging surface of the track shoe (25) with bolts (36). A connecting shaft (27) is fixed to shaft holes (31) that are provided on end portions each of which is included in the links (26). A reinforcing member (48) connects the links (26) with the bolts (36) so as to reinforce an open side between the links (26). Therefore, the links (26) are prevented from being damaged due to concentration of stress on a specific portion of each link (26).Type: ApplicationFiled: April 23, 2007Publication date: February 19, 2009Applicant: KOMATSU LTD.Inventor: Kazuo Maeda
-
Publication number: 20090026836Abstract: A track shoe connecting link 25 has shaft holes 31, 32 at both end portions. In the track shoe connecting link 25, a plurality of insertion holes 39 are formed between the shaft holes 31, 32, and window holes 40, 41 are formed so as to correspond to each insertion hole 39. A bolt 43 is inserted through each of the insertion holes 39 and a nut 44 is screwed onto a distal end of the bolt 43 in each of the window holes 40, 41. Accordingly, the track shoe connecting link 25 is fixed to a track shoe 26. The area of the window hole 41 that is adjacent to the second shaft hole 32 is greater than the area of the window hole 40. Accordingly, the rigidity of the track shoe connecting link 25 becomes smaller toward the second shaft hole 32.Type: ApplicationFiled: April 13, 2007Publication date: January 29, 2009Applicant: KOMATSU LTDInventor: Kazuo Maeda
-
Publication number: 20080164756Abstract: In a track with a rotatable bushing which is brought into engagement with a sprocket of a track-type vehicle, it is intended that strength is enhanced rationally by link functionality sharing and by combination of such assigned functional tasks for achieving further improvements in rotatable bushing function. To this end, a first bolt insertion hole provided in a track shoe mount surface of an external link and a second bolt insertion hole provided in a track shoe mount surface of an internal link are arranged on the same straight line, and a straight line connecting the first bolt insertion hole and the second bolt insertion hole is situated at a position more interior than a contact plane of the external link and internal link.Type: ApplicationFiled: September 4, 2007Publication date: July 10, 2008Applicant: KOMATSU, LTD.Inventors: Teiji Yamamoto, Kazuo Maeda
-
Patent number: 7329612Abstract: A semiconductor device is manufactured by the steps of generating a film forming gas by setting a flow rate ratio of H2O to any one of a silicon-contained organic compound having a siloxane bond and a silicon-contained organic compound having a CH3 group to 4 or more and adjusting a gas pressure to 1.5 Torr or more, applying a power to the film forming gas to generate a plasma thereof so as to react it, and thus forming a low-dielectric insulating film (62) on a substrate (61), plasmanizing a process gas containing at least any one of He, Ar, H2 or deuterium, and bringing the low-dielectric insulating film (62) into contact with the plasma of the process gas.Type: GrantFiled: October 20, 2003Date of Patent: February 12, 2008Assignee: Semiconductor Process Laboratory Co., Ltd.Inventors: Yoshimi Shioya, Yuhko Nishimoto, Kazuo Maeda
-
Patent number: 7325889Abstract: In a track with a rotatable bushing which is brought into engagement with a sprocket of a track-type vehicle, it is intended that strength is enhanced rationally by link functionality sharing and by combination of such assigned functional tasks for achieving further improvements in rotatable bushing function. To this end, a track link comprises a combination of an external link and an internal link; a coupler pin hole is provided through the external link; a bushing hole is provided through the internal link, and the thickness dimension of a bushing hole formation part of the internal link is made greater than that of a coupler pin formation part of the external link.Type: GrantFiled: December 5, 2003Date of Patent: February 5, 2008Assignee: Komatsu LtdInventors: Teiji Yamamoto, Kazuo Maeda
-
Patent number: 7281884Abstract: A throw-away insert includes: an upper surface; a bottom surface; two side surfaces formed with upper side surfaces and lower side surfaces; two end surfaces; four nose sections formed at the corners of the upper surface; a main cutting section formed from a ridge line positioned at the intersection between the upper side surface and the upper surface; a secondary cutting section formed from a linear ridge line positioned at the intersection between the end surface and the upper surface; and an axial support surface formed from a section of the end surface. The upper side surface is projected outward more than the lower side surface.Type: GrantFiled: August 7, 2006Date of Patent: October 16, 2007Assignee: Sumitomo Electric Hardmetal, Corp.Inventor: Kazuo Maeda
-
Patent number: 7261497Abstract: A throw-away insert includes: an upper and bottom surface; two side surfaces; two end surfaces; a main cutting section formed from a ridge line positioned at the intersection between the side surfaces and the upper surface; a secondary cutting section formed from a ridge line positioned at the intersection between the end surfaces and the upper surface; an axial support surface supported by an insert pocket of a cutter body; and noses formed at the corners of the upper surface. The corner angles of the noses when seen from above are essentially right angles. The axial support surface is formed as a section of the end surface. The secondary cutting section is parallel to the ridge line at the upper end of the axial support surface and the bottom surface. The upper end of the axial support surface is positioned so that it is projected more in the direction of the longitudinal axis of the main cutting section than the ridge line of the upper end.Type: GrantFiled: August 4, 2006Date of Patent: August 28, 2007Assignee: Sumitomo Electric Hardmetal Corp.Inventor: Kazuo Maeda