Patents by Inventor Susumu Tanaka
Susumu Tanaka 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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Publication number: 20020064326Abstract: In a rolling bearing 1 comprising an outer ring 2, an inner ring 3, and a plurality of rolling elements 4 rollably provided interposed between the outer ring 2 and the inner ring 3, the outer ring 2 and the inner ring 3 are formed by an austenite-based stainless steel. Further, the outer ring 2 and the inner ring 3 are subjected to plastication attaining a percent area reduction of equal or more than 25% to have a surface hardness HRC of equal or more than 35.Type: ApplicationFiled: August 29, 2001Publication date: May 30, 2002Applicant: NSK LTD.Inventor: Susumu Tanaka
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Publication number: 20020061150Abstract: To provide a rolling bearing for a man-made satellite which is free from the damages, e.g., formation of the band mark on the surfaces of the rolling elements, and the losing of the luster of the surfaces thereof. There is provided a rolling bearing, which is used mainly for a man-made satellite, includes an outer ring, an inner ring, and rolling elements. The parent material of those components is martensitic stainless steel. Of those components, at least the rolling elements are processed to have nitride surface layers formed over their surfaces. A hardness of the nitride surface layer is Hv1200 to 1500.Type: ApplicationFiled: October 26, 2001Publication date: May 23, 2002Applicant: NSK LTD.Inventors: Kiyotoshi Ueda, Yukio Ohura, Susumu Tanaka
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Patent number: 6391455Abstract: The present invention relates to a liquid crystal display cell spacer with improved in coloring effect and light shielding effect and optimal electrical, physical, chemical, and optical properties and a liquid crystal display cell with use thereof. A liquid crystal display cell spacer comprising surface-coated carbon black; a liquid crystal display cell spacer comprising a pigment component comprising carbon black and at least one set of organic pigments of dissimilar colors other than carbon black; and a liquid crystal display cell spacer comprising a pigment component comprising surface-coated carbon black and at least one set of organic pigments of dissimilar colors other than carbon black. A liquid crystal display cell with use any of above liquid crystal display cell spacers.Type: GrantFiled: December 26, 2000Date of Patent: May 21, 2002Assignee: Sekisui Chemical Co., Ltd.Inventors: Susumu Tanaka, Kunikazu Yamada
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Publication number: 20020037120Abstract: The material of inner ring, outer ring and rolling element is formed by a steel material having a chromium (Cr) content of 5% by weight or more. The material is then subjected to cutting. Thereafter, the material thus cut is subjected to heat treatment so that the surface hardness HRC of the worked material is 58 or more. Subsequently, the worked material is subjected to grinding. A working denatured layer present on the surface of the worked material is then removed. Subsequently, an oxide film comprising chromium atom and iron atom at a ratio (Cr/Fe) of 0.5 or more is formed on the surface of the worked material. Accordingly, it is possible to provide a rolling bearing excellent in corrosion resistance and fretting resistance.Type: ApplicationFiled: May 31, 2001Publication date: March 28, 2002Applicant: NSK LTD.Inventors: Susumu Tanaka, Hiroyuki Ito
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Patent number: 6358333Abstract: An inexpensive rolling apparatus improved in resistance to fretting, acoustic performance, resistance to corrosion, life and workability is provided. At least one of an outer member, an inner member and rolling elements of the apparatus is formed of an alloy steel containing 1.5% by weight or less of C, 10% to 20% by weight of Cr, 0.1% to 0.8% by weight of Mn, 0.1% to 1.0% by weight of Si and less than 0.2% by weight of N, particularly, at least one of the outer member, the inner member and the rolling elements is formed of a martensitic stainless steel containing 0.6% by weight or less of C, 10% to 14% by weight of Cr, 0.1% to 0.8% by weight of Mn, 0.1% to 1.0% by weight of Si, less than 0.2% by weight of N, 0.5% by weight or less of Mo, 0.2% by weight or less of V, and Fe and inevitable components as the balance, wherein the relationship between the content of C and that of Cr satisfies C %≦−0.05 Cr %+1.Type: GrantFiled: May 24, 2000Date of Patent: March 19, 2002Assignee: NSK Ltd.Inventors: Susumu Tanaka, Kenji Yamamura, Manabu Obori
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Publication number: 20020012757Abstract: The present invention relates to a liquid crystal display cell spacer with improved in coloring effect and light shielding effect and optimal electrical, physical, chemical, and optical properties and a liquid crystal display cell with use thereof. A liquid crystal display cell spacer comprising surface-coated carbon black; a liquid crystal display cell spacer comprising a pigment component comprising carbon black and at least one set of organic pigments of dissimilar colors other than carbon black; and a liquid crystal display cell spacer comprising a pigment component comprising surface-coated carbon black and at least one set of organic pigments of dissimilar colors other than carbon black. A liquid crystal display cell with use any of above liquid crystal display cell spacers.Type: ApplicationFiled: December 26, 2000Publication date: January 31, 2002Applicant: Sekisui Chemical Co., LtdInventors: Susumu Tanaka, Kunikazu Yamada
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Publication number: 20010048781Abstract: A fine nitride layer comprising a compound layer and a diffusion hardened layer of hardness being Hv900 or higher is formed, through a low temperature nitriding method at temperature in the range of 300 to 400° C., in a guiding part. The guiding part guides the circumferential surfaces of retainers 7a to 7c and is formed at any one part of inner ring raceways 3a to 3c and outer ring raceways 4a to 4c as well as the inner circumferential surfaces of the outer rings 5a to 5c, to thereby realize such rolling bearings at low cost, having excellent abrasion resistance, and good corrosion resistance, if needed.Type: ApplicationFiled: May 25, 2001Publication date: December 6, 2001Applicant: NSK LTD.Inventors: Hisashi Kawamura, Yukio Ohura, Manabu Ohori, Susumu Tanaka
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Publication number: 20010047302Abstract: A panel displaying method of an order receiving POS terminal is used to receive an order for an article by a customer in, for example, a fast-food restaurant. The panel displaying method, wherein the POS terminal includes a display unit that displays a touch panel formed of plural keys operated when a customer orders an article comprises the step of pop-up displaying on the display unit the touch panel formed of keys each corresponding to an optional item when the article is ordered. The panel displaying method permits easy operation, registering optional items, and updating a menu with no troubles.Type: ApplicationFiled: July 16, 2001Publication date: November 29, 2001Applicant: Fujitsu LimitedInventors: Shinichi Yoshinaga, Susumu Tanaka
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Patent number: 6315455Abstract: The rolling bearing according to the invention comprises a dense nitride layer formed on the surface layer of the rolling elements and optionally an optimum carbonitride layer formed on the races. In this arrangement, the deterioration of durability due to vibration or impact load during transportation can be prevented, not to mention improvement of stillness. Further, the deterioration of impact resistance required for hybrid bearing can be prevented. The release of pilot pressure and defective of acoustic properties due to electrostatic attraction of dust can be prevented. At the same time, the rolling element of the invention comprises a compound layer having an extremely high hardness formed uniformly, making it possible to finish to a high precision. Moreover, a great effect can be exerted of preventing the change of properties with time at high temperature or the deterioration of acoustic properties under other severe working conditions.Type: GrantFiled: April 3, 2000Date of Patent: November 13, 2001Assignee: NSK Ltd.Inventors: Susumu Tanaka, Manabu Ohori
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Publication number: 20010035234Abstract: An inner ring and an outer ring are composed as follows. These members are fabricated with a steel for bearing containing carbon 0.6 wt % or higher. A carbonitrided layer is formed in a raceway surface. The amount of residual austenite at a position of 2% Da depth in the raceway surface is determined to be 1.0 vol % or lower. Hardness at the position of 2% Da depth is set to be HRC58 or more. Nitrogen content (Np) at the position of 2% Da depth is 0.05 wt % or more. A multiple Gd of an impression resistance expressed with the following formula (1) is 1.Type: ApplicationFiled: March 27, 2001Publication date: November 1, 2001Inventors: Shigeru Okita, Susumu Tanaka, Tomonobu Yoshikawa
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Patent number: 6278937Abstract: Disclosed is a system for controlling the position of a floating rig that permits holding the rig at a position optimum to an excavation riser even if a position signal of the floating rig is not received, provided that the angles of inclination at the upper and lower ends of the riser are detected. In the method of controlling the position of a floating rig, the floating rig 10 is joined to a well head 14 at the sea bottom by an excavation riser 16, and the rig 10 is driven to a corrected position by thrusters or a combination of thrusters and a propulsion system. A neural network is allowed to learn in advance the position information of the floating rig accompanying the behaving characteristics of the excavation riser.Type: GrantFiled: March 31, 2000Date of Patent: August 21, 2001Assignee: Mitsui Engineering & Shipbuilding Co., Ltd.Inventors: Shigeki Ishida, Susumu Tanaka
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Patent number: 6258189Abstract: Means for measuring deviation measures a vertical deviation of a green tire from circularity while the green tire is clamped by a green tire building drum. The green tire to be formed is shaped into a complete circle according to the measured value.Type: GrantFiled: January 6, 1999Date of Patent: July 10, 2001Assignee: Sumitomo Rubber Industries, Ltd.Inventors: Masayuki Sakamoto, Takuya Mizuta, Seiki Yamada, Kazuya Suzuki, Susumu Tanaka, Yukio Endo, Toshihiko Omokawa
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Patent number: 6248186Abstract: A ball-and-roller bearing is disclosed having an inner ring, an outer ring arranged on the axis of the inner ring and rotating around the co-axis relative to the inner ring, and a rolling body interposed between the inner ring and the outer ring and rolling with rotation of the outer ring relative to the inner ring. One of the inner ring, the outer ring, and the rolling body has a core member made from an alloy containing iron, at least one of 0.2 to 1.0% by weight of silicon and 0.2 to 1.5% by weight of manganese, 7.0 to 11.0% by weight of chromium, 1.5 to 6.0% by weight of molybdenum, and 0.5 to 8.0% by weight of cobalt, and a case hardened surface layer. Also disclosed is the method of manufacturing the bearing by forming a core member of the alloy, forming a case hardened layer containing 0.9 to 1.Type: GrantFiled: July 2, 1999Date of Patent: June 19, 2001Assignee: NSK Ltd.Inventors: Kenji Yamamura, Susumu Tanaka, Manabu Ohori
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Patent number: 6228184Abstract: An inexpensive rolling apparatus improved in resistance to fretting, acoustic performance, resistance to corrosion, life and workability is provided. At least one of an outer member, an inner member and rolling elements of the apparatus is formed of an alloy steel containing 1.5% by weight or less of C, 10% to 20% by weight of Cr, 0.1% to 0.8% by weight of Mn, 0.1% to 1.0% by weight of Si and less than 0.2% by weight of N, particularly, at least one of the outer member, the inner member and the rolling elements is formed of a martensitic stainless steel containing 0.6% by weight or less of C, 10% to 14% by weight of Cr, 0.1% to 0.8% by weight of Mn, 0.1% to 1.0% by weight of Si, less than 0.2% by weight of N, 0.5% by weight or less of Mo, 0.2% by weight or less of V, and Fe and inevitable components as the balance, wherein the relationship between the content of C and that of Cr satisfies C %≦−0.05 Cr %+1.Type: GrantFiled: May 24, 2000Date of Patent: May 8, 2001Assignee: NSK Ltd.Inventors: Susumu Tanaka, Kenji Yamamura, Manabu Obori
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Patent number: 6190774Abstract: The present invention relates to a liquid crystal display cell spacer with improved in coloring effect and light shielding effect and optimal electrical, physical, chemical, and optical properties and a liquid crystal display cell with use thereof. A liquid crystal display cell spacer comprising surface-coated carbon black; a liquid crystal display cell spacer comprising a pigment component comprising carbon black and at least one set of organic pigments of dissimilar colors other than carbon black; and a liquid crystal display cell spacer comprising a pigment component comprising surface-coated carbon black and at least one set of organic pigments of dissimilar colors other than carbon black. A liquid crystal display cell with use any of above liquid crystal display cell spacers.Type: GrantFiled: August 14, 1998Date of Patent: February 20, 2001Assignee: Sekisui Chemical Co., Ltd.Inventors: Susumu Tanaka, Kunikazu Yamada
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Patent number: 6171411Abstract: Disclosed is a rolling bearing comprising an inner race, an outer race, and a plurality of rolling elements, at least one of the inner race and the outer race being formed of an alloy steel which comprises: 0.7≦C≦0.9% by weight; 0.1≦Si≦0.5% by weight; 0.5≦Mn≦1.1% by weight; and 0.1≦Cr≦0.6% by weight; and including, in its surface layer, at least one of 0.8≦C≦1.4% by weight and 0.01≦N≦0.3% by weight. The rolling bearing can be obtained at an extremely low cost and has a long life in a severe environment particularly under contaminated lubrication.Type: GrantFiled: July 28, 1997Date of Patent: January 9, 2001Assignee: NSK Ltd.Inventors: Shigeru Okita, Susumu Tanaka
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Patent number: 6143425Abstract: A rolling device includes: an outer member; an inner member; and a plurality of rolling elements arranged between the outer and inner members, the outer member having a first contact surface which contacts the rolling elements, the inner member having a second contact surface which contacts the rolling elements, each of the rolling elements rolling against the first and second contact surfaces. At least one of the outer member, inner member, and rolling elements is formed of steel containing: C of less than 0.6 wt %; Cr of 10.0 wt % to 22.0 wt %; Mn of 0.1 wt % to 1.5 wt %; Si of 0.1 wt % to 2.0 wt %; N from 0.05 wt % to less than 0.2 wt %; Mo of 0 to 3.0 wt %, and V of 0 to 2.0 wt %; and the balance Fe and inevitable impurities, the steel satisfying C %+N %.gtoreq.0.45 wt %. The rolling device has excellent characteristics in fatigue strength, wear resistance, corrosion resistance, and acoustic characteristic.Type: GrantFiled: December 23, 1998Date of Patent: November 7, 2000Assignee: NSK Ltd.Inventors: Susumu Tanaka, Kenji Yamamura, Manabu Ohori
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Patent number: 6086686Abstract: An inexpensive rolling apparatus improved in resistance to fretting, acoustic performance, resistance to corrosion, life and workability is provided. At least one of an outer member, an inner member and rolling elements of the apparatus is formed of an alloy steel containing 1.5% by weight or less of C, 10% to 20% by weight of Cr, 0.1% to 0.8% by weight of Mn, 0.1% to 1.0% by weight of Si and less than 0.2% by weight of N, particularly, at least one of the outer member, the inner member and the rolling elements is formed of a martensitic stainless steel containing 0.6% by weight or less of C, 10% to 14% by weight of Cr, 0.1% to 0.8% by weight of Mn, 0.1% to 1.0% by weight of Si, less than 0.2% by weight of N, 0.5% by weight or less of Mo, 0.2% by weight or less of V, and Fe and inevitable components as the balance, wherein the relationship between the content of C and that of Cr satisfies C%.ltoreq.-0.05 Cr%+1.Type: GrantFiled: April 16, 1998Date of Patent: July 11, 2000Assignee: NSK Ltd.Inventors: Susumu Tanaka, Kenji Yamamura, Manabu Obori
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Patent number: 6071358Abstract: At least one of the components of a rolling member used in a manner in which it is rolled or slid with a mated member is made of carbon steel containing 0.8%-0.9% by weight of C, 0.1%-0.7% by weight of Si, 0.5%-1.1% by weight of Mn, and 0.1%-0.6% by weight of Cr and Fe substantially in the remaining part, wherein an ideal critical diameter DI value calculated from the compositions is 1.5-4.0, and the retained austenite amount after hardened heat treatment is 8%-22% by volume. The value DI is determined by the following equation:DI=(0.311.times.C %.sup.0.498).times.(0.7.times.Si %+1).times.(3.33.times.Mn %+1).times.(2.16.times.Type: GrantFiled: September 19, 1997Date of Patent: June 6, 2000Assignee: NSK Ltd.Inventors: Shigeru Okita, Susumu Tanaka, Manabu Ohori, Koji Ueda, Akihiro Kiuchi
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Patent number: 5998042Abstract: A rolling device includes: an outer member; an inner member; and a plurality of rolling elements arranged between the outer and inner members, the outer member having a first contact surface which contacts the rolling elements, the inner member having a second contact surface which contacts the rolling elements, each of the rolling elements rolling against the first and second contact surfaces. At least one of the outer member, inner member, and rolling elements is formed of steel containing: C of less than 0.6 wt %; Cr of 10.0 wt % to 22.0 wt %; Mn of 0.1 wt % to 1.5 wt %; Si of 0.1 wt % to 2.0 wt %; N from 0.05 wt % to less than 0.2 wt %; Mo of 0 to 3.0 wt %, and V of 0 to 2.0 wt %; and the balance Fe and inevitable impurities, the steel satisfying C %+N %.gtoreq.0.45 wt % and containing retained austenite of .ltoreq.6 vol %. The rolling device has excellent characteristics in fatigue strength, wear resistance, corrosion resistance, and acoustic characteristic.Type: GrantFiled: October 18, 1996Date of Patent: December 7, 1999Assignee: NSK Ltd.Inventors: Susumu Tanaka, Kenji Yamamura, Manabu Ohori