Patents by Inventor Takehiro Nakagawa
Takehiro Nakagawa 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: 20150115543Abstract: An oil seal includes a bidirectional thread formed by the combination of a normal thread and a reverse thread and including ship-bottom-shaped threads as the threads, in which sealing performance by the thread can be improved. A normal thread and a reverse thread that exhibit a pumping action on a sealing fluid are provided side by side on the circumference on an atmospheric-side surface of a seal lip sliding portion. The normal thread and an reverse thread are respectively threads in which a parallel thread that begins from a lip tip and a ship-bottom-shaped thread continuous with the parallel thread are integrally continuous.Type: ApplicationFiled: September 30, 2014Publication date: April 30, 2015Inventor: Takehiro NAKAGAWA
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Patent number: 8714561Abstract: To improve durability of a seal lip (4) of an oil seal (1) in slidably contact with the peripheral surface of a shaft (23), a lubricating oil supply section (11) for collecting adhered oil and dropping it on the shaft (23) is provided at a forward end portion of an installation section (2), the lubricating oil supply section (11) has projections (12) formed on the inner peripheral surface of the installation section (2) to collect oil on the surface thereof, the surface of each projection (12) has a recess (13) for temporarily accumulating oil, guidance projections, or a slope for collecting the oil, and dams are formed on a forward end face (2a) of the installation section (2) to block the oil flowing down along the circumferential direction on the forward end face (2a) and guides the oil toward each projection (12).Type: GrantFiled: October 31, 2011Date of Patent: May 6, 2014Assignee: Nok CorporationInventors: Satoshi Yamanaka, Takehiro Nakagawa, Masayuki Tanida, Hideharu Hyakutake, Hiroki Matsui, Hideyuki Furuyama, Go Kanzaki, Shinya Takeda, Kei Sasaki, Akira Yamaguchi
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Patent number: 8714562Abstract: A lip type end face sealing device having excellent sealability to different kinds of liquids on both sides in the axial direction and having excellent durability. A case is tight fitted to an inner peripheral face of a housing and includes case members. One pair of seal lips is integrally fitted to inner peripheral flange parts, positioned oppositely each other in the axial direction, and opened in a tapered shape. One pair of the seal lips is slidably contacted with flange parts of slingers tight fitted to an outer periphery of a rotary shaft. Pressure in seal internal spaces between the seal lips is released through a vent hole.Type: GrantFiled: August 18, 2010Date of Patent: May 6, 2014Assignee: NOK CorporationInventors: Takehiro Nakagawa, Akihiro Sato, Tetsuo Tasaki, Hiromi Takahashi, Junya Hoshi, Hiroshi Okubo, Masahiro Anzai
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Patent number: 8573601Abstract: To prevent muddy water intrusion into a sliding section (S1) of an oil seal lip (13), a sealing device (1) has an oil seal (10) mounted at an opening end (2a) of a housing (2) and a slinger (20) mounted axially outside the oil seal (10) on a rotating body (5), the oil seal (10) is formed from a rubber-like elastic material integrally with a metal reinforcement ring (11) and has the oil seal lip (13) slidably contacting with the outer peripheral surface of the rotating body (5) and a side lip (15) slidably contacting with the slinger (20), the reinforcement ring (11) has a sliding tube section (11b) radially outside a sliding section (S2) of the side lip (15), and a external seal lip (23) provided on a radially outer section (22a) of the slinger (20) slidably contacts with the outer peripheral surface of the sliding tube section (11b).Type: GrantFiled: December 2, 2008Date of Patent: November 5, 2013Assignee: NOK CorporationInventor: Takehiro Nakagawa
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Patent number: 8537209Abstract: An endoscope device in which endoscope images and patient information can be recorded in a removable storage medium and in which the endoscope images and patient information recorded in the storage medium can be reproduced. The endoscope device has a selection means for reproducing the endoscope images in a list form and selecting at least one endoscope image from the reproduced list; a display means for inputting additional information other than the patient information, adding the additional information to the endoscope image selected by the selection means, and displaying the result; and a recording/reproduction means for recording the selected endoscope image and the additional information in the storage medium or reproducing the image and the information.Type: GrantFiled: November 25, 2005Date of Patent: September 17, 2013Assignee: Olympus CorporationInventors: Tomoki Iwasaki, Tsutomu Hirai, Susumu Hashimoto, Katsuyuki Saito, Takehiro Nakagawa
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Patent number: 8474825Abstract: To improve sealing performance, a sealing device comprises an oil seal (10) mounted to a non-rotating housing (2), and a dust cover (20) mounted to a rotating body (5) outside the oil seal (10), one of the oil seal (10) and the dust cover (20) facing each other has an external seal lip (24) slidably in close contact with the other of them (10, 20) outside the slide sections (S1, S2) between the oil seal (10) and the rotating body (5), the oil seal (10) and the dust cover (20) have non-contact lips (16, 25) which are positioned outside the slide sections (S1, S2) and inside the external seal lip (24), have substantially conical tubular shapes becoming larger in diameter toward the tips thereof, and are loosely inserted to each other, and a labyrinth seal (30) is provided at the outer diameter side of the external seal lip (24).Type: GrantFiled: October 6, 2009Date of Patent: July 2, 2013Assignee: NOK CorporationInventor: Takehiro Nakagawa
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Patent number: 8276917Abstract: A sealing device in which oil (O) is supplied by ejection to a sealing device body (3). In the sealing device, an increase in friction of a seal lip (33) caused by the pressure of the oil (O) is prevented, and effective lubrication by the oil (O) is promoted. The sealing device has the sealing device body (3) having the seal lip (33) slidably in intimate contact with the outer peripheral surface of a rotating shaft (2), an oil ejection opening (12) for ejecting the oil (O) toward a position on the outer peripheral side of the seal lip (33) of the sealing device body (3), and oil splashing means (4) for splashing the oil (O), ejected from the ejection opening (12), back to a portion near a sliding portion (S) of the seal lip (33).Type: GrantFiled: January 24, 2008Date of Patent: October 2, 2012Assignee: NOK CorporationInventors: Takehiro Nakagawa, Hideharu Hyakutake
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Patent number: 8220803Abstract: To improve durability of a seal lip (4) of an oil seal (1) in slidably contact with the peripheral surface of a shaft (23), a lubricating oil supply section (11) for collecting adhered oil and dropping it on the shaft (23) is provided at a forward end portion of an installation section (2), the lubricating oil supply section (11) has projections (12) formed on the inner peripheral surface of the installation section (2) to collect oil on the surface thereof, the surface of each projection (12) has a recess (13) for temporarily accumulating oil, guidance projections, or a slope for collecting the oil, and dams are formed on a forward end face (2a) of the installation section (2) to block the oil flowing down along the circumferential direction on the forward end face (2a) and guides the oil toward each projection (12).Type: GrantFiled: October 31, 2011Date of Patent: July 17, 2012Assignee: NOK CorporationInventors: Satoshi Yamanaka, Takehiro Nakagawa, Masayuki Tanida, Hideharu Hyakutake, Hiroki Matsui, Hideyuki Furuyama, Go Kanzaki, Shinya Takeda, Kei Sasaki, Akira Yamaguchi
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Patent number: 8189041Abstract: An endoscope signal processing apparatus has a first video signal generating circuit and a second video signal generating circuit which respectively generate a first video signal and a second video signal offering different resolutions depending on a first image capturing device and a second image capturing device respectively which are mounted in an endoscope removably connected to an endoscope connecting portion. The first and second video signals can be selectively output to an exterior through a common video signal output connector.Type: GrantFiled: February 1, 2007Date of Patent: May 29, 2012Assignee: Olympus CorporationInventors: Jun Konishi, Kentaro Hase, Tsutomu Hirai, Shoichi Amano, Tomoki Iwasaki, Katsuyuki Saito, Makoto Tsunakawa, Takehiro Nakagawa
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Publication number: 20120086173Abstract: To improve durability of a seal lip (4) of an oil seal (1) in slidably contact with the peripheral surface of a shaft (23), a lubricating oil supply section (11) for collecting adhered oil and dropping it on the shaft (23) is provided at a forward end portion of an installation section (2), the lubricating oil supply section (11) has projections (12) formed on the inner peripheral surface of the installation section (2) to collect oil on the surface thereof, the surface of each projection (12) has a recess (13) for temporarily accumulating oil, guidance projections, or a slope for collecting the oil, and dams are formed on a forward end face (2a) of the installation section (2) to block the oil flowing down along the circumferential direction on the forward end face (2a) and guides the oil toward each projection (12).Type: ApplicationFiled: October 31, 2011Publication date: April 12, 2012Inventors: Satoshi Yamanaka, Takehiro Nakagawa, Masayuki Tanida, Hideharu Hyakutake, Hiroki Matsui, Hideyuki Furuyama, Go Kanzaki, Shinya Takeda, Kei Sasaki, Akira Yamaguchi
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Publication number: 20120080855Abstract: To improve durability of a seal lip (4) of an oil seal (1) in slidably contact with the peripheral surface of a shaft (23), a lubricating oil supply section (11) for collecting adhered oil and dropping it on the shaft (23) is provided at a forward end portion of an installation section (2), the lubricating oil supply section (11) has projections (12) formed on the inner peripheral surface of the installation section (2) to collect oil on the surface thereof, the surface of each projection (12) has a recess (13) for temporarily accumulating oil, guidance projections, or a slope for collecting the oil, and dams are formed on a forward end face (2a) of the installation section (2) to block the oil flowing down along the circumferential direction on the forward end face (2a) and guides the oil toward each projection (12).Type: ApplicationFiled: October 31, 2011Publication date: April 5, 2012Inventors: Satoshi Yamanaka, Takehiro Nakagawa, Masayuki Tanida, Hideharu Hyakutake, Hiroki Matsui, Hideyuki Furuyama, Go Kanzaki, Shinya Takeda, Kei Sasaki, Akira Yamaguchi
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Patent number: 8136818Abstract: A seal lip of an oil seal is in slidable contact with a peripheral surface of a shaft. A lubricating oil supply section for collecting adhered oil and dropping it on the shaft is provided at a forward end portion of an installation section. The lubricating oil supply section has projections formed on the inner peripheral surface of the installation section to collect oil on the surface thereof. The surface of each projection has a recess for temporarily accumulating oil. Guidance projections, or a slope for collecting the oil, and dams are formed on a forward end face of the installation section to block the oil flowing down along the circumferential direction on the forward end face and guides the oil toward each projection.Type: GrantFiled: February 2, 2007Date of Patent: March 20, 2012Assignee: Nok CorporationInventors: Satoshi Yamanaka, Takehiro Nakagawa, Masayuki Tanida, Hideharu Hyakutake, Hiroki Matsui, Hideyuki Furuyama, Go Kanzaki, Shinya Takeda, Kei Sasaki, Akira Yamaguchi
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Publication number: 20120007319Abstract: To improve durability of a seal lip of a sealing device attached to a shaft hole in a housing so as to slidably contact with a shaft, the sealing device has a sealing device body integrally having a tubular fixation portion fixed to the inner periphery of the shaft hole and a seal lip in slidable contact with the shaft and an oil supply member integrally having a tubular fitting portion fitted to the inner peripheral side of the fixation portion and a flange-like oil supply portion provided so as to extend radially inward from the fitting portion, the oil supply portion is arranged at a sealing fluid side from the end of the seal lip, radially inwardly extending protrusions are provided at an inner peripheral edge of the oil supply portion, and oil transmission grooves are provided on the protrusions so as to extend toward their ends.Type: ApplicationFiled: July 9, 2008Publication date: January 12, 2012Applicant: NOK CORPORATIONInventors: Daisuke Miura, Takehiro Nakagawa
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Publication number: 20110221140Abstract: To improve sealing performance, a sealing device comprises an oil seal (10) mounted to a non-rotating housing (2), and a dust cover (20) mounted to a rotating body (5) outside the oil seal (10), one of the oil seal (10) and the dust cover (20) facing each other has an external seal lip (24) slidably in close contact with the other of them (10, 20) outside the slide sections (S1, S2) between the oil seal (10) and the rotating body (5), the oil seal (10) and the dust cover (20) have non-contact lips (16, 25) which are positioned outside the slide sections (S1, S2) and inside the external seal lip (24), have substantially conical tubular shapes becoming larger in diameter toward the tips thereof, and are loosely inserted to each other, and a labyrinth seal (30) is provided at the outer diameter side of the external seal lip (24).Type: ApplicationFiled: October 6, 2009Publication date: September 15, 2011Applicant: NOK CORPORATIONInventor: Takehiro Nakagawa
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Publication number: 20110175632Abstract: The activity of cells is reduced without administering drugs or performing surgical removals. Electromagnetic waves having a frequency of 30 GHz to 3 THz are emitted to cells to reduce activity of the cells.Type: ApplicationFiled: September 30, 2009Publication date: July 21, 2011Applicant: Panasonic Electric Works Co., LTD.Inventors: Takehiro Nakagawa, Chosei Hamada
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Patent number: 7951074Abstract: An endoscope device is proposed for dealing with an erroneous operation of a surgeon. An endoscope device has an endoscope and a processor, wherein the endoscope has a switch unit and the processor has a CPU and an operating panel. In the event that the CPU of the processor detects that, of a first instruction signal transmitted from the switch unit and a second instruction signal transmitted from the operating panel, the instructions for performing the predetermined operation are not performed normally with one of the instruction signals, and instructions for performing an operation other than the predetermined operation is performed normally with the other instruction signal, the CPU stops the transmission of one of the instruction signals, and validates the operation content instructed by the other instruction signal.Type: GrantFiled: January 26, 2007Date of Patent: May 31, 2011Assignee: Olympus CorporationInventors: Tomoki Iwasaki, Tsutomu Hirai, Yutaka Fujisawa, Akihito Kawamura, Akihiko Mochida, Shoichi Amano, Kotaro Ogasawara, Katsuyuki Saito, Susumu Hashimoto, Makoto Tsunakawa, Takehiro Nakagawa
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Publication number: 20110095486Abstract: Ridge and groove sections (24) having first slope surfaces (24a) and second slope surfaces (24b) are formed at a predetermined circumferential pitch on at least either of a slide seal surface (21) and an atmosphere-side conical surface (23) of a seal lip (2), the first slope surfaces (24a) slope at a gentle gradient in the direction of narrowing gaps between the first slope surfaces (24a) and the outer peripheral surface of a rotation body (10) toward the rotation direction of the rotation body (10), the second slope surfaces (24b) rise at a steeper gradient than the first slope surface (24a) from narrow gap portions, and a part of sealed fluid introduced into the gaps enters like a wedge toward the narrow gap portions as the rotation body (10) rotates, to generate dynamic pressure, and forms a thick fluid lubrication film to reduce slide resistance.Type: ApplicationFiled: August 27, 2008Publication date: April 28, 2011Applicant: NOK CORPORATIONInventor: Takehiro Nakagawa
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Publication number: 20110068542Abstract: A sealing device has a sealing device main body (1), in which a seal lip (13) oriented to an in-machine (A) side slidably contacts with the outer peripheral surface of a rotating body (4), and a pumping device (2) having a helical groove (2a) which feeds fluid to the seal lip (13) side by rotation of the rotating body (4), the groove being formed in a surface opposed to the outer peripheral surface of the rotating body (4) to be positioned at the in-machine (A) side of the seal lip (13), and discharge flow passages (2b) which make a space (C) between the sealing device main body (1) and the pumping device (2) communicate with the in-machine (A) side, whereby sufficient lubricating oil can be supplied to a sliding portion of the seal lip and heat generation and the wear of the seal lip can be suppressed.Type: ApplicationFiled: June 4, 2009Publication date: March 24, 2011Applicant: NOK CORPORATIONInventor: Takehiro Nakagawa
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Publication number: 20110022128Abstract: The hair-growth device (10) is configured to grow hair utilizing light. The hair-growth device (10) includes an irradiator (20) configured to irradiate one's skin with light. The irradiator (20) is configured to irradiate with the light having a wavelength equivalent to a specific absorption wavelength of water.Type: ApplicationFiled: March 31, 2009Publication date: January 27, 2011Inventors: Takehiro Nakagawa, Chosei Hamada
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Publication number: 20110006485Abstract: A sealing device (1) having an oil seal (10) mounted to non-rotatable housing (2) and also having a slinger (20) mounted to a rotating body (5) on the inner peripheral side of the oil seal (10) so as to be located on the axially outer side of the oil seal (10), the oil seal (10) having an oil-resistant seal lip (13) slidably in close contact with the outer peripheral surface of the rotating body (5), wherein a seal ring (30) axially opposed to the slinger (20) is provided outward of the oil-resistant seal lip (13), a gap (G3) being formed between the seal ring (30) and the slinger (20) so as to decrease to the outer diameter side. The construction prevents muddy water etc. from entering from the outside (A) into a slide section (S1) of the oil-resistant seal lip (13).Type: ApplicationFiled: February 16, 2009Publication date: January 13, 2011Applicant: NOK CORPORATIONInventor: Takehiro Nakagawa