Patents by Inventor Kenji Yamazaki
Kenji Yamazaki 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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Patent number: 6302910Abstract: An artificial heart has a driving section, a nozzle section, a pump section for insertion into a ventricle of a human heart, and a sealing section forming a seal for a driving shaft extending from the driving section for driving the pump section. A sealing liquid chamber filled with a sealing liquid is formed around the driving shaft between the sealing mechanism and the driving section. The sealing liquid in the sealing liquid chamber maintains the sealing mechanism in a liquid-tight state and lubricates the sealing mechanism, whereby blood is prevented from entering the driving section. Even if blood happens to enter the driving section, the blood is mixed with the sealing liquid and does not coagulate. Thus, the operation of the artificial heart is not suppressed.Type: GrantFiled: December 22, 1999Date of Patent: October 16, 2001Assignees: Sun Medical Technology Research Corporation, NOK Corporation, Seiko Epson CorporationInventors: Kenji Yamazaki, Toshio Mori, Haruo Iiyama, Shunichi Yamazaki, Nobutaka Ito, Osami Miyao, Masanori Hori, Yukio Iwasaki, Hitoshi Adachi, Kouji Higuchi
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Patent number: 6294736Abstract: A protector for fixing a wire harness comprises a protector body having a chamber for accommodating the wire harness, a flexible band member one end of which is supported by one side wall of the protector body as a base end and the other end of which is a free end drawable inside the chamber, the flexible band including a first engaging member on the free end thereof, and a locking member provided on an inner face of the chamber, the locking member arranged so as to be able to lock the first engaging member of the band member which is wound on an outer periphery of the wire harness accommodated within the chamber.Type: GrantFiled: April 27, 1999Date of Patent: September 25, 2001Assignee: Yazaki CorporationInventors: Ikuo Takeda, Yasuyoshi Goto, Kenji Yamazaki
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Patent number: 6229091Abstract: A wire harness protector 21 is capable of holding a wire harness 23, and includes a grip portion 33, and the grip portion 33 is mounted on a mounting member (first link) 25 while being flexed. The wire harness protector further includes a cover (protector cover) 30 for preventing the flexing of the grip portion 33.Type: GrantFiled: August 25, 1999Date of Patent: May 8, 2001Assignee: Yazaki CorporationInventors: Tatsuo Ogawa, Kenji Yamazaki
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Patent number: 6154866Abstract: A first error corrector performs error detection and error correction using inner codes on data subjected to an error correction coding processing with multiplication codes and a second error corrector performs error detection and error correction using outer codes on the data. A condition discriminator discriminates whether or not the data satisfies predetermined conditions, and a controller responds to the discriminator to prevent error detection and error correction using outer codes. Consequently, power for error detection and error correction is consumed only when sufficiently reliable data can be obtained by error detection and error correction using inner codes.Type: GrantFiled: May 29, 1998Date of Patent: November 28, 2000Assignee: Sony CorporationInventors: Minoru Kawahara, Kenji Yamazaki
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Patent number: 6123726Abstract: A portable drive system for an artificial heart can be provided that includes a blood pump 1 having a blood seal for sealing a rotation shaft 13, a system drive section 45 including a purge solution circulator 20 for supplying by circulating purge solution to the blood seal 18, a pump controller 30 for driving the blood pump 1, a power supply means 33 for supplying electric power thereto, a display 40 for displaying operating states thereof, a communication interface 50 for transmitting information to the outside, and a controller means 100 for controlling these components, a portable transport section 60 for bearing the system drive section 45, and a connecting section 70 for connecting the blood pump 1 and the system drive section 45. The portable artificial-heart drive system has high safety and high reliability, is small-sized, lightweight and easy to use, and can expand the range of life.Type: GrantFiled: March 24, 1999Date of Patent: September 26, 2000Assignees: Seiko Epson Corporation, Sun Medical Technology Research CorporationInventors: Toshio Mori, Kenji Yamazaki, Koji Higuchi, Keiichi Kaneko
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Patent number: 5971962Abstract: A skin button comprising a cylindrical core component secured in the subcutaneous tissue of the living body as passing through the tissue, the core component has thorough holes which pass through the subcutaneous tissue and let skin penetrating components be inserted which pass into and out of the subcutaneous tissue, the core component has a tubular component made of fiber base material consisting of biocompatible fibers on the rim of the part of the core component which contacts the living tissue. The living tissue grows into the space among fibers of basic fiber materials of the tubular component to securely hold this skin button in the subcutaneous tissue as well as to ensure prevention of bacterial infection.Type: GrantFiled: March 10, 1998Date of Patent: October 26, 1999Assignee: Sun Medical Technology ResearchInventors: Akira Kojima, Kenji Yamazaki, Toshio Mori, Sakashi Kobayashi, Osamu Tagusari
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Patent number: 5810758Abstract: An apparatus for circulating a purge solution in an artificial organ has an ultrafiltration filter or reverse osmosis filter in a purge solution circulation route to inhibit passage of substances having molecular weights of 340,000 or more. A portion of the purge solution circulated by a purge solution circulation pump is passed through this filter to remove proteins that have mixed in the purge solution. The purge solution free from the proteins is supplied and circulated through the artificial organ. Proteins that have externally mixed in the purge solution can be prevented from coagulating and depositing on a seal mechanism and the like of the artificial organ.Type: GrantFiled: May 15, 1997Date of Patent: September 22, 1998Assignee: Sun Medical Technology Research CorporationInventors: Kenji Yamazaki, Toshio Mori, Masanori Hori
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Patent number: 5730401Abstract: A clip mounted with a mounting plate having opposite walls defining a mounting groove having an opened leading end, the clip which has a clip body made of an elastic metal plate, having a V-shape portion with substantially V-shape cross section formed by folding back, so as to have two opposite inclined plate portions, the inclined plate potions having opposite slits, respectively, the opposite walls of the mounting plate inserted into the slits, respectively, when the clip body is inserted into the mounting groove from the leading end of the clip body, so that the opposite walls of the mounting groove are inserted into the slits, the mounting plate is engaged with the slits, and a slit start portion adjacent to the leading end of the V-shape potion is elastically supported by the opposite walls of the mounting plate with an elastic force of the opposite inclined plate portions; and a base having a clip-body holding portion for holding the clip body, a harness securing portion which is made of resin and to whType: GrantFiled: October 24, 1996Date of Patent: March 24, 1998Assignee: Yazaki CorporationInventors: Ikuo Takeda, Kenji Yamazaki
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Patent number: 5615179Abstract: An electronic apparatus with a fitting band has a structure for containing conductive members in the fitting band which permits easy production of the fitting band and which improves the durability, design, fitting properties and so on of the fitting band containing the conductive members.An end piece plate (21a) which forms an end piece (21) has recessed portions (21c) formed for holding pipes (50) and conductive wires (30) under predetermined pressure. A piece plate (31a) which forms a piece member (31) has recessed portions (31c) formed for containing, with play, the pipes (50) and the conductive wires (30). The conductive wires (30) which are passed through the pipes (50) are mounted on the end piece plate (21a) and the piece plate (31a) so as to rotatably connect the end piece (21) and the piece member (31) after assembly. Since the end piece (21) is fixed to the case band of a wrist watch, no load is applied to the connection portion at the ends (30a) of the conductive wires (30).Type: GrantFiled: May 1, 1995Date of Patent: March 25, 1997Assignee: Seiko Epson CorporationInventors: Akio Yamamoto, Wataru Iwanami, Hiroshi Yabe, Kenji Yamazaki, Tatsumi Miyashita, Akeshi Tsurubuchi
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Patent number: 5577076Abstract: In a scanning receiver for receiving a signal by scanning the frequency of a received signal, the speed of a scanning operation is made fast with skipping non-modulated signals and digital signals. AF signal is changed into A/D converted values, and first and second amplitude distribution are respectively formed from A/D converted values. Non-modulated signal is discriminated based on the first amplitude distribution, and digital signal is discriminated based on the second amplitude distribution.Type: GrantFiled: March 20, 1995Date of Patent: November 19, 1996Assignee: Uniden CorporationInventors: Kazunori Sato, Hironori Warabi, Yasuyoshi Nakano, Kenji Yamazaki
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Patent number: 5531789Abstract: An artificial internal organ, such as an artificial heart, comprising a pump unit through which blood circulates and a drive shaft for driving the pump unit, the drive shaft having a shaft sealing system thereon. The shaft sealing system is supplied with a sealing solution from a sealing solution chamber and a sealing solution bag. The sealing solution is formed mainly of a physiological saline, which is loaded with a protease or several kinds of aminopeptides. When blood gets into the shaft sealing system, it is prevented from coagulating by these admixtures. Although blood in the shaft sealing system of this type coagulates in a unique mechanism different from a conventional one, the protease and the aminopeptides never lose their effects even in such a unique situation.Type: GrantFiled: December 21, 1994Date of Patent: July 2, 1996Assignee: Sun Medical Technology Research CorporationInventors: Kenji Yamazaki, Toshio Mori
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Patent number: 5275580Abstract: An auxiliary artificial heart embedded in the human body. The auxiliary artificial heart has an apex cordis area ring and a body. The apex cordis area ring is embedded in a cut-out apex cordis area of the human heart. The body includes an elongated pump section and a drive section. The pump section is inserted into one of the ventricles of the human heart, passing through the apex cordis area ring. A front end nozzle whose diameter is smaller than that of the pump section is formed at the front end of the pump section, and it is inserted into the aorta or pulmonary artery, passing through the center of the aorta or pulmonary valve. The pump section sucks blood in the ventricle through its base portion and feeds it into the aorta or pulmonary artery through the front end nozzle.Type: GrantFiled: June 19, 1992Date of Patent: January 4, 1994Assignees: Kenji Yamazaki, Sun Medical Technology Research CorporationInventor: Kenji Yamazaki
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Patent number: 5147388Abstract: An auxiliary artificial heart embedded in the human body. The auxiliary artificial heart has an apex cordis area ring and a body. The apex cordis area ring is embedded in a cut-out apex cordis area of the human heart. The body includes an elongated pump section and a drive section. The pump section is inserted into one of the ventricles of the human heart, passing through the apex cordis area ring. A front end nozzle whose diameter is smaller than that of the pump section is formed at the front end of the pump section, and it is inserted into the aorta or pulmonary artery, passing through the center of the aorta or pulmonary valve. The pump section sucks blood in the ventricle through its base portion and feeds it into the aorta or pulmonary artery through the front end nozzle.Type: GrantFiled: March 5, 1991Date of Patent: September 15, 1992Assignees: Kenji Yamazaki, Misuzu Industries CorporationInventor: Kenji Yamazaki
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Patent number: 4511761Abstract: A switching element is inserted in a power supply line to a transmission circuit in the portable unit of a cordless telephone. The charge potential which is supplied from the base unit to the portable unit actuates the switching element to break the power supply line when the portable unit is replaced on the cradle of the base unit.Type: GrantFiled: June 17, 1982Date of Patent: April 16, 1985Assignee: Uniden Corporation of JapanInventors: Kenji Yamazaki, Kazuo Maeda
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Patent number: D319323Type: GrantFiled: November 15, 1989Date of Patent: August 20, 1991Assignee: Tokai CorporationInventors: Tsutomu Shike, Kenji Yamazaki, Isao Inoue
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Patent number: D327813Type: GrantFiled: May 29, 1991Date of Patent: July 14, 1992Assignee: Tokai CorporationInventors: Tsutomu Shike, Isao Inoue, Kenji Yamazaki
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Patent number: D334589Type: GrantFiled: September 6, 1991Date of Patent: April 6, 1993Assignee: Tokai CorporationInventors: Tsutomu Shike, Isao Inoue, Kenji Yamazaki